CN115149985B - Multi-phase self-adaptive multi-beam forming system and method - Google Patents
Multi-phase self-adaptive multi-beam forming system and method Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The application discloses a multiphase self-adaptive multi-beam forming system and a method, wherein the system comprises a transmitting assembly, a receiving assembly and a baseband processor; the baseband processor is used for generating 32 paths of transmitting beam data to be transmitted to the transmitting assembly, or receiving and storing the 32 paths of receiving beam data from the receiving assembly; the emission component comprises an emission preprocessing module and an emission signal output module, and the emission preprocessing module comprises 32 paths of emission preprocessing channels; the emission signal output module comprises 64 paths of emission signal output channels; the receiving assembly comprises a receiving front-end module and a receiving signal output module; the receiving front-end module comprises 64 paths of receiving front-end channels; the received signal output module comprises 32 paths of received signal output channels. The application can realize the function of receiving and transmitting multiple beams of input signals with multiple rates under the same hardware architecture, and can be compatible with input signals with multiple sampling frequencies.
Description
Technical Field
The present application relates to adaptive multi-beam, and more particularly, to a multi-phase adaptive multi-beam forming system and method.
Background
When the sampling rate of the array signal exceeds the frequency of the processing clock, flexible and accurate signal sampling is difficult to perform, and the formation of the digital beam brings a plurality of inconveniences.
Particularly, the multi-beam receiving and transmitting functions are completed for the input signals with various rates under the same hardware architecture, so that the multi-beam receiving and transmitting device can be compatible with the input signals with various sampling frequencies and is difficult to be compatible with the input signals with various sampling frequencies.
Disclosure of Invention
The application aims to overcome the defects of the prior art, and provides a multiphase self-adaptive multi-beam forming system and a multiphase self-adaptive multi-beam forming method, which can realize the function of receiving and transmitting multi-beams for input signals with various rates under the same hardware architecture, can be compatible with input signals with various sampling frequencies, can meet the condition of 2N times of chip clock rate, and can realize the DBF (digital beam forming) of the multi-beams under the condition of multiple array elements.
The aim of the application is realized by the following technical scheme: a multiphase adaptive multi-beam forming system comprising a transmit assembly, a receive assembly, and a baseband processor;
the baseband processor is used for generating 32 paths of transmitting beam data to be transmitted to the transmitting assembly, or receiving and storing 32 paths of receiving beam data from the receiving assembly;
the emission component comprises an emission preprocessing module and an emission signal output module, and the emission preprocessing module comprises 32 paths of emission preprocessing channels; the emission signal output module comprises 64 paths of emission signal output channels; each path of emission preprocessing channel corresponds to one path of emission beam data and is used for carrying out interpolation and time delay filtering on the corresponding emission beam data, and then the emission beam data is divided into 64 paths through a first power divider and transmitted to an emission signal output module; in the transmission signal output module, the ith transmission signal output channel corresponds to the ith output of the first power divider, i=1, 2, …,64; the ith transmission signal output channel respectively weights the ith output of the first power divider in each transmission pretreatment channel, and then synthesizes the ith output into one channel through a first adder, and then carries out equalization, interpolation and up-conversion and then outputs the output outwards; since there are 64 transmission signal output channels in total, the transmission assembly outputs 64 signals in total;
the receiving assembly comprises a receiving front-end module and a receiving signal output module; the receiving front-end module comprises 64 paths of receiving front-end channels; after each channel of receiving front-end channel performs down-conversion, extraction and equalization on the received signals, dividing the obtained signals into 32 channels through a second power divider and transmitting the 32 channels to a receiving signal output module; the receiving signal output module comprises 32 paths of receiving signal output channels, and in the receiving signal output module, the j-th path of receiving signal output channel corresponds to the j-th path of output of the second power divider; j=1, 2, …,32; the j-th channel of the receiving signal output channel weights the j-th channel of the second power divider in each receiving front-end channel respectively, combines the j-th channel of the receiving front-end channel into one channel through a second adder, and then carries out time delay filtering and extraction to obtain receiving beam data and transmits the receiving beam data to a baseband processor; since there are 32 received signal output channels in total, the baseband processor receives 32 signals in total.
