CN1458752A - Light carrier frequence division multiplex transmission system - Google Patents
Light carrier frequence division multiplex transmission system Download PDFInfo
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- CN1458752A CN1458752A CN03137799A CN03137799A CN1458752A CN 1458752 A CN1458752 A CN 1458752A CN 03137799 A CN03137799 A CN 03137799A CN 03137799 A CN03137799 A CN 03137799A CN 1458752 A CN1458752 A CN 1458752A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims abstract description 11
- 239000013307 optical fiber Substances 0.000 claims abstract description 11
- 238000010295 mobile communication Methods 0.000 claims abstract description 3
- 238000005516 engineering process Methods 0.000 claims abstract 3
- 238000000034 method Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 2
- 239000000969 carrier Substances 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 description 6
- 229940047812 adderall Drugs 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
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Abstract
本发明属光通信技术和无线通信相结合的领域。本发明的主要用途是为提供一种宽带宽、低成本和便于扩容的传输方案。本发明的目的是实现大带宽、低成本和便于扩容的传输方案。本发明为移动通信和智能通信等通信系统提供一种传输方案：在一根或几根光纤上同时传输不同频率的射频信号(也可以不同频率的中频信号)，也就是说在光纤上实现频分复用。从而利用频分复用的原理实现光纤的利用率实现低成本、易扩容和大带宽。这种方案也为接入网技术提供了一种可参考的模型。The invention belongs to the field of combining optical communication technology and wireless communication. The main purpose of the invention is to provide a transmission solution with wide bandwidth, low cost and easy capacity expansion. The purpose of the invention is to realize a transmission solution with large bandwidth, low cost and easy capacity expansion. The present invention provides a transmission scheme for communication systems such as mobile communication and intelligent communication: transmit radio frequency signals of different frequencies (or intermediate frequency signals of different frequencies) on one or several optical fibers at the same time, that is to say, realize frequency signals on optical fibers. Multiplexing. Therefore, the principle of frequency division multiplexing is used to realize the utilization rate of the optical fiber to realize low cost, easy expansion and large bandwidth. This solution also provides a reference model for access network technology.
Description
The invention belongs to optical communication technique and wireless communication field.
Main application of the present invention provides a kind of wide bandwidth, low cost and is convenient to the transmission plan of dilatation.
Along with the favor of user to data business and IN service, and the user thirst for again being under no restraint-as move, the restriction of place or bandwidth, this all makes big bandwidth, low cost and the easy transmission of dilatation and the access scheme technical difficult points that becomes the research focus and need solution for the service of expanding flexibly.The present invention is directed to this problem and proposed a kind of scheme, it has not only realized big bandwidth technically, has also possessed easily dilatation and characteristic cheaply flexibly simultaneously.
Principle of the present invention: according to the bus type topological structure of computer science, utilize the frequency division multiplexing principle to realize having the seemingly transmission plan of bus type topological structure, improve the utilance of optical fiber like this, and made the transmission signals peak-to-average ratio ratio of signal time average power (the signal transient peak value with) also improve.This frequency division multiplexing is different with wavelength division multiplexing: frequency division multiplexing of the present invention is meant signal multiplexing under electric territory, and wavelength division multiplexing is meant multiplexing under the light territory; And this frequency division multiplexing can be modulated on the same optical wavelength, also can be modulated on the different optical wavelengths, but wavelength division multiplexing must be multiplexing between the different optical wavelengths.
Below in conjunction with accompanying drawing, describe the flow process that this topological structure is applied to mobile communication or intelligent communication system in detail:
(1) descending scheme
As scheme shown in the l f
1, f
2And f
nBe frequency division multiplexing carrier frequency, f
cBe the system communication carrier frequency, DATAl, DATA2 and DATAn are pre-transmission signals (can be baseband signals, intermediate-freuqncy signal or radiofrequency signal),
Be adder,
Be electrical to optical converter (or opto-electronic conversion array),
Be optical-electrical converter, coupler is a coupler, and is multiplier (one comes into operation goes up the low-converter realization),
Be band filter.
System passes to upconverter to pre-transmitting data stream DATAx respectively, and upconverter is carried out up-conversion to corresponding data, by adder all signals is carried out addition.Become light signal through electrical to optical converter then, and in optical fiber, transmit, in the process of frequency conversion, need to satisfy each road signal and do not disturb (shared frequency band is non-intersect) each other.Through after the Optical Fiber Transmission, be coupled out the 1/n luminous power at far-end by coupler, and obtain the up-conversion signal that will send by optical-electrical converter and band pass filter, be modulated to radio frequency at last and give antenna and send.(2) up scheme
As shown in Figure 2, wherein Filter Array is a filter array.In fact, up scheme is the inverse process of descending scheme: the signal of telecommunication that day bundle of lines receives carries out light modulation through after the down-conversion.Then, be coupled in the optical fiber and go.Through the optical-electrical converter of Optical Fiber Transmission, revert to the signal of telecommunication to the opposite end.Filtering goes out desired signal through filter array again, and frequency conversion again recovers final signal at last.Annotate:
1, in fact, disturb (transmitting-receiving is disturbed, and faces interference frequently etc.), between frequency converter and antenna, generally add filter for minimizing.
2, adopt same optical wavelength transmission herein.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03137799A CN1458752A (en) | 2003-06-25 | 2003-06-25 | Light carrier frequence division multiplex transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03137799A CN1458752A (en) | 2003-06-25 | 2003-06-25 | Light carrier frequence division multiplex transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1458752A true CN1458752A (en) | 2003-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN03137799A Pending CN1458752A (en) | 2003-06-25 | 2003-06-25 | Light carrier frequence division multiplex transmission system |
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| CN (1) | CN1458752A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005071869A1 (en) * | 2004-01-15 | 2005-08-04 | Huawei Technologies Co., Ltd. | A method, equipment and system for optical communication |
| CN100433834C (en) * | 2006-01-04 | 2008-11-12 | 天津大学 | Multi-point video transmitting system with single optical fiber |
| CN105227235A (en) * | 2015-09-07 | 2016-01-06 | 北京奥普泰克科技有限责任公司 | The full duplex optical communication system that carrier frequency is different |
-
2003
- 2003-06-25 CN CN03137799A patent/CN1458752A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005071869A1 (en) * | 2004-01-15 | 2005-08-04 | Huawei Technologies Co., Ltd. | A method, equipment and system for optical communication |
| CN100486135C (en) * | 2004-01-15 | 2009-05-06 | 华为技术有限公司 | Method, device and system for optical communication |
| CN100433834C (en) * | 2006-01-04 | 2008-11-12 | 天津大学 | Multi-point video transmitting system with single optical fiber |
| CN105227235A (en) * | 2015-09-07 | 2016-01-06 | 北京奥普泰克科技有限责任公司 | The full duplex optical communication system that carrier frequency is different |
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| C06 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |