CN101547447A - Broadband wireless signal covering network based on passive optical network structure - Google Patents
Broadband wireless signal covering network based on passive optical network structure Download PDFInfo
- Publication number
- CN101547447A CN101547447A CN200910068683A CN200910068683A CN101547447A CN 101547447 A CN101547447 A CN 101547447A CN 200910068683 A CN200910068683 A CN 200910068683A CN 200910068683 A CN200910068683 A CN 200910068683A CN 101547447 A CN101547447 A CN 101547447A
- Authority
- CN
- China
- Prior art keywords
- optical
- signal
- broadband
- uplink
- wavelength
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 211
- 239000013307 optical fiber Substances 0.000 claims abstract description 60
- 230000005540 biological transmission Effects 0.000 claims abstract description 31
- 238000004891 communication Methods 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims description 27
- 239000004065 semiconductor Substances 0.000 claims description 12
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000008054 signal transmission Effects 0.000 claims description 7
- 230000002457 bidirectional effect Effects 0.000 claims description 5
- 230000003321 amplification Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 3
- 230000035559 beat frequency Effects 0.000 claims description 2
- 230000005284 excitation Effects 0.000 claims 2
- 238000006073 displacement reaction Methods 0.000 description 23
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 238000011144 upstream manufacturing Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 230000005693 optoelectronics Effects 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 239000000969 carrier Substances 0.000 description 4
- 230000005622 photoelectricity Effects 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Images
Landscapes
- Optical Communication System (AREA)
Abstract
一种基于无源光网络结构的宽带无线信号覆盖网络，第一光纤功率分配器/合波器，将光发射机的光载波信号分配给多个光纤功率分配器；多个用户终端单元，对应接收光纤功率分配器的光载波信号，通过天线发射到空中，同时通过天线接收用户上行RF信号；光波长复用/解复用器件，汇集多个用户终端单元的用户上行光信号，向上行方向传输；第二光纤功率分配器/合波器，汇集用户上行光信号并向上行方向传输；宽带光接收机，将接收到的多波长的用户上行光信号转换为有多个带宽的宽带RF信号送往上层设备。本发明解决了大规模大型室内多用户同时实现宽带无线通信的问题，增强了对上行光信号功率水平动态变化的适应性，可以适应多种不同无线通讯体系的功能要求。
A broadband wireless signal coverage network based on a passive optical network structure, the first optical fiber power splitter/multiplexer distributes the optical carrier signal of the optical transmitter to multiple optical fiber power splitters; multiple user terminal units, corresponding to Receive the optical carrier signal of the optical fiber power splitter, transmit it to the air through the antenna, and receive the user's uplink RF signal through the antenna at the same time; the optical wavelength multiplexing/demultiplexing device collects the user's uplink optical signals of multiple user terminal units, and sends them to the uplink direction Transmission; the second optical fiber power splitter/combiner, which collects the user's uplink optical signals and transmits them in the uplink direction; broadband optical receiver, converts the received multi-wavelength user uplink optical signals into broadband RF signals with multiple bandwidths sent to the upper device. The invention solves the problem of simultaneously realizing broadband wireless communication for large-scale and large-scale indoor multi-users, enhances the adaptability to the dynamic change of the power level of the uplink optical signal, and can adapt to the functional requirements of various wireless communication systems.
Description
Technical field
The present invention relates to a kind of broadband wireless signal covering network.Particularly relate to a kind of broadband wireless signal covering network that fairly large and large-scale indoor broadband wireless signal covers that is suitable for based on passive optical network structure.
Background technology
Along with popularizing of 3G technology, the continuous development of 4G and millimeter-wave technology, wireless technology has the trend that further develops to the high-frequency section, and is the mode of multiple standard and the coexistence of multiple band signal.Because high-frequency signal space attenuation is big and the restriction of cable transmission characteristic, especially under the indoor environment of complexity, the transmission of broadband wireless signal and covering problem have become and have become increasingly conspicuous.Statistics shows that most of wireless signal transmitting-receiving is to take place under the indoor environment, and the WiMAX that does not solve indoor environment covers satisfied broadband wireless service can't be provided, and indoor covering has become problem demanding prompt solution in the ng mobile communication.The mode that the Optical Fiber Transmission wireless signal is generally had an optimistic view of, this mainly is that the optical fiber repeater in 2G epoch is exactly a good example because optical fiber has high bandwidth and low-loss characteristic, optical fiber repeater has been realized the function that base station signal zooms out.Yet, present optical fiber repeater is based on point-to-point mode, be applied under optical fiber distributed type antenna system (ODAS) situation of point-to-multipoint, distinct issues are exactly that the upward signal optical transmission is difficult to solve well, under the situation that the user increases, wavelength resource finite sum photoelectric device price problem of higher sharply rises system cost.At up optical transmission problem, technical development at FTTH in the recent period merits attention, by adopting local side power light source and user side to adopt the WDMPON technology of injection locking F-P cavity semiconductor laser is the up optical transmission mode of a kind of low-cost FTTH that is expected, and can be used for reference in ODAS fully; Yet also should see, even adopt all optical wavelength of series of DWDM, its quantity remains limited, when number of users further increases, the limited contradiction of wavelength resource just can be given prominence to, and how to realize under the framework of WDMPON that therefore the multi-user's access more than DWDM complete series number of wavelengths also is an important problems.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of and realize that by the fiber distribution antenna system configuration that adopts covering of downlink broadcast broadband and up wavelength division multiplexing fairly large and large-scale indoor broadband wireless signal covers, shift frequency coupling by many band signal transmission of optical fiber and user terminal, can adapt to the covering requirement of multiple different radio communication system (standard) and different user scale, and under the framework of WDMPON, the mode of reusing by optical wavelength realizes the broadband wireless signal covering network based on passive optical network structure that the multizone multi-user more than DWDM complete series number of wavelengths inserts.
The technical solution adopted in the present invention is: a kind of broadband wireless signal covering network based on passive optical network structure, include: optical sender, be used for the base station down broadband RF signal is modulated into optical carrier and emission, at the more users situation, the RF signal of a plurality of system bandwidths constitutes many band RF signals through frequency displacement and is modulated on the light signal together; First optical fiber power distributor/wave multiplexer is distributed to a plurality of optical fiber power distributors to the optical carrier of optical sender in the future, and each optical fiber power distributor finally distributes; A plurality of subscriber terminal units, the corresponding final optical carrier that distributes of optical fiber power distributor that receives, be transmitted in the air by antenna through opto-electronic conversion and frequency displacement processing back, receive user uplink RF signal by antenna simultaneously, modulation specific wavelength light source forms up optical carrier after frequency displacement is handled; Optical wavelength multiplexing/demultiplexing device compiles the user uplink light signal that sends from a plurality of subscriber terminal unit, transmits to up direction; Second optical fiber power distributor/wave multiplexer compiles the user uplink light signal from a plurality of optical wavelength multiplexings/demultiplexing device, and transmits to up direction; The broadband light receiver, the broadband RF signal that the user uplink light signal that is used for the multi-wavelength that will receive is converted to a plurality of bandwidth is sent to upper layer device.
For large-scale broadband wireless signal covering network, for the photo-beat of avoiding the identical wavelength that up light-receiving occurs is disturbed frequently, must be in certain frequency band with the up frequency limitation of RF signals of being with more, this restriction is relevant with the light multi-wavelength system that is adopted, and concrete optical source wavelength with DWDM optical filter characteristic that adopted and multi-user is relevant; Variant user adopts the different channel frequency modulation uplink optical signal of system assignment, corresponding optical receiver in the whole network, and it is simultaneously up not allow to occur simultaneously two identical frequency channels.
The broadband light receiver has incident optical signal dynamic range self adaptation adjustment capability, to adapt to the distinctive change in optical signal characteristics of PON structure, the broadband light receiver is by adding multi-wavelength optical fiber preamplifier before the broadband light electric explorer, realization is at the quick gain control function of the big dynamic change of input multiple wavelength optical signal, guaranteeing that the light signal that each up user's light signal can keep the relatively stable of gain and enter into the broadband light electric explorer has suitable power level, also integratedly in the broadband light receiver receive the broadband automatic gain control RF amplifier of broadband photo detector signal and be with modular converter under the frequency displacement more.
During the up structure of described network using single fiber, include optical sender, be used for downstream broadband RF signal modulation in station is constituted many band RF flashlight carrier waves and emission; An optical fiber power distributor is used for the many band RF optical carriers from optical sender are distributed to a plurality of subscriber terminal units; A plurality of subscriber terminal units, the corresponding optical carrier that receives the distribution of optical fiber power distributor, be transmitted in the air by antenna through opto-electronic conversion and necessary frequency displacement processing back, receive mobile subscriber's upstream rf signal by antenna simultaneously, modulation specific wavelength light source forms up optical carrier after the frequency displacement of necessity is handled; An optical wavelength multiplexing/demultiplexing device will be given a plurality of subscriber terminal units from the multi wave length illuminating source signal allocation of high-power CW multi wave length illuminating source, compile the user uplink light signal that sends from a plurality of subscriber terminal unit, and transmit to up direction; High-power CW multi wave length illuminating source is as the exciting light source of subscriber terminal unit specific wavelength optical sender; Optical circulator with user uplink light signal and multi-wavelength exciting light source Signal Separation, makes user's uplink optical signal enter the broadband light receiver, and the broadband RF signal that is converted to a plurality of bandwidth by the broadband light receiver is sent to upper layer device.
During the two fine up structure of described network using, include optical sender, be used for the modulation of base station down broadband RF signal is constituted many band RF signals and emission; An optical fiber power distributor is used for the many band RF optical carriers from optical sender are distributed to a plurality of subscriber terminal units; A plurality of subscriber terminal units, the corresponding optical carrier that receives the distribution of optical fiber power distributor, be transmitted in the air by antenna through opto-electronic conversion and necessary frequency displacement processing back, receive mobile subscriber's upstream rf signal by antenna simultaneously, modulation specific wavelength light source forms up optical carrier after the frequency displacement of necessity is handled; High-power CW multi wave length illuminating source is as the light signal of the specific wavelength optical sender of subscriber terminal unit; Optical wavelength multiplexing/demultiplexing device will be given a plurality of subscriber terminal units from the multi wave length illuminating source signal allocation of high-power CW multi wave length illuminating source; Second optical wavelength multiplexing/demultiplexing device compiles the uplink optical signal from a plurality of subscriber terminal units, sends to optical receiver, and by the broadband light receiver, the broadband RF signal that is converted to a plurality of bandwidth is sent to upper layer device.
Described high-power CW multi wave length illuminating source includes: the prime fiber amplifier is used to provide wideband A SE radiation; Back level fiber amplifier is used for multi-wavelength signals is carried out power amplification; Be connected the thin shape optical filter between prime fiber amplifier (7.1) and the back level fiber amplifier (7.3).
Described a plurality of subscriber terminal unit is the bidirectional transmit-receive module that a photoelectricity mixes, and downstream signal transmits and comprises a broadband light receiver; A wideband RF amplifier is used for the RF signal that amplified broad band optical receiver (5.1) is exported; Shared pair of merit device of module is by the descending RF signal of antenna transmission; Upward signal transmits and comprises the antenna that receives upstream rf signal, shared pair of merit device of module, a wideband RF amplifier, an injection locking F-P cavity semiconductor laser, specific wavelength light signal from high-power CW multi wave length illuminating source is locked in specific wavelength with injection locking F-P cavity semiconductor laser, and injection locking F-P cavity semiconductor laser forms uplink optical signal after the output modulation of wideband RF amplifier (5.4).
Described a plurality of subscriber terminal unit is the bidirectional transmit-receive module that a photoelectricity mixes, and downstream signal transmits and comprises a broadband light receiver; A wideband RF amplifier is used for the RF signal that amplified broad band optical receiver (5.1) is exported; Shared pair of merit device of module is by the descending RF signal of antenna transmission; Upward signal transmits and comprises the antenna that receives upstream rf signal, shared pair of merit device of module, a wideband RF amplifier, an electric absorption broad band electrooptic modulator, the output of wideband RF amplifier is modulated on the electric absorption broad band electrooptic modulator, from the specific wavelength light signal of high-power CW multi wave length illuminating source in the electric absorption broad band electrooptic modulator through RF signal modulation back formation uplink optical signal.
Described a plurality of subscriber terminal unit has the frequency displacement function, and the broadband light receiver described in downstream signal transmits is to also being disposed with downstream broadband RF pre-amplifier, an OUN local oscillator unit, descending band pass filter and downstream broadband RF power amplifier between shared pair of merit device of module; Shared pair of merit device of module described in upward signal transmits is to also setting gradually up broadband RF low noise amplifier, an OUN local oscillator unit, up band pass filter and up broadband light transmitter driving amplifier between the electrooptic modulation broadband light transmitter.
The RF signal of described a plurality of system bandwidths is respectively applied for and covers different a plurality of zones, so that the maximum number of user amount that realization system air interface limits in zone separately, this method is applicable to that also the RF signal of a plurality of system bandwidths described in outdoor many cell-site antennas and the base stations control still is the wireless communication signal of different systems, comprise different frequency range, different modulating mode and the situation that the overlapping frequency range is arranged, in subscriber terminal unit, send or receive, be used to realize that the wireless communication signal of different systems covers through different RF paths and antenna.
Broadband wireless signal covering network based on passive optical network structure of the present invention has the following advantages and good effect:
1. by the mode of Optical Fiber Transmission broadband wireless signal, wireless base station signal directly is transferred to the subregion antenna, under the situation that does not take the launching tower frequency resource, solves indoor wireless signal covering problem; By adopting many band signals optical transmission to make full use of the bandwidth resources of Optical Fiber Transmission, especially select the up ROF scheme of particular frequency bands, for covering provides more channel resource, solved the problem that extensive large-scale indoor multi-user realizes broadband wireless communications simultaneously.
2. the mode by the shared same optical receiver of uplink optical signal has further reduced the cost based on the up scheme of WDMPON, adopt the optical wavelength reuse means to solve contradiction between number of wavelengths finite sum number of users is huge, and strengthened adaptability the dynamic change of uplink optical signal power level by the method that increases the preposition image intensifer of self adaptation.
