CN1777071B - A channel coherence test method for smart antenna base station - Google Patents

Abstract

The invention discloses a channel coherence testing method for a smart antenna base station, which is used for testing multiple uplink channels or multiple downlink channels of the base station, including: using one channel as a reference channel and another channel as a test channel channel, close the rest of the channels; keep the weight of the reference channel unchanged, change the weight of the channel to be tested, make the combined in-band power minimum and use the minimum power in the band as the first power value, add the phase of the weight to Add or subtract 180° and record the synthetic in-band power value at this time as the second power value; judge the coherence between the channel to be measured and the reference channel according to the difference between the second and first power values; maintain the reference The channels remain unchanged, and the remaining channels are selected one by one as the channels to be tested, and the coherence between each channel to be tested and the reference channel is judged one by one according to the above method. The invention solves the problem in the prior art that there is no dedicated instrument for systematically testing the coherence between channels.

Description

A channel coherence test method for smart antenna base station

technical field

The invention relates to the coherence test of the array channel, in particular to the coherence test method of the array channel of the intelligent antenna base station system using a broadband transceiver.

Background technique

Smart antennas have begun to be used in commercial mobile base station systems, such as intelligent PCS (Personal Communications Services) base stations and TD-SCDMA (Time Division Synchronous Code Division Multiple Access) mobile base station systems using array antennas. Smart antenna is an optional technology in WCDMA (Wideband Code Division Multiple Access) and CDMA2000 (Qualcomm's Code Division Multiple Access standard), but it will become one of the mandatory technologies in 4G (fourth generation mobile communication system).

The coherence of the channel is an important index in the smart antenna base station. From the perspective of adaptive uplink reception alone, the coherence between channels is not important. However, the smart antenna base station of the beam switching type requires high coherence between channels, otherwise the beam with the expected direction and shape cannot be formed. Even for smart antennas with adaptive beams, if smart transmission is to be used in the downlink direction at the same time, both the uplink and downlink channels need to correct the channel amplitude and phase errors. Only when the coherence of the channel is ensured can the correction result be practical.

The most powerful way to guarantee coherence between channels is to share the same local oscillator for each channel. Although the coherence between the channels can be maintained theoretically by locking the individual local oscillators of each channel to the same clock source, practice has proved that this puts forward higher requirements for the phase noise index of the local oscillator. In the actual environment basically impossible to achieve.

The data received or transmitted by the base station will eventually undergo complex signal processing in the baseband, and the transmission method of the signal between the transceiver and the baseband is also related to whether the coherence between the channels can be maintained well.

There is no dedicated instrument to test the coherence between the channels of the system. Even if the existing instrument is used for indirect testing, it can only test the coherence of analog transceivers such as radio frequency and intermediate frequency. Sexual effects could not be tested.

Contents of the invention

The technical problem to be solved by the present invention is to provide a channel coherence test method for smart antenna base stations, which solves the problem in the prior art that there is no dedicated instrument for system coherence test between channels.

In order to achieve the above object, the present invention provides a channel coherence testing method for a smart antenna base station, which is used to test a plurality of uplink channels or a plurality of downlink channels of a base station array channel, which is characterized in that it includes: Step 1, with Any channel in the array channel is used as a reference channel, and another channel is used as a channel to be tested, and the remaining channels are closed; the weight of the reference channel is kept constant, and the weight of the channel to be tested is changed so that the channel to be tested and The combined in-band power of the reference channel is the minimum and the minimum value of the in-band power is used as the first power value, and the weight at this time is recorded as the first weight, and the phase of the first weight is added or subtracted by 180 ° and record the corresponding synthetic in-band power value as the second power value; if the difference between the second power value and the first power value is greater than the system predetermined coherence threshold, the channel to be tested and the reference channel The coherence between is satisfied; step 2, keep the reference channel unchanged, select the remaining channels one by one as the channel to be tested, and judge the coherence between each channel to be tested and the reference channel one by one according to the method in step 1 .

The above-mentioned channel coherence testing method for smart antenna base stations is characterized in that in the first step, the weights include amplitude weights and phase weights, and changing the weights of the channels to be tested is to first maintain the amplitude of the channels to be tested Gradually change the phase weight of the channel to be tested to obtain a minimum composite in-band power value, then maintain the phase weight of the channel to be tested at this time and gradually change the amplitude weight of the channel to be tested to obtain a minimum composite in-band power value, and use the obtained minimum combined in-band power value as the first power value.