Further, each of the emission preprocessing channels includes a first interpolation module, a first delay filtering module, and a first power divider of 1:64;
the first interpolation module is used for receiving one path of data from the baseband signal processor, the output end of the first interpolation module is connected with the first power divider through the first delay filtering module, and the first power divider is respectively connected with each path of transmitting signal output channel.
Further, each of the transmit signal output channels includes an up-conversion module, a second interpolation module, a first equalizer, a first adder, and a first weighting module;
for the ith transmitting signal receiving channel, a first weighting module is used for respectively weighting the ith output of a first power divider in each transmitting pretreatment channel, then synthesizing the weighted output data through a first adder, and outputting the signal output by the first adder through a first equalizer, a second interpolation module and an up-conversion module;
in the ith transmitting signal receiving channel, the first weighting module comprises a plurality of first weighting units, and the first weighting units are the same as the transmitting preprocessing channels in number and correspond to each other one by one; the first input of each first weighting unit is the ith output of the corresponding first power divider in the transmission preprocessing channel, and the second input is a preset transmission weighting coefficient; the outputs of the first weighting units are connected with a first adder.
Further, each of the receiving front-end channels includes a down-conversion module, a first extraction module, a second equalization module, and a second power divider of 1:32;
in each receiving front-end module, the received data are sequentially transmitted to a second power divider through a down-conversion module and a first extraction module, and the output end of the second power divider is respectively connected with each receiving signal output module.
Further, each received signal output channel comprises a second extraction module, a second delay filtering module, a second adder and a second weighting module;
in the j-th receiving signal output channel, the second weighting module is used for respectively weighting the j-th output of the second power divider in each receiving front-end channel, synthesizing the weighted output data through a second adder, and transmitting the output end of the second adder to the baseband processor after sequentially passing through the second delay filtering module and the second extracting module;
in the j-th receiving signal output channel, the second weighting module comprises a plurality of second weighting units, the second weighting units are the same as the number of the receiving front-end channels and are in one-to-one correspondence, the first input of each second weighting unit is the j-th output of the corresponding second power divider in the receiving front-end channel, the second input is a preconfigured receiving weighting coefficient, and the output ends of the second weighting units are all connected with a second adder.
A multiphase adaptive multi-beam forming method comprises a transmitting beam forming step S1 and a receiving beam forming step S2;
the transmit beamforming step S1 includes:
the baseband processor is used for generating 32 paths of transmission beam data and transmitting the 32 paths of transmission beam data to the transmission component;
each path of emission preprocessing channel in the emission component receives the emission beam data of the baseband processor, carries out interpolation and time delay filtering, and then is divided into 64 paths through the first power divider to be transmitted to the emission signal output module;
in the transmission signal output module, the ith transmission signal output channel corresponds to the ith output of the first power divider, i=1, 2, …,64; the ith transmission signal output channel respectively weights the ith output of the first power divider in each transmission pretreatment channel, and then synthesizes the ith output into one channel through a first adder, and then carries out equalization, interpolation and up-conversion and then outputs the output outwards; since there are 64 transmission signal output channels in total, the transmission assembly outputs 64 signals in total;
the receiving beam forming step S2 includes:
after each channel of receiving front-end channel performs down-conversion, extraction and equalization on the received signals, dividing the obtained signals into 32 channels through a second power divider and transmitting the 32 channels to a receiving signal output module;
in the receiving signal output module, the jth path of receiving signal output channel corresponds to the jth path of output of the second power divider; j=1, 2, …,32; the j-th channel of the receiving signal output channel weights the j-th channel of the second power divider in each receiving front-end channel respectively, combines the j-th channel of the receiving front-end channel into one channel through a second adder, and then carries out time delay filtering and extraction to obtain receiving beam data and transmits the receiving beam data to a baseband processor; since there are 32 received signal output channels in total, the baseband processor receives 32 signals in total.
The beneficial effects of the application are as follows: the application can realize the function of receiving and transmitting multiple beams of input signals with multiple rates under the same hardware architecture, can be compatible with input signals with multiple sampling frequencies, and can realize the digital receiving DBF of multiple beams under the condition of multiple array elements while the sampling frequency is required to meet the condition of 2N times of the clock rate of the chip.
Drawings
FIG. 1 is a schematic diagram of the system principle of the present application;
FIG. 2 is a schematic diagram of chip input and output;
FIG. 3 is a diagram of a chip receive data processing architecture;
fig. 4 is a diagram of a chip emission data processing architecture.
Detailed Description
The technical solution of the present application will be described in further detail with reference to the accompanying drawings, but the scope of the present application is not limited to the following description.
As shown in fig. 1, a multi-phase adaptive multi-beam forming system includes a transmitting component, a receiving component, and a baseband processor;
the baseband processor is used for generating 32 paths of transmitting beam data to be transmitted to the transmitting assembly, or receiving and storing 32 paths of receiving beam data from the receiving assembly;
the emission component comprises an emission preprocessing module and an emission signal output module, and the emission preprocessing module comprises 32 paths of emission preprocessing channels; the emission signal output module comprises 64 paths of emission signal output channels; each path of emission preprocessing channel corresponds to one path of emission beam data and is used for carrying out interpolation and time delay filtering on the corresponding emission beam data, and then the emission beam data is divided into 64 paths through a first power divider and transmitted to an emission signal output module; in the transmission signal output module, the ith transmission signal output channel corresponds to the ith output of the first power divider, i=1, 2, …,64; the ith transmission signal output channel respectively weights the ith output of the first power divider in each transmission pretreatment channel, and then synthesizes the ith output into one channel through a first adder, and then carries out equalization, interpolation and up-conversion and then outputs the output outwards; since there are 64 transmission signal output channels in total, the transmission assembly outputs 64 signals in total;
the receiving assembly comprises a receiving front-end module and a receiving signal output module; the receiving front-end module comprises 64 paths of receiving front-end channels; after each channel of receiving front-end channel performs down-conversion, extraction and equalization on the received signals, dividing the obtained signals into 32 channels through a second power divider and transmitting the 32 channels to a receiving signal output module; the receiving signal output module comprises 32 paths of receiving signal output channels, and in the receiving signal output module, the j-th path of receiving signal output channel corresponds to the j-th path of output of the second power divider; j=1, 2, …,32; the j-th channel of the receiving signal output channel weights the j-th channel of the second power divider in each receiving front-end channel respectively, combines the j-th channel of the receiving front-end channel into one channel through a second adder, and then carries out time delay filtering and extraction to obtain receiving beam data and transmits the receiving beam data to a baseband processor; since there are 32 received signal output channels in total, the baseband processor receives 32 signals in total.
A multiphase adaptive multi-beam forming method comprises a transmitting beam forming step S1 and a receiving beam forming step S2;
the transmit beamforming step S1 includes:
the baseband processor is used for generating 32 paths of transmission beam data and transmitting the 32 paths of transmission beam data to the transmission component;
each path of emission preprocessing channel in the emission component receives the emission beam data of the baseband processor, carries out interpolation and time delay filtering, and then is divided into 64 paths through the first power divider to be transmitted to the emission signal output module;
in the transmission signal output module, the ith transmission signal output channel corresponds to the ith output of the first power divider, i=1, 2, …,64; the ith transmission signal output channel respectively weights the ith output of the first power divider in each transmission pretreatment channel, and then synthesizes the ith output into one channel through a first adder, and then carries out equalization, interpolation and up-conversion and then outputs the output outwards; since there are 64 transmission signal output channels in total, the transmission assembly outputs 64 signals in total;
the receiving beam forming step S2 includes:
after each channel of receiving front-end channel performs down-conversion, extraction and equalization on the received signals, dividing the obtained signals into 32 channels through a second power divider and transmitting the 32 channels to a receiving signal output module;
in the receiving signal output module, the jth path of receiving signal output channel corresponds to the jth path of output of the second power divider; j=1, 2, …,32; the j-th channel of the receiving signal output channel weights the j-th channel of the second power divider in each receiving front-end channel respectively, combines the j-th channel of the receiving front-end channel into one channel through a second adder, and then carries out time delay filtering and extraction to obtain receiving beam data and transmits the receiving beam data to a baseband processor; since there are 32 received signal output channels in total, the baseband processor receives 32 signals in total.
In the embodiment of the application, the transmitting component and the receiving component can be integrated into the same chip, as shown in fig. 2, the chip architecture supports simultaneous processing of receiving and transmitting, multiphase selection and bypass control are controlled by control parameters, and configuration item parameters required inside the chip are configured by a configuration parameter input port during power-on/reset of the chip. The control parameters and configuration parameters are shown in the following table:
table 1 control parameter table
Table 2 configuration parameter table
Under the effect of the control parameters, the chip operates in different modes, and the following describes a specific implementation of the beam forming chip architecture from reception and transmission, respectively.