3. reduced the cost of upward signal optical transmission scheme by WDMPON structure and low-cost special wavelength light transmitter schemes
4. this solution has the advantage that can upgrade flexibly and dispose, can adapt to the functional requirement of multiple different radio communication system.
Description of drawings
Fig. 1 is based on the overall structure schematic diagram of fiber distribution antenna (ODAS) network of EPON;
Fig. 2 is multi-user's uplink optical signal spectral composition and RF frequency band limits schematic diagram;
Fig. 3 is the structured flowchart that comprises the up optical receiver of adaptive optical signal power control;
Fig. 4 is based on fiber distribution antenna (ODAS) schematic network structure of the up WDMPON of injection locking wavelength;
Fig. 5 is based on fiber distribution antenna (ODAS) schematic network structure of the up WDMPON of EA modulator;
Fig. 6 is based on the high-power CW multi wave length illuminating source structural representation of fiber amplifier;
Fig. 7 is a subscriber terminal unit structural representation of realizing user's optical sender specific wavelength;
Fig. 8 is a subscriber terminal unit structural representation of realizing the another kind of embodiment of user's optical sender specific wavelength;
Fig. 9 is the subscriber terminal unit structural representation with frequency shift function;
Figure 10 is fiber distribution antenna (ODAS) schematic network structure with multi-modulation scheme wireless signal covering function;
Figure 11 is the subscriber terminal unit structural representation with multi-modulation scheme wireless signal covering function.
Wherein:
1: optical sender 2: the broadband light receiver
2.1: multi-wavelength optical fiber preamplifier 2.2: broadband light electric explorer
2.3: modular converter under broadband automatic gain control RF amplifier and the frequency displacement of many bands
3: the first optical fiber power distributor/wave multiplexers
3 ': second optical fiber power distributor/wave multiplexer 4: optical fiber power distributor
5: subscriber terminal unit 5.1 broadband light receivers
5.21: injection locking F-P cavity semiconductor laser
5.22: the electric absorption broad band electrooptic modulator
5.3: wideband RF amplifier 5.32: downstream broadband RF power amplifier
5.33: descending band pass filter 5.34:OUN downstream broadband RF power amplifier
5.35:OUN descending band pass filter 5.4: wideband RF amplifier
5.41: up broadband light transmitter driving amplifier 5.42: up broadband RF low noise amplifier
5.43 the up broadband RF low noise amplifier of up band pass filter 5.44:OUN
5.45:OUN up band pass filter 5.5: shared pair of merit device of module
5.6: 5.7: the two OUN local oscillators unit, an OUN local oscillator unit
5.8:OUN RF duplexer+antenna 6: optical wavelength multiplexing/demultiplexing device
6 ': second optical wavelength multiplexing/demultiplexing device 7: high-power CW multi wave length illuminating source
7.1: prime fiber amplifier 7.2: dredge the shape optical filter
7.3: back level fiber amplifier 8: optical circulator
Embodiment
Below in conjunction with embodiment and accompanying drawing the broadband wireless signal covering network based on passive optical network structure of the present invention is made a detailed description.
It is proposed by the invention that a kind of (or claiming base station local side) to the DAS scheme of indoor user antenna is from the wireless base-station control center, make full use of the big superiority bandwidth of broadband RF technology and optical sender/receiver, by adopting EPON (PON) structure, following behavior broadcasting coverage mode; Up on the basis of adopting the WDMPON structure, solve the contradiction of number of wavelengths finite sum number of users between huge by the optical wavelength reuse means, up multiple wavelength optical signal adopts the least possible broadband light receiver after arriving the base station local side, under the situation that realizes the indoor covering of extensive multiple spot, further reduce local side apparatus quantity, reduce system cost.
The present invention realizes covering based on the broadband wireless signal of optical transmission by a kind of optical fiber passive network configuration of two-stage framework, specifically comprise and adopt the least possible local side optical sender and optical receiver, the multi-region customer solution that WDMPON user uplink optical transport solution and optical wavelength subregion are reused.
As shown in Figure 1, the broadband wireless signal covering network based on EPON (PON) structure of the present invention
Include: optical sender 1, be used for radio communication system base station controller local side downstream broadband RF signal is modulated at light carrier, normally single optical wavelength signal, cover number of spots for increasing, realize that the more broadband wireless user of local environment can be simultaneously online, the broadband RF signal of a plurality of system bandwidths is constituted many band RF signals by the frequency displacement mode, and be modulated on the light wave and launch; First optical fiber power distributor/wave multiplexer 3 connects optical sender 1 by an optical fiber (normally monomode fiber), and gives a plurality of optical fiber power distributors 4 with the signal allocation that optical sender 1 is launched, and each optical fiber power distributor 4 finally distributes; A plurality of subscriber terminal units (OUN) 5, the corresponding optical fiber power distributor 4 final light signals that distribute that receive, be with the RF signals at a plurality of subscriber terminal units 5 through opto-electronic conversion output more, many band RF signals are by frequency displacement and be with the logical air interface frequency band that each isolation region reverts to wireless system that is chosen in, amplifying the back is transmitted in the air by antenna, each isolated area (user) satisfies the demand that the interior multi-user simultaneously in district realizes broadband access to greatest extent by frequency reuse, subscriber terminal unit (OUN) 5 receives the up RF signal of mobile subscriber by antenna simultaneously, after the amplification of necessity and frequency displacement are handled, be modulated at and constitute the user uplink light signal on the specific wavelength light source, frequency displacement is handled and will be carried out according to system requirements, its principle is, in the reception bandwidth of whole broadband light receivers 2, for each mobile subscriber who is in the covering system provides unique wireless channel; Optical wavelength multiplexing/demultiplexing device 6 compiles and transmits the user uplink light signal that a plurality of subscriber terminal units 5 are sent; Second optical fiber power distributor/wave multiplexer 3 ' (reverse optical fiber power distributor), compile the user uplink light signal that a plurality of optical wavelength multiplexings/demultiplexing device 6 compiles, and send the broadband light receiver 2 at base station place to by optical fiber, be sent to upper layer device after being converted to broadband RF signal.Total RF bandwidth of upward signal is corresponding fully with downstream signal, the up-link capacity of each isolated area adopts shared mechanism, attainable maximum up-link capacity is the peak capacity (being similar to the independent sector of exterior aerial) that system's air interface frequency band limits in each isolated area, therefore can adapt to the requirement that local multi-user inserts simultaneously.
For large-scale broadband wireless signal covering network, from different large users and be pooled to second optical fiber power distributor/wave multiplexer 3 ' uplink optical signal co-wavelength (light wave co-wavelength can appear, the RF different frequency range) injects the situation of broadband light receiver 2 simultaneously, for the photo-beat of avoiding the identical wavelength that up light-receiving may occur is disturbed frequently, should limit the frequency range of RF, with up, being with the frequency limitation of RF signals in certain frequency band more, this restriction is relevant with the light multi-wavelength system that is adopted, and DWDM optical filter characteristic concrete and that adopted is relevant.Say that simply such as under the narrower situation of DWDM optical filter bandwidth, the frequency range that photo-beat is disturbed frequently also can be lower slightly, in many band RF signal frequency low sides of selective system, just can relax like this to low frequency; And be with the high-end DWDM of the being subjected to optical filter of RF signal frequency gap size to limit more, at interval big more, be with that the RF signal frequency is high-end can be high more more.As shown in Figure 2, for the DWDM system that is adopted, suppose that frequency bandwidth is f1 in the optical filter passband, passband is f2 at interval, and when RF transmission band during at f1 ~ f2-f1, the light wave beat frequency disturbs can obtain fine evading.