The above-mentioned channel coherence testing method for smart antenna base stations is characterized in that it also includes step 3: according to the amplitude weight and phase weight obtained in step 1 and step 2, the beamforming weights of the base station are configured, so that the The multiple channels are working normally, and the outputs of the multiple channels are superimposed in phase, and the coherence between the multiple channels is further verified according to the superposition result.

The above-mentioned channel coherence testing method for a smart antenna base station is characterized in that the base station includes an operation and maintenance unit, a main control unit, a plurality of channel boards, a plurality of uplink channels and a plurality of downlink channels and a plurality of front ends; The operation and maintenance unit is connected to the multiple channel boards through the main control unit, and the multiple channel boards are connected to the multiple uplink channels and multiple downlink channels, and each of the front ends is connected to one uplink channel and one downlink channel. channel; and before the first step, it also includes the step of configuring the operating frequency of the base station through the control link composed of the operation and maintenance unit, the main control unit and the channel board.

The above-mentioned channel coherence testing method for the smart antenna base station is characterized in that, in the step 1, the channel is a downlink channel; the radio frequency output ports of the multiple front ends are respectively connected to the input of a power combiner The output port of the power combiner is connected to a transmitter tester through an attenuator, the transmitter tester works in the in-band power test mode, and the bandwidth and operating frequency are set to be the same as the base station .

The above-mentioned channel coherence testing method for the smart antenna base station is characterized in that, in the step 1, the channel is a downlink channel; multiple front ends of the base station are respectively connected with array antennas, and the transmitter tester Connected to the beacon antenna through a radio frequency cable, the beacon antenna is located at the geometric center of the circular array formed by the array antenna and parallel to the array antenna or the beacon antenna is located in the linear array formed by the array antenna line direction and meet the far-field requirements; the transmitter tester works in the in-band power test mode, and the bandwidth and operating frequency are set to be the same as those of the base station.

The above-mentioned channel coherence testing method for smart antenna base stations is characterized in that it also includes, using the operation and maintenance unit to connect with the transmitter tester through a general interface bus card and read the transmitter The in-band power output by the tester can realize the steps of automatically performing the coherence test of the downlink channel.

The above-mentioned channel coherence testing method for smart antenna base station is characterized in that, in said step 1, said channel is an uplink channel; said multiple front ends are respectively connected to the output port of a power splitter, said The input port of the power divider is connected to a signal source; the working frequency of the signal source is set to be the same as that of the base station, and the output signal of the signal source is set to be the same as the signal required by the base station.

The above-mentioned channel coherence testing method for the smart antenna base station is characterized in that, in the step 1, the channel is an uplink channel; a plurality of front ends of the base station are respectively connected with array antennas, and the signal source passes through a radio frequency cable Connected to the beacon antenna, the beacon antenna is located at the geometric center of the circular array composed of the array antennas and parallel to the array antennas or the beacon antenna is located in the normal direction of the linear array composed of the array antennas and Satisfying far-field requirements; the working frequency of the signal source is set to be the same as that of the base station, and the output signal of the signal source is set to be the same as the signal required by the base station.

The above-mentioned channel coherence testing method for the smart antenna base station is characterized in that, before the step 1, it also includes configuring the channel board to be in the test mode by the operation and maintenance unit, and configuring the base station to work in the receiving state Step: Also connect the operation and maintenance unit to the signal source and read the in-band power output by the channel board, so as to realize the automatic coherence test of the uplink channel.

Technical effect of the present invention is:

1) The coherence test of the uplink and downlink channels respectively uses the broadband power of the smart antenna base station to receive and transmit signals, which is more in line with the actual requirements of the broadband transceiver;

2) The entire channel of the base station (including radio frequency, baseband and transmission channel) is carried out in one package, which is simple and accurate;

3) It provides a powerful means for testing channel coherence in the process of smart antenna development and experimentation.

Description of drawings

Fig. 1 is a flow chart of the steps of the inventive method;

Fig. 2 is a schematic diagram of the composition of the smart antenna base station of the present invention;

Fig. 3 is the schematic diagram that the smart antenna base station of the present invention uses a power splitter to perform a downlink channel coherence test;

Fig. 4 is a schematic diagram of the smart antenna base station of the present invention using a power divider to perform an uplink channel coherence test;

Fig. 5 is a schematic diagram of a channel coherence test performed by a smart antenna base station using a beacon antenna according to the present invention.