And (3) receiving: as shown in fig. 3, the multi-channel array element level received data enters the chip through the input port, and is subjected to down-conversion, extraction, equalization, weighted synthesis, delay filtering and extraction under the action of the control parameters to obtain multi-channel multi-beam data output.
Each functional module has a multiphase processing function. The down-conversion module realizes multiphase processing by changing down-conversion primary phases; the extraction, equalization, delay filtering and extraction realize multiphase processing through a multiphase FIR filter structure, and the filter coefficients of the multiphase FIR filter structure need to be externally configured according to multiphase conditions. The second decimation module adopts a half-band filter structure.
Transmitting: as shown in fig. 4, the multi-beam emission data enters the chip through the input port, and under the action of the control parameters, array element level data is obtained through interpolation, time delay filtering, branching weighted synthesis, equalization, interpolation and up-conversion, and then is output through multiple channels.
Each functional module has a multiphase processing function. The up-conversion module realizes multiphase processing by changing the up-conversion primary phase; interpolation, equalization, delay filtering and interpolation implement polyphase processing by polyphase FIR filter structures, whose filter coefficients need to be externally configured according to polyphase conditions. The first interpolation module adopts a half-band filter structure.
In an alternative embodiment, taking a 2-phase real signal of 32 array elements/16 wave beams as an example, the input end of the receiving link is 64 channels, the output end of the receiving link is 32 channels, the input end of the transmitting link is 32 channels, and the output end of the transmitting link is 64 channels. The array elements consider two 4*4 square arrays, the array element spacing is 8mm, and the subarray spacing is 100mm. Assuming that the channel is an ideal channel, there is no amplitude or phase distortion to the signal.
The chip control parameter configuration is shown in the following table:
table 3 control parameter configuration table
| Control parameter name | sPath | sType | enEq | enDly | enBeamEx |
| Value taking | 2 | 1 | 0 | 1 | 0 |
The half-band filter coefficients are configured to:
TABLE 4 half-band filter coefficient configuration
| HbfCoe 1/12 | HbfCoe 2/11 | HbfCoe3/10 | HbfCoe4/9 | HbfCoe5/8 | HbfCoe6/7 | HbfCoe13 |
| -0.0127 | -0.0303 | -0.0988 | 0.3158 | 0.0521 | 0.0175 | 0.5 |
The weighting coefficient and the delay coefficient are obtained through the calculation of the array element coordinates and the beam pointing, and it is noted that because the embodiment is 2-phase signals, when the weighting coefficient is configured, the odd terms and even terms of the down LinkDBFCoe and the up LinkDBFCoe are the same, and the odd terms and the even terms are the weighting coefficients of the corresponding array elements; similarly, when the delay address parameters are configured, the odd terms and the even terms of the DlfAdd are the same, and are the delay address parameters of the corresponding beams.
While the foregoing description illustrates and describes a preferred embodiment of the present application, it is to be understood that the application is not limited to the form disclosed herein, but is not to be construed as limited to other embodiments, but is capable of use in various other combinations, modifications and environments and is capable of changes or modifications within the spirit of the application described herein, either as a result of the foregoing teachings or as a result of the knowledge or skill of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the application are intended to be within the scope of the appended claims.