The multiple wavelength optical signal of user uplink can have two kinds of up structures, i.e. up the and two fine up structures of single fiber.
As shown in Figure 4, during the up structure of described network using single fiber, include optical sender 1, be used for the modulation of base station down broadband RF signal is constituted many band RF flashlight carrier waves and emission; An optical fiber power distributor 4 is used for the many band RF optical carriers from optical sender 1 are distributed to a plurality of subscriber terminal units 5; A plurality of subscriber terminal units 5, the corresponding optical carrier that receives 4 distribution of optical fiber power distributor, be transmitted in the air by antenna through opto-electronic conversion and necessary frequency displacement processing back, receive mobile subscriber's upstream rf signal by antenna simultaneously, modulation specific wavelength light source forms up optical carrier after the frequency displacement of necessity is handled; An optical wavelength multiplexing/demultiplexing device 6 will be given a plurality of subscriber terminal units 5 from the multi wave length illuminating source signal allocation of high-power CW multi wave length illuminating source 7, and compile the user uplink light signal that is sent from a plurality of subscriber terminal units 5, transmit to up direction; The high-power CW multi wave length illuminating source 7 of local side is as the exciting light source of subscriber terminal unit 5 specific wavelength optical senders; In the base station or the light directional transmissions device that adopts of local side, it is optical circulator 8, with user uplink light signal and local side multi-wavelength exciting light source Signal Separation, make user's uplink optical signal enter broadband light receiver 2, be converted to broadband RF signal by broadband light receiver 2 and be sent to upper layer device.Owing to adopt the local side pumping signal of single fiber and OUN upward signal to be total to the road transmission plan, can reduce number of fibers and light multiplexing demultiplexing device quantity, but need adopt optical circulator 8 that uplink optical signal is separated with the multi-wavelength pumping signal at local side, make uplink optical signal enter broadband light receiver 2.
And in the up structure of two fibres, up multiple wavelength optical signal in the base station or local side directly enter broadband light receiver 2.
As shown in Figure 5, during the two fine up structure of described network using, include optical sender 1, be used for the modulation of base station down broadband RF signal is constituted many band RF signals and emission; An optical fiber power distributor 4 is used for the many band RF optical carriers from optical sender 1 are distributed to a plurality of subscriber terminal units 5; A plurality of subscriber terminal units 5, the corresponding optical carrier that receives 4 distribution of optical fiber power distributor, be transmitted in the air by antenna through opto-electronic conversion and necessary frequency displacement processing back, receive mobile subscriber's upstream rf signal by antenna simultaneously, modulation specific wavelength light source forms up optical carrier after the frequency displacement of necessity is handled; The high-power CW multi wave length illuminating source 7 of local side is as the light signal of the specific wavelength optical sender of subscriber terminal unit 5; Optical wavelength multiplexing/demultiplexing device 6 will be given a plurality of subscriber terminal units 5 from the multi wave length illuminating source signal allocation of high-power CW multi wave length illuminating source 7; Second optical wavelength multiplexing/demultiplexing device 6 ', compile uplink optical signal from a plurality of subscriber terminal units 5, send the broadband to optical receiver 2, by broadband light receiver 2, the broadband RF signal that is converted to a plurality of bandwidth is sent to upper layer device.Here will be by fiber distribution to user's specific wavelength CW light signal as the specific wavelength light source of subscriber terminal unit 5, the OUN uplink optical signal is through another root optical fiber and second optical wavelength multiplexing/demultiplexing device 6 ' pass back local side, enter broadband light receiver 2, this scheme does not need to adopt optical circulator.
As shown in Figure 3, described broadband light receiver 2 has incident optical signal dynamic range self adaptation adjustment capability, to adapt to the distinctive change in optical signal characteristics of PON structure.Comprise: multi-wavelength optical fiber preamplifier 2.1, receive the broadband light electric explorer 2.2 of multi-wavelength optical fiber preamplifier 2.1 output signals, with have modular converter 2.3 under broadband automatic gain control RF amplifier and the frequency displacement of many bands, the quick gain control function that multi-wavelength optical fiber preamplifier 2.1 is realized at the big dynamic change of input multiple wavelength optical signal, to guarantee that the light signal that each up user's light signal can keep the relatively stable of gain and enter broadband light electric explorer 2.2 has suitable power level, make that broadband light receiver 2 can obtain high-quality RF signal all the time in the upward signal change procedure.
As shown in Figure 6, described high-power CW multi wave length illuminating source 7 includes: prime fiber amplifier 7.1 is used to provide wideband A SE radiation; Back level fiber amplifier 7.3 is used for multi-wavelength signals is carried out power amplification; Be connected the thin shape optical filter 7.2 between prime fiber amplifier 7.1 and the back level fiber amplifier 7.3, each centre wavelength of dredging shape optical filter 7.2 is accurately corresponding with optical wavelength multiplexing/each centre wavelength of demultiplexing device of far-end, dredges the shape optical filter and can adopt a pair of device that is same as far-end optical wavelength multiplexing/demultiplexing device to realize.
As shown in Figure 7, described a plurality of subscriber terminal unit 5 is bidirectional transmit-receive modules that a photoelectricity mixes, downstream signal transmits and comprises a broadband light receiver 5.1, and its RF bandwidth can cover whole downstream signal bandwidth, comprises the total bandwidth of the many band signals that adopt the frequency displacement mode; A wideband RF amplifier 5.3 is used for the RF signal that amplified broad band optical receiver 5.1 is exported; Shared pair of merit device 5.5 of module and antenna, and by the descending RF signal of antenna transmission; Upward signal transmits and comprises the antenna that receives upstream rf signal, shared pair of merit device 5.5 of module, a wideband RF amplifier 5.4, an injection locking F-P cavity semiconductor laser 5.21, specific wavelength light signal from high-power CW multi wave length illuminating source 7 is distributed to the specific user behind light multiplexing demultiplexing device 6, injection locking F-P cavity semiconductor laser 5.21 is locked in specific wavelength, the RF bandwidth of injection locking F-P cavity semiconductor laser 5.21 can cover whole upward signal bandwidth, and injection locking F-P cavity semiconductor laser 5.21 forms uplink optical signal after the output modulation of wideband RF amplifier 5.4.Can comprise among the ONU5 on the frequency/following modular converter, ONU can be mated the broadband signal frequency band and the user terminal frequency band of optical transmission, both can adapt to the requirement for signal coverage under many bands of frequency displacement mode, also can under optical fiber IF transmission conditions, realize the covering of high band more such as millimeter wave equifrequent signal.