Detailed ways

Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Fig. 1 is a flow chart of the steps of the inventive method; the channel coherence testing method for the smart antenna base station of the present invention, the main contents include:

Step 100, using any channel in the channels as a reference channel, another channel as a channel to be tested, and closing the remaining channels; keep the weight of the reference channel unchanged, and change the weight of the channel to be tested so that The combined in-band power of the measured channel and the reference channel is the minimum and the minimum value of the in-band power is used as the anti-phase superposition power value, and the weight at this time is recorded as the weight of the anti-phase superposition, and the weight of the anti-phase superposition The phase plus or minus 180° and record the synthesized in-band power value at this time as the in-phase superimposed power value; judge the channel to be tested and the coherence between reference channels;

Step 200, keep the reference channel unchanged, select the remaining channels one by one as the channels to be tested, and judge the coherence between each channel to be tested and the reference channel one by one according to the method in step 1.

Fig. 2 is a schematic diagram of the composition of the smart antenna base station according to the present invention. The smart antenna base station is composed of array antenna 11~1N, receiving front end 21~2N, receiving branch 31~3N, transmitting branch 41~4N, channel board 51~5M, main control unit 6, operation and maintenance unit 7, each channel The board is composed of an uplink baseband processing unit 511 , a downlink processing unit 522 , and a communication processor 533 . Complete down-conversion, filtering, amplification, A/D conversion, shaping filtering, uplink beamforming and other signal and signaling processing of received signals; and code modulation, beamforming, shaping filtering, up-conversion, power amplification of transmitted signals, etc. Function. The channel board has the function of calculating the uplink broadband power value in the test mode.

As shown in Figure 2, in the method of the present invention, the base station has an array antenna, and each array element of the array antenna is connected with a front end for duplexing and low noise amplification; each front end is respectively connected with a receiving branch and A transmitting branch; the receiving branch performs operations such as down-conversion, filtering, amplification, A/D conversion, and shaping filtering; the transmitting branch performs shaping filtering, D/A conversion, up-conversion, filter amplification, and power amplification and other operations; the base station also includes one or more channel boards and a main control unit; the channel boards are used for baseband signal processing of the uplink and downlink, including the beamforming function of the smart antenna, wherein the channel board is testing In this mode, the wideband receiving power of the selected beam can be calculated and uploaded; the main control unit performs the main control and signaling processing of the base station; the main control unit of the base station is connected to the local operation and maintenance system, and through the operation and maintenance system Perform base station parameter setting and channel coherence test operations; the method includes a broadband power measuring instrument such as a transmitter tester and a signal source such as ESG4437B.

Fig. 3 is a specific example of the coherence test of the downlink channel according to the present invention. In the figure, array antennas 11-1N are missing, but power combiner 9, attenuator 10, transmitter tester 11 and GPIB (general interface bus) card 12 are added. The local operation and maintenance unit directly reads the in-band power output by the transmitter tester through the GPIB card, so it can automatically perform the coherence test of the downlink channel with the cooperation of the test software.

The coherence testing method of the downlink channel (transmission channel), its basic idea is: take any channel in the N array channels, such as channel 1, as a reference, keep the weight of the reference channel unchanged, and change the weights of other channels , so that the combined in-band power of each other channel and the reference channel is minimized (anti-phase superimposition), record the weight value and the combined in-band power value at this time, add or subtract 180° to the phase of the obtained weight value and record Synthetic in-band power value at this time (in-phase superposition). The coherence between the channel to be measured and the reference channel is judged according to the in-band power difference during in-phase superposition and anti-phase superposition. Specific steps are as follows:

1) Connect the RF output ports of channel 1 to channel N to the input ports 1 to N of the power combiner respectively, and the output port of the power combiner is connected to the RF input port of the transmitter tester through the attenuator; or, through the RF cable Connect the input port of the transmitter tester to the beacon antenna. For a circular array, the position of the beacon antenna is located at the geometric center of the array, that is, the dot and parallel to the array antenna. For a linear array, it is located in front of the array (normal line best direction) and meet far-field requirements.

2) Configure the working frequency of the base station through the control link composed of the local operation and maintenance system, the main control unit and the channel board;

3) Set the power test instrument such as the transmitter tester (or spectrum analyzer, etc.) to work in the in-band power test mode, with the same bandwidth and operating frequency as the base station;

4) Configure the channel board to be in test mode through the local operation and maintenance system and start downlink transmission with a certain power (such as rated power or less);

The downlink beamforming weight of the channel board is configured through the local operation and maintenance system, so that the reference channel such as channel 1 and the channel to be tested such as channel 2 work normally, and the channels 3 to N to be tested are turned off for transmission. Weights are expressed in terms of magnitude (dB) and phase (°).

Keep the amplitude weight of channel 1 at a ₁ =0dB and the phase weight φ ₁ =0° unchanged;

Keep the amplitude weight of channel 2 at a ₂ =0dB, and change the phase weight of channel 2 with a certain granularity (such as 1°) in the range of 0-360° to minimize the composite broadband power output by channels 1 and 2, record At this time, the phase weight φ _{2, min} of channel 2;

Keep the phase weight of channel 2 as φ _2,min ; change the amplitude weight of channel 2 with a certain granularity (such as 0.5dB) within a certain range (such as ±10dB), so that the composite broadband power output by channels 1 and 2 is again Minimum, record the amplitude weight a _2,min and the synthetic broadband power P _min ¹² of channel 2 at this time;

(20dB门限为WCDMA系统的实验结果，其它系统根据带宽会有些不同)，则认为通道2与通道1的相干性得到满足。Keep the amplitude weight of channel 2 as a _{2, min} unchanged (a _{2, max} = a _{2, min} ), add or subtract 180° to the phase weight of channel 2, that is, φ _{2, max} = φ _{2, min} +180°, at this time, the broadband signals of channel 2 and the reference channel are superimposed in phase, and record the synthesized in-band power P _max ¹² at this time; compare the size of P _max ¹² and P _min ¹² , if

(The 20dB threshold is the experimental result of the WCDMA system, and other systems will be somewhat different according to the bandwidth), then it is considered that the coherence between channel 2 and channel 1 is satisfied.

5) Configure the downlink beamforming weight of the channel board through the local operation and maintenance system, so that the reference channel 1 and the channel 3 to be tested can work normally, and the channels 2, 4-N are turned off for transmission. Repeat the steps in 4) to measure the in-phase superimposed in-band power P _max ¹³ and anti-phase superimposed in-band power P _min ¹³ of channel 3 and the reference channel, and according to whether it satisfies Determine the coherence between channel 3 and channel 1.

6) The same method can measure the coherence between all N-1 channels to be tested and the reference;

7) Configure the base station beamforming weights according to the amplitude and phase weights obtained in the above steps, so that the array channels 1 to N can work normally, and their outputs are all superimposed in phase, then if the synthesized in-band power output by N channels satisfies P _total ≈( P _{sin gle} +201gN)dBm further proves that coherence is maintained between array channels 1-N.

Fig. 4 is a specific example of the uplink channel coherence test described in the present invention. In the figure, the array antennas 11-1N are missing, but the power divider 13 and the signal source 14 are added.

Among the present invention, carry out the coherence test method of uplink channel (receiving channel), comprise the following steps:

1) Connect the antenna connection ports of the uplink receiving channels 1~N of the array channel to the output ports 1~N of the power splitter respectively, and connect the input port of the power splitter to the RF port of the signal source; or, connect the signal source to the The RF output port of the radio is connected to the beacon antenna. The position of the beacon antenna is located in the geometric center of the array, that is, the dot, and is parallel to the array antenna for a circular array. For a linear array, it is located in front of the array (the normal direction is the best) and Meet the far-field requirements.

2) Configure the working frequency of the base station through the control link composed of the local operation and maintenance system, the main control unit and the channel board;

3) Set the working frequency of the signal source to be the same as that of the base station, and the output signal is the same as the signal required by the base station;

4) Configure the channel board in the test mode through the local operation and maintenance system, the base station works in the receiving state, and turn off the transmitter;

Configure the uplink beamforming weight of the channel board through the local operation and maintenance system, so that the reference channel such as channel 1 and the channel to be tested such as channel 2 work normally, and the channels 3 to N to be tested stop receiving. Weights are expressed in terms of magnitude (dB) and phase (°).