As shown in Figure 8, described a plurality of subscriber terminal unit 5 is bidirectional transmit-receive modules that a photoelectricity mixes, can also be: downstream signal transmits and comprises a broadband light receiver 5.1, and its RF bandwidth can cover whole downstream signal bandwidth, comprises the total bandwidth of the many band signals that adopt the frequency displacement mode; A wideband RF amplifier 5.3 is used for the RF signal that amplified broad band optical receiver 5.1 is exported; Shared pair of merit device 5.5 of module is by the descending RF signal of antenna transmission; Upward signal transmits and comprises the antenna that receives upstream rf signal, shared pair of merit device 5.5 of module, a wideband RF amplifier 5.4, an electric absorption broad band electrooptic modulator 5.22, the output of wideband RF amplifier 5.4 is modulated on the electric absorption broad band electrooptic modulator 5.22, from the specific wavelength light signal of high-power CW multi wave length illuminating source 7 in electric absorption broad band electrooptic modulator 5.22 through RF signal modulation back formation uplink optical signal.Broad band electrooptic modulator 5.22 optical signals are outside to be injected, and its wavelength injects signal deciding by the outside, and its RF bandwidth can cover whole upward signal bandwidth.Can comprise frequency (on/down) modular converter among the ONU, ONU can be mated the broadband signal frequency band and the wireless user terminal frequency band of optical transmission, both can adapt to the requirement for signal coverage under many bands of frequency displacement mode, also can under optical fiber IF transmission conditions, realize the covering of high band more such as millimeter wave equifrequent signal.
As shown in Figure 9, the broadband light receiver 5.1 described in downstream signal transmits is to being disposed with downstream broadband RF pre-amplifier 5.31, an OUN local oscillator unit 5.6, descending band pass filter 5.33 and downstream broadband RF power amplifier 5.32 between shared pair of merit device 5.5 of module; Shared pair of merit device 5.5 of module described in upward signal transmits is to setting gradually up broadband RF low noise amplifier 5.42, an OUN local oscillator unit 5.6, up band pass filter 5.43 and up broadband light transmitter driving amplifier 5.41 between the electrooptic modulation broadband light transmitter 5.21.
The RF signal of a plurality of system bandwidths of transmission of the present invention is used to cover different a plurality of zones, can realize the maximum number of user amount that system's air interface limits in the zone separately, be similar to the frequency reuse in the cellular basestation scope, the mode of this broadband many band signals optical transmission also is applicable to the signal transmission of outdoor many cell-site antennas and base station control center.
The RF signal of a plurality of system bandwidths of transmission of the present invention can also be the wireless communication signal of different systems, different systems had both comprised different frequency range, different modulating mode, even the situation that the overlapping frequency range is arranged also can adopt the shift frequency mode to solve, in subscriber terminal unit 5, can send, be used to realize that the wireless communication signal of different systems covers through different RF path and antennas.
Figure 10 is a kind of schematic diagram of realizing fiber distribution antenna (ODAS) network configuration that the multi-modulation scheme wireless signal covers, by the multi-modulation scheme wireless signal is carried with different frequency range RF signal respectively, realize the covering of multi-modulation scheme wireless signal, this mode requires that the RF unit corresponding with the multi-modulation scheme wireless signal arranged in the subscriber terminal unit (ONU) 5, comprises different antenna systems; When self frequency range of multi-modulation scheme wireless signal is not conflicted and within light transmits and receives the unit frequency bandwidth time, these different frequency ranges RF signal can be corresponding with each standard wireless signal frequency range, can adopt suitable frequency spectrum shift mode to transmit and receive the new frequency range of selection within the unit frequency bandwidth at light when conflict.
Figure 11 is the further specifying of a kind of subscriber terminal unit (ONU) 5 structures that have the shift frequency transmission and cover in fiber distribution antenna (ODAS) network configuration that covers of multi-modulation scheme wireless signal, this OUN is the mode that adopts under the transmission band of the multi-modulation scheme wireless signal situation different with covering frequency band, wherein an OUN local oscillator unit 5.6 and the 2nd OUN local oscillator unit 5.7 frequencies are determined according to system requirements, two groups of filters 5.33,5.43 and 5.35,5.45 the aerial frequency range and the optical transmission frequency range of respectively corresponding two kinds of standard wireless signals, two duplexer+antenna elements 5.5,5.8 then be the situation of only corresponding two kinds of aerial frequency ranges of standard wireless signal.
Claims (11)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100686833A CN101547447B (en) | 2009-04-29 | 2009-04-29 | Broadband wireless signal coverage network based on passive optical network structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100686833A CN101547447B (en) | 2009-04-29 | 2009-04-29 | Broadband wireless signal coverage network based on passive optical network structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101547447A true CN101547447A (en) | 2009-09-30 |
| CN101547447B CN101547447B (en) | 2010-12-08 |
Family
ID=41194257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100686833A Expired - Fee Related CN101547447B (en) | 2009-04-29 | 2009-04-29 | Broadband wireless signal coverage network based on passive optical network structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101547447B (en) |
Cited By (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101714907B (en) * | 2009-12-22 | 2013-01-23 | 北京邮电大学 | Passive optical network communication method, passive optical network communication system, optical network unit and optical line terminal |
| US8831428B2 (en) | 2010-02-15 | 2014-09-09 | Corning Optical Communications LLC | Dynamic cell bonding (DCB) for radio-over-fiber (RoF)-based networks and communication systems and related methods |
| CN104081699A (en) * | 2012-01-08 | 2014-10-01 | 欧皮特维股份有限公司 | Optical distributed antenna system |
| CN104221293A (en) * | 2012-01-31 | 2014-12-17 | 大力系统有限公司 | Data Transmission in Virtualized Distributed Antenna System |
| US9112611B2 (en) | 2009-02-03 | 2015-08-18 | Corning Optical Communications LLC | Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof |
| US9178635B2 (en) | 2014-01-03 | 2015-11-03 | Corning Optical Communications Wireless Ltd | Separation of communication signal sub-bands in distributed antenna systems (DASs) to reduce interference |
| US9184843B2 (en) | 2011-04-29 | 2015-11-10 | Corning Optical Communications LLC | Determining propagation delay of communications in distributed antenna systems, and related components, systems, and methods |
| US9219879B2 (en) | 2009-11-13 | 2015-12-22 | Corning Optical Communications LLC | Radio-over-fiber (ROF) system for protocol-independent wired and/or wireless communication |
| US9240835B2 (en) | 2011-04-29 | 2016-01-19 | Corning Optical Communications LLC | Systems, methods, and devices for increasing radio frequency (RF) power in distributed antenna systems |
| US9247543B2 (en) | 2013-07-23 | 2016-01-26 | Corning Optical Communications Wireless Ltd | Monitoring non-supported wireless spectrum within coverage areas of distributed antenna systems (DASs) |
| US9357551B2 (en) | 2014-05-30 | 2016-05-31 | Corning Optical Communications Wireless Ltd | Systems and methods for simultaneous sampling of serial digital data streams from multiple analog-to-digital converters (ADCS), including in distributed antenna systems |
| US9385810B2 (en) | 2013-09-30 | 2016-07-05 | Corning Optical Communications Wireless Ltd | Connection mapping in distributed communication systems |
| US9420542B2 (en) | 2014-09-25 | 2016-08-16 | Corning Optical Communications Wireless Ltd | System-wide uplink band gain control in a distributed antenna system (DAS), based on per band gain control of remote uplink paths in remote units |
| US9455784B2 (en) | 2012-10-31 | 2016-09-27 | Corning Optical Communications Wireless Ltd | Deployable wireless infrastructures and methods of deploying wireless infrastructures |
| US9602210B2 (en) | 2014-09-24 | 2017-03-21 | Corning Optical Communications Wireless Ltd | Flexible head-end chassis supporting automatic identification and interconnection of radio interface modules and optical interface modules in an optical fiber-based distributed antenna system (DAS) |
| US9621293B2 (en) | 2012-08-07 | 2017-04-11 | Corning Optical Communications Wireless Ltd | Distribution of time-division multiplexed (TDM) management services in a distributed antenna system, and related components, systems, and methods |
| US9647758B2 (en) | 2012-11-30 | 2017-05-09 | Corning Optical Communications Wireless Ltd | Cabling connectivity monitoring and verification |
| US9661781B2 (en) | 2013-07-31 | 2017-05-23 | Corning Optical Communications Wireless Ltd | Remote units for distributed communication systems and related installation methods and apparatuses |
| US9673904B2 (en) | 2009-02-03 | 2017-06-06 | Corning Optical Communications LLC | Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof |
| US9681313B2 (en) | 2015-04-15 | 2017-06-13 | Corning Optical Communications Wireless Ltd | Optimizing remote antenna unit performance using an alternative data channel |
| CN106936535A (en) * | 2017-03-10 | 2017-07-07 | 中国科学院半导体研究所 | A kind of optical wavelength associates tracking locking apparatus and method |
| US9715157B2 (en) | 2013-06-12 | 2017-07-25 | Corning Optical Communications Wireless Ltd | Voltage controlled optical directional coupler |
| US9730228B2 (en) | 2014-08-29 | 2017-08-08 | Corning Optical Communications Wireless Ltd | Individualized gain control of remote uplink band paths in a remote unit in a distributed antenna system (DAS), based on combined uplink power level in the remote unit |
| US9775123B2 (en) | 2014-03-28 | 2017-09-26 | Corning Optical Communications Wireless Ltd. | Individualized gain control of uplink paths in remote units in a distributed antenna system (DAS) based on individual remote unit contribution to combined uplink power |
| US9807700B2 (en) | 2015-02-19 | 2017-10-31 | Corning Optical Communications Wireless Ltd | Offsetting unwanted downlink interference signals in an uplink path in a distributed antenna system (DAS) |
| US9948349B2 (en) | 2015-07-17 | 2018-04-17 | Corning Optical Communications Wireless Ltd | IOT automation and data collection system |
| US9974074B2 (en) | 2013-06-12 | 2018-05-15 | Corning Optical Communications Wireless Ltd | Time-division duplexing (TDD) in distributed communications systems, including distributed antenna systems (DASs) |
| US10063319B2 (en) | 2012-02-28 | 2018-08-28 | Dali Systems Co. Ltd. | Hybrid data transport for a virtualized distributed antenna system |
| US10128951B2 (en) | 2009-02-03 | 2018-11-13 | Corning Optical Communications LLC | Optical fiber-based distributed antenna systems, components, and related methods for monitoring and configuring thereof |
| US10136200B2 (en) | 2012-04-25 | 2018-11-20 | Corning Optical Communications LLC | Distributed antenna system architectures |
| US10236924B2 (en) | 2016-03-31 | 2019-03-19 | Corning Optical Communications Wireless Ltd | Reducing out-of-channel noise in a wireless distribution system (WDS) |
| US10291322B2 (en) | 2014-08-25 | 2019-05-14 | Corning Optical Communications LLC | Supporting an add-on remote unit (RU) in an optical fiber-based distributed antenna system (DAS) over an existing optical fiber communications medium using radio frequency (RF) multiplexing |
| US10560214B2 (en) | 2015-09-28 | 2020-02-11 | Corning Optical Communications LLC | Downlink and uplink communication path switching in a time-division duplex (TDD) distributed antenna system (DAS) |
| CN114915342A (en) * | 2022-05-24 | 2022-08-16 | 网络通信与安全紫金山实验室 | Conversion device and signal conversion method for PON and Wi-Fi fusion |
| US11671914B2 (en) | 2010-10-13 | 2023-06-06 | Corning Optical Communications LLC | Power management for remote antenna units in distributed antenna systems |
| CN116381597A (en) * | 2023-05-29 | 2023-07-04 | 成都唯博星辰科技有限公司 | Broadband single-channel direction finding system and implementation method |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2203799A4 (en) | 2007-10-22 | 2017-05-17 | Mobileaccess Networks Ltd. | Communication system using low bandwidth wires |
| US8175649B2 (en) | 2008-06-20 | 2012-05-08 | Corning Mobileaccess Ltd | Method and system for real time control of an active antenna over a distributed antenna system |
| CN102232191B (en) | 2009-02-08 | 2015-07-08 | 康宁移动接入有限公司 | Communication system using cables carrying Ethernet signals |
| WO2013142662A2 (en) | 2012-03-23 | 2013-09-26 | Corning Mobile Access Ltd. | Radio-frequency integrated circuit (rfic) chip(s) for providing distributed antenna system functionalities, and related components, systems, and methods |
| US9184960B1 (en) | 2014-09-25 | 2015-11-10 | Corning Optical Communications Wireless Ltd | Frequency shifting a communications signal(s) in a multi-frequency distributed antenna system (DAS) to avoid or reduce frequency interference |
-
2009
- 2009-04-29 CN CN2009100686833A patent/CN101547447B/en not_active Expired - Fee Related
Cited By (71)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9673904B2 (en) | 2009-02-03 | 2017-06-06 | Corning Optical Communications LLC | Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof |
| US9112611B2 (en) | 2009-02-03 | 2015-08-18 | Corning Optical Communications LLC | Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof |
| US10153841B2 (en) | 2009-02-03 | 2018-12-11 | Corning Optical Communications LLC | Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof |
| US9900097B2 (en) | 2009-02-03 | 2018-02-20 | Corning Optical Communications LLC | Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof |
| US10128951B2 (en) | 2009-02-03 | 2018-11-13 | Corning Optical Communications LLC | Optical fiber-based distributed antenna systems, components, and related methods for monitoring and configuring thereof |