Keep the amplitude weight of channel 1 at a ₁ =0dB and the phase weight φ ₁ =0° unchanged;

Keep the amplitude weight of channel 2 at a ₂ = 0dB, change the phase weight of channel 2 continuously with a certain granularity (such as 1°) within the range of 0-360° and upload the combined power value calculated by the channel board, so that channel 1 and 2 The synthesized broadband power output is the minimum, record the phase weight φ _2,min of channel 2 at this time;

Keep the phase weight of channel 2 as φ _{2, min} , change the amplitude weight of channel 2 within a certain range (such as ±10dB) with a certain granularity (such as 0.5dB) and upload the combined power value calculated by the channel board to make channel 1 The synthesized broadband power output by sum 2 is the minimum again, record the amplitude weight a _2,min and synthesized broadband power P _min ¹² of channel 2 at this time;

(20dB门限为WCDMA系统的实验结果，其它系统根据带宽会有些不同)，则认为通道2与通道1的相干性得到满足。Keep the amplitude weight of channel 2 as a _{2, min} unchanged (a _{2, max} = a _{2, min} ), add or subtract 180° to the phase weight of channel 2, that is, φ _{2, max} = φ _{2, min} +180°, at this time, the broadband signals of channel 2 and the reference channel are superimposed in phase, and record the synthesized in-band power P _max ¹² at this time; compare the size of P _max ¹² and P _min ¹² , if

(The 20dB threshold is the experimental result of the WCDMA system, and other systems will be somewhat different according to the bandwidth), then it is considered that the coherence between channel 2 and channel 1 is satisfied.

5) Configure the uplink beamforming weight of the channel board through the local operation and maintenance system, so that the reference channel 1 and the channel 3 to be tested can work normally, and channels 2, 4 to N are turned off for reception. Repeat the steps in 4) to measure the in-phase superimposed in-band power P _max ¹³ and anti-phase superimposed in-band power P _min ¹³ of channel 3 and the reference channel, and according to whether it satisfies Determine the coherence between channel 3 and channel 1.

6) The same method can measure the coherence between all N-1 channels to be tested and the reference;

7) Configure the base station beamforming weights according to the amplitude and phase weights obtained in the above steps, so that the array channels 1 to N can work normally, and their outputs are all superimposed in phase, then if the synthesized in-band power output by N channels satisfies P _total ≈( P _{sin gle} +201gN)dBm further proves that coherence is maintained between array channels 1-N.

Fig. 5 is another specific example of the coherence test of the downlink channel or uplink channel according to the present invention. The configuration of the smart antenna base station in the figure is complete, and a transmitter tester 11, a GPIB card 12 and a beacon antenna 15 are added to the test system. The position of the beacon antenna is located in the geometric center of the array, that is, the dot, and parallel to the array antenna for the circular array, and is located in the normal direction in front of the array for the linear array and meets the far-field requirements. When performing an uplink channel coherence test, the transmitter tester 11 in FIG. 5 is replaced by a signal source 14, and the GPIB card 12 can also be eliminated.

As can be seen from the above, the present invention can achieve the following beneficial effects:

1) The coherence test of the uplink and downlink channels respectively uses the broadband power of the smart antenna base station to receive and transmit signals, which is more in line with the requirements of broadband transceivers;

2) The entire channel of the base station (including radio frequency, baseband and transmission channel) is carried out in one package, which is simple and accurate;

3) It provides a powerful means for testing channel coherence in the process of smart antenna development and experimentation.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the implementation scope of the present invention; all equivalent changes and modifications made according to the present invention are covered by the patent scope of the present invention.

Claims (9)

1. passage coherence method of testing that is used for intelligent antenna base station is used for a plurality of data feedback channels or a plurality of down going channel of testing base station array channel, it is characterized in that, comprising:

Step 1, as the benchmark passage, another passage is closed remaining passage as passage to be measured with the arbitrary passage in the described array channel; Keep the weights of benchmark passage constant, change the weights of passage to be measured, make the anamorphic zone internal power minimum of passage to be measured and benchmark passage and should be with the internal power minimum value as first performance number, the weights of writing down this moment are as first weights, and the phase place of described first weights is added or deduct the corresponding anamorphic zone internal power values of 180 ° and record as second performance number; If the difference of described second performance number and first performance number is greater than the predetermined coherence's thresholding of system, the coherence between then described passage to be measured and the described benchmark passage is met;

Step 2 keeps the benchmark passage constant, chooses remaining passage one by one as passage to be measured, judges coherence between each passage to be measured and the described benchmark passage one by one according to the mode in the step 1;

Wherein, in the described step 1, described weights comprise amplitude power and phase place power, the weights that change passage to be measured are the amplitude power that keeps passage to be measured earlier, the phase place power that progressively changes passage to be measured obtains the anamorphic zone internal power value of a minimum, keep then this moment passage to be measured phase place power and progressively change the amplitude power of passage to be measured, obtain the anamorphic zone internal power value of a minimum once more, and with the anamorphic zone internal power value of this minimum that obtains once more as described first performance number.