| US9729238B2 (en) | 2009-11-13 | 2017-08-08 | Corning Optical Communications LLC | Radio-over-fiber (ROF) system for protocol-independent wired and/or wireless communication |
| US9485022B2 (en) | 2009-11-13 | 2016-11-01 | Corning Optical Communications LLC | Radio-over-fiber (ROF) system for protocol-independent wired and/or wireless communication |
| US9219879B2 (en) | 2009-11-13 | 2015-12-22 | Corning Optical Communications LLC | Radio-over-fiber (ROF) system for protocol-independent wired and/or wireless communication |
| CN101714907B (en) * | 2009-12-22 | 2013-01-23 | 北京邮电大学 | Passive optical network communication method, passive optical network communication system, optical network unit and optical line terminal |
| US9319138B2 (en) | 2010-02-15 | 2016-04-19 | Corning Optical Communications LLC | Dynamic cell bonding (DCB) for radio-over-fiber (RoF)-based networks and communication systems and related methods |
| US8831428B2 (en) | 2010-02-15 | 2014-09-09 | Corning Optical Communications LLC | Dynamic cell bonding (DCB) for radio-over-fiber (RoF)-based networks and communication systems and related methods |
| US11671914B2 (en) | 2010-10-13 | 2023-06-06 | Corning Optical Communications LLC | Power management for remote antenna units in distributed antenna systems |
| US10148347B2 (en) | 2011-04-29 | 2018-12-04 | Corning Optical Communications LLC | Systems, methods, and devices for increasing radio frequency (RF) power in distributed antenna systems |
| US9240835B2 (en) | 2011-04-29 | 2016-01-19 | Corning Optical Communications LLC | Systems, methods, and devices for increasing radio frequency (RF) power in distributed antenna systems |
| US9369222B2 (en) | 2011-04-29 | 2016-06-14 | Corning Optical Communications LLC | Determining propagation delay of communications in distributed antenna systems, and related components, systems, and methods |
| US9184843B2 (en) | 2011-04-29 | 2015-11-10 | Corning Optical Communications LLC | Determining propagation delay of communications in distributed antenna systems, and related components, systems, and methods |
| US9807722B2 (en) | 2011-04-29 | 2017-10-31 | Corning Optical Communications LLC | Determining propagation delay of communications in distributed antenna systems, and related components, systems, and methods |
| US9806797B2 (en) | 2011-04-29 | 2017-10-31 | Corning Optical Communications LLC | Systems, methods, and devices for increasing radio frequency (RF) power in distributed antenna systems |
| CN104081699B (en) * | 2012-01-08 | 2017-10-13 | 欧皮特维股份有限公司 | Optical profile formula antenna system |
| CN104081699A (en) * | 2012-01-08 | 2014-10-01 | 欧皮特维股份有限公司 | Optical distributed antenna system |
| CN104221293B (en) * | 2012-01-31 | 2017-02-22 | 大力系统有限公司 | System for routing signals in a distributed antenna system |
| US11057691B2 (en) | 2012-01-31 | 2021-07-06 | Dali Wireless, Inc. | Data transport in a virtualized distributed antenna system |
| US10051350B2 (en) | 2012-01-31 | 2018-08-14 | Dali Systems Co. Ltd. | Data transport in a virtualized distributed antenna system |
| US12302046B2 (en) | 2012-01-31 | 2025-05-13 | Dali Wireless, Inc. | Data transport in a virtualized distributed antenna system |
| US10721548B2 (en) | 2012-01-31 | 2020-07-21 | Dali Systems Co. Ltd. | Data transport in a virtualized distributed antenna system |
| US9621971B2 (en) | 2012-01-31 | 2017-04-11 | Dali Systems Co. Ltd. | Data transport in a virtualized distributed antenna system |
| CN104221293A (en) * | 2012-01-31 | 2014-12-17 | 大力系统有限公司 | Data Transmission in Virtualized Distributed Antenna System |
| US10931377B2 (en) | 2012-02-28 | 2021-02-23 | Dali Systems Co. Ltd. | Hybrid data transport for a virtualized distributed antenna system |
| US10063319B2 (en) | 2012-02-28 | 2018-08-28 | Dali Systems Co. Ltd. | Hybrid data transport for a virtualized distributed antenna system |
| US11336372B2 (en) | 2012-02-28 | 2022-05-17 | Dali Wireless, Inc. | Hybrid data transport for a virtualized distributed antenna system |
| US10349156B2 (en) | 2012-04-25 | 2019-07-09 | Corning Optical Communications LLC | Distributed antenna system architectures |
| US10136200B2 (en) | 2012-04-25 | 2018-11-20 | Corning Optical Communications LLC | Distributed antenna system architectures |
| US9973968B2 (en) | 2012-08-07 | 2018-05-15 | Corning Optical Communications Wireless Ltd | Distribution of time-division multiplexed (TDM) management services in a distributed antenna system, and related components, systems, and methods |
| US9621293B2 (en) | 2012-08-07 | 2017-04-11 | Corning Optical Communications Wireless Ltd | Distribution of time-division multiplexed (TDM) management services in a distributed antenna system, and related components, systems, and methods |
| US9455784B2 (en) | 2012-10-31 | 2016-09-27 | Corning Optical Communications Wireless Ltd | Deployable wireless infrastructures and methods of deploying wireless infrastructures |
| US10361782B2 (en) | 2012-11-30 | 2019-07-23 | Corning Optical Communications LLC | Cabling connectivity monitoring and verification |
| US9647758B2 (en) | 2012-11-30 | 2017-05-09 | Corning Optical Communications Wireless Ltd | Cabling connectivity monitoring and verification |
| US11792776B2 (en) | 2013-06-12 | 2023-10-17 | Corning Optical Communications LLC | Time-division duplexing (TDD) in distributed communications systems, including distributed antenna systems (DASs) |
| US9715157B2 (en) | 2013-06-12 | 2017-07-25 | Corning Optical Communications Wireless Ltd | Voltage controlled optical directional coupler |
| US11291001B2 (en) | 2013-06-12 | 2022-03-29 | Corning Optical Communications LLC | Time-division duplexing (TDD) in distributed communications systems, including distributed antenna systems (DASs) |
| US9974074B2 (en) | 2013-06-12 | 2018-05-15 | Corning Optical Communications Wireless Ltd | Time-division duplexing (TDD) in distributed communications systems, including distributed antenna systems (DASs) |
| US9526020B2 (en) | 2013-07-23 | 2016-12-20 | Corning Optical Communications Wireless Ltd | Monitoring non-supported wireless spectrum within coverage areas of distributed antenna systems (DASs) |
| US9967754B2 (en) | 2013-07-23 | 2018-05-08 | Corning Optical Communications Wireless Ltd | Monitoring non-supported wireless spectrum within coverage areas of distributed antenna systems (DASs) |
| US9247543B2 (en) | 2013-07-23 | 2016-01-26 | Corning Optical Communications Wireless Ltd | Monitoring non-supported wireless spectrum within coverage areas of distributed antenna systems (DASs) |
| US10292056B2 (en) | 2013-07-23 | 2019-05-14 | Corning Optical Communications LLC | Monitoring non-supported wireless spectrum within coverage areas of distributed antenna systems (DASs) |
| US9661781B2 (en) | 2013-07-31 | 2017-05-23 | Corning Optical Communications Wireless Ltd | Remote units for distributed communication systems and related installation methods and apparatuses |
| US9385810B2 (en) | 2013-09-30 | 2016-07-05 | Corning Optical Communications Wireless Ltd | Connection mapping in distributed communication systems |
| US9178635B2 (en) | 2014-01-03 | 2015-11-03 | Corning Optical Communications Wireless Ltd | Separation of communication signal sub-bands in distributed antenna systems (DASs) to reduce interference |
| US9775123B2 (en) | 2014-03-28 | 2017-09-26 | Corning Optical Communications Wireless Ltd. | Individualized gain control of uplink paths in remote units in a distributed antenna system (DAS) based on individual remote unit contribution to combined uplink power |
| US9807772B2 (en) | 2014-05-30 | 2017-10-31 | Corning Optical Communications Wireless Ltd. | Systems and methods for simultaneous sampling of serial digital data streams from multiple analog-to-digital converters (ADCs), including in distributed antenna systems |
| US9357551B2 (en) | 2014-05-30 | 2016-05-31 | Corning Optical Communications Wireless Ltd | Systems and methods for simultaneous sampling of serial digital data streams from multiple analog-to-digital converters (ADCS), including in distributed antenna systems |
| US10530480B2 (en) | 2014-08-25 | 2020-01-07 | Corning Optical Communications LLC | Supporting an add-on remote unit (RU) in an optical fiber-based distributed antenna system (DAS) over an existing optical fiber communications medium using radio frequency (RF) multiplexing |
| US10291322B2 (en) | 2014-08-25 | 2019-05-14 | Corning Optical Communications LLC | Supporting an add-on remote unit (RU) in an optical fiber-based distributed antenna system (DAS) over an existing optical fiber communications medium using radio frequency (RF) multiplexing |
| US10397929B2 (en) | 2014-08-29 | 2019-08-27 | Corning Optical Communications LLC | Individualized gain control of remote uplink band paths in a remote unit in a distributed antenna system (DAS), based on combined uplink power level in the remote unit |
| US9730228B2 (en) | 2014-08-29 | 2017-08-08 | Corning Optical Communications Wireless Ltd | Individualized gain control of remote uplink band paths in a remote unit in a distributed antenna system (DAS), based on combined uplink power level in the remote unit |
| US9929810B2 (en) | 2014-09-24 | 2018-03-27 | Corning Optical Communications Wireless Ltd | Flexible head-end chassis supporting automatic identification and interconnection of radio interface modules and optical interface modules in an optical fiber-based distributed antenna system (DAS) |
| US9602210B2 (en) | 2014-09-24 | 2017-03-21 | Corning Optical Communications Wireless Ltd | Flexible head-end chassis supporting automatic identification and interconnection of radio interface modules and optical interface modules in an optical fiber-based distributed antenna system (DAS) |
| US9420542B2 (en) | 2014-09-25 | 2016-08-16 | Corning Optical Communications Wireless Ltd | System-wide uplink band gain control in a distributed antenna system (DAS), based on per band gain control of remote uplink paths in remote units |
| US9788279B2 (en) | 2014-09-25 | 2017-10-10 | Corning Optical Communications Wireless Ltd | System-wide uplink band gain control in a distributed antenna system (DAS), based on per-band gain control of remote uplink paths in remote units |
| US10292114B2 (en) | 2015-02-19 | 2019-05-14 | Corning Optical Communications LLC | Offsetting unwanted downlink interference signals in an uplink path in a distributed antenna system (DAS) |
| US9807700B2 (en) | 2015-02-19 | 2017-10-31 | Corning Optical Communications Wireless Ltd | Offsetting unwanted downlink interference signals in an uplink path in a distributed antenna system (DAS) |
| US9681313B2 (en) | 2015-04-15 | 2017-06-13 | Corning Optical Communications Wireless Ltd | Optimizing remote antenna unit performance using an alternative data channel |
| US10009094B2 (en) | 2015-04-15 | 2018-06-26 | Corning Optical Communications Wireless Ltd | Optimizing remote antenna unit performance using an alternative data channel |
| US9948349B2 (en) | 2015-07-17 | 2018-04-17 | Corning Optical Communications Wireless Ltd | IOT automation and data collection system |
| US10560214B2 (en) | 2015-09-28 | 2020-02-11 | Corning Optical Communications LLC | Downlink and uplink communication path switching in a time-division duplex (TDD) distributed antenna system (DAS) |
| US10236924B2 (en) | 2016-03-31 | 2019-03-19 | Corning Optical Communications Wireless Ltd | Reducing out-of-channel noise in a wireless distribution system (WDS) |
| CN106936535A (en) * | 2017-03-10 | 2017-07-07 | 中国科学院半导体研究所 | A kind of optical wavelength associates tracking locking apparatus and method |
| CN114915342A (en) * | 2022-05-24 | 2022-08-16 | 网络通信与安全紫金山实验室 | Conversion device and signal conversion method for PON and Wi-Fi fusion |
| CN114915342B (en) * | 2022-05-24 | 2024-06-07 | 网络通信与安全紫金山实验室 | Conversion device and signal conversion method for PON and Wi-Fi integration |
| CN116381597A (en) * | 2023-05-29 | 2023-07-04 | 成都唯博星辰科技有限公司 | Broadband single-channel direction finding system and implementation method |
| CN116381597B (en) * | 2023-05-29 | 2023-08-25 | 成都唯博星辰科技有限公司 | Broadband single-channel direction finding system and implementation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101547447B (en) | 2010-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101547447B (en) | Broadband wireless signal coverage network based on passive optical network structure | |
| EP2180614B1 (en) | Optical line terminal, passive optical network and radio frequency signal transmission method | |
| US7127176B2 (en) | Optical transmission system of radio signal over optical fiber link | |
| US9401764B2 (en) | Optical network unit | |
| US20030161637A1 (en) | Bi-directional optical transmission system, and master and slave stations used therefor | |
| CN103401612B (en) | Based on the optical fiber of FTTH network and wireless mixed access system and hybrid access method | |
| US9124368B2 (en) | Transceiver for use in fibre network | |
| US7733825B2 (en) | ROF link apparatus capable of stable TDD wireless service | |
| US7668463B2 (en) | Method and apparatus for generating and transmitting WDM MWOF signals | |
| MXPA00005133A (en) | Novel module for radio transmission over optical fibre. | |
| Ruggeri et al. | A 5G fiber wireless 4Gb/s WDM fronthaul for flexible 360 coverage in V-band massive MIMO small cells | |
| US9419715B2 (en) | System and method for interoperating a radio-over-fiber based network in a fiber-to-the-home network | |
| JP2008067048A (en) | Wavelength conversion type wavelength division multiplexing transmission equipment | |
| Salgals et al. | Hybrid ARoF-WDM PON infrastructure for 5G millimeter-wave interface and broadband internet service | |
| EP2273699A1 (en) | A method for bidirectional transmission of signals, and a transceiver therefor | |
| KR100621331B1 (en) | Optical dispersion system with optical signal splitter | |
| CN117896007A (en) | Silicon photonics chip with integrated array antenna | |
| Kitayama et al. | Full-duplex demonstration of single electroabsorption transceiver basestation for mm-wave fiber-radio systems | |
| CN101431373A (en) | Signal processing method, junction centre, base station and network system | |
| Jemison et al. | Fiber radio: from links to networks | |
| Belkin et al. | Designing WDM-RoF Concept-Based Ful1-Duplex MMW Fiber Fronthaul Microcell Network | |
| Haddad et al. | Impairment-aware control plane for next generation radio-over-fiber access networks | |
| Cho | RoF for Indoor Network | |
| KR100619355B1 (en) | Multidrop Optical Repeater System for Wireless Communication | |
| CN102201871A (en) | ROF (radio-over-fiber) transmitter-receiver set and WDM (wavelength division multiplexing) ROF communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101208 |