2. the passage coherence method of testing that is used for intelligent antenna base station according to claim 1, it is characterized in that, also comprise step 3: the wave beam according to amplitude power that obtains in step 1 and the step 2 and the described base station of phase place power configuration forms weights, make all operate as normal of described a plurality of passage, and with the output of superimposed described a plurality of passages, according to the coherence between the described a plurality of passages of the further checking of stack result.

3. the passage coherence method of testing that is used for intelligent antenna base station according to claim 2 is characterized in that described base station comprises Operation and Maintenance Unit, main control unit, a plurality of channel board, a plurality of data feedback channel and a plurality of down going channel and a plurality of front end; Described Operation and Maintenance Unit connects described a plurality of channel board by described main control unit, and described a plurality of channel boards connect described a plurality of data feedback channel and a plurality of down going channel, a corresponding data feedback channel and the down going channel of connecting of each described front end; And the step that before described step 1, also comprises the working frequency points of the described base station of forming by described Operation and Maintenance Unit, main control unit and channel board of control link configuration.

4. the passage coherence method of testing that is used for intelligent antenna base station according to claim 3 is characterized in that in described step 1, described passage is a down going channel; The radio frequency delivery outlet of described a plurality of front ends is connected to the input port of a power combiner respectively, the delivery outlet of described power combiner connects a sender tester by an attenuator, described sender tester is operated in band internal power test pattern, and bandwidth is set to identical with described base station with working frequency points.

5. the passage coherence method of testing that is used for intelligent antenna base station according to claim 3 is characterized in that in described step 1, described passage is a down going channel; A plurality of front ends of described base station are connected with array antenna respectively, the sender tester links to each other with beacon antenna by radio frequency cable, and described beacon antenna is positioned at the geometric center of the ring array that described array antenna forms and parallel or described beacon antenna with described array antenna and is positioned at the normal direction of the line array that described array antenna forms and satisfies the far field requirement; Described sender tester is operated in band internal power test pattern, and bandwidth is set to identical with described base station with working frequency points.

6. according to claim 4 or the 5 described passage coherence method of testings that are used for intelligent antenna base station, it is characterized in that, also comprise, utilize described Operation and Maintenance Unit to be connected with described sender tester and read the band internal power of described sender tester output, thereby realize carrying out automatically the step of down going channel coherence test by a general-purpose interface bus card.

7. the passage coherence method of testing that is used for intelligent antenna base station according to claim 3 is characterized in that in described step 1, described passage is a data feedback channel; Described a plurality of front end is connected to the delivery outlet of a power splitter respectively, and the input port of described power splitter connects a signal source; It is identical with the working frequency points of described base station that the working frequency points of described signal source is set to, and it is identical with the signal of described base station requirement that the output signal of described signal source is set to.

8. the passage coherence method of testing that is used for intelligent antenna base station according to claim 3 is characterized in that in described step 1, described passage is a data feedback channel; A plurality of front ends of described base station are connected with array antenna respectively, signal source links to each other with beacon antenna by radio frequency cable, and described beacon antenna is positioned at the geometric center of the ring array that described array antenna forms and parallel or described beacon antenna with described array antenna and is positioned at the normal direction of the line array that described array antenna forms and satisfies the far field requirement; It is identical with the working frequency points of described base station that the working frequency points of described signal source is set to, and it is identical with the signal of described base station requirement that the output signal of described signal source is set to.

9. according to claim 7 or the 8 described passage coherence method of testings that are used for intelligent antenna base station, it is characterized in that, comprised also that before described step 1 disposing described channel board by described Operation and Maintenance Unit is in test pattern, disposes the step that described base station works in accepting state; Also be connected and read the band internal power of described channel board output with described signal source, thereby realize carrying out automatically data feedback channel coherence test by described Operation and Maintenance Unit.

Images