Claims (6)
1. A multi-phase adaptive multi-beam forming system, characterized by: the device comprises a transmitting component, a receiving component and a baseband processor;
the baseband processor is used for generating 32 paths of transmitting beam data to be transmitted to the transmitting assembly, or receiving and storing 32 paths of receiving beam data from the receiving assembly;
the emission component comprises an emission preprocessing module and an emission signal output module, and the emission preprocessing module comprises 32 paths of emission preprocessing channels; the emission signal output module comprises 64 paths of emission signal output channels; each path of emission preprocessing channel corresponds to one path of emission beam data and is used for carrying out interpolation and time delay filtering on the corresponding emission beam data, and then the emission beam data is divided into 64 paths through a first power divider and transmitted to an emission signal output module; in the transmission signal output module, the ith transmission signal output channel corresponds to the ith output of the first power divider, i=1, 2, …,64; the ith transmission signal output channel respectively weights the ith output of the first power divider in each transmission pretreatment channel, and then synthesizes the ith output into one channel through a first adder, and then carries out equalization, interpolation and up-conversion and then outputs the output outwards; since there are 64 transmission signal output channels in total, the transmission assembly outputs 64 signals in total;
the receiving assembly comprises a receiving front-end module and a receiving signal output module; the receiving front-end module comprises 64 paths of receiving front-end channels; after each channel of receiving front-end channel performs down-conversion, extraction and equalization on the received signals, dividing the obtained signals into 32 channels through a second power divider and transmitting the 32 channels to a receiving signal output module; the receiving signal output module comprises 32 paths of receiving signal output channels, and in the receiving signal output module, the j-th path of receiving signal output channel corresponds to the j-th path of output of the second power divider; j=1, 2, …,32; the j-th channel of the receiving signal output channel weights the j-th channel of the second power divider in each receiving front-end channel respectively, combines the j-th channel of the receiving front-end channel into one channel through a second adder, and then carries out time delay filtering and extraction to obtain receiving beam data and transmits the receiving beam data to a baseband processor; since there are 32 received signal output channels in total, the baseband processor receives 32 signals in total.
2. The multi-phase adaptive multi-beam forming system of claim 1, wherein: each emission preprocessing channel comprises a first interpolation module, a first delay filtering module and a first power divider of 1:64;
the first interpolation module is used for receiving one path of data from the baseband signal processor, the output end of the first interpolation module is connected with the first power divider through the first delay filtering module, and the first power divider is respectively connected with each path of transmitting signal output channel.
3. The multi-phase adaptive multi-beam forming system of claim 1, wherein: each of the transmit signal output channels includes an up-conversion module, a second interpolation module, a first equalizer, a first adder, and a first weighting module;
for the ith transmitting signal receiving channel, a first weighting module is used for respectively weighting the ith output of a first power divider in each transmitting preprocessing channel, and then synthesizing the weighted output data through a first adder, wherein the output end of the first adder is sequentially output to the outside through a first equalizer, a second interpolation module and an up-conversion module;
in the ith transmitting signal receiving channel, the first weighting module comprises a plurality of first weighting units, and the first weighting units are the same as the transmitting preprocessing channels in number and correspond to each other one by one; the first input of each first weighting unit is the ith output of the corresponding first power divider in the transmission preprocessing channel, and the second input is a preset transmission weighting coefficient; the outputs of the first weighting units are connected with a first adder.
4. The multi-phase adaptive multi-beam forming system of claim 1, wherein: each receiving front-end channel comprises a down-conversion module, a first extraction module, a second equalization module and a second power divider of 1 minute 32;
in each receiving front-end module, the received data are sequentially transmitted to a second power divider through a down-conversion module, a first extraction module and a second equalization module, and the output end of the second power divider is respectively connected with each receiving signal output module.
5. The multi-phase adaptive multi-beam forming system of claim 1, wherein: each received signal output channel comprises a second extraction module, a second delay filtering module, a second adder and a second weighting module;
in the j-th receiving signal output channel, the second weighting module is used for respectively weighting the j-th output of the second power divider in each receiving front-end channel, synthesizing the weighted output data through a second adder, and transmitting the output signal of the second adder to the baseband processor after sequentially passing through the second delay filtering module and the second extracting module;
in the j-th receiving signal output channel, the second weighting module comprises a plurality of second weighting units, the second weighting units are the same as the number of the receiving front-end channels and are in one-to-one correspondence, the first input of each second weighting unit is the j-th output of the corresponding second power divider in the receiving front-end channel, the second input is a preconfigured receiving weighting coefficient, and the output ends of the second weighting units are all connected with a second adder.
6. A multiphase adaptive multi-beam forming method based on the system of any one of claims 1-5, characterized in that: the method comprises a transmitting beam forming step S1 and a receiving beam forming step S2;
the transmit beamforming step S1 includes:
the baseband processor is used for generating 32 paths of transmission beam data and transmitting the 32 paths of transmission beam data to the transmission component;
each path of emission preprocessing channel in the emission component receives the emission beam data of the baseband processor, carries out interpolation and time delay filtering, and then is divided into 64 paths through the first power divider to be transmitted to the emission signal output module;
in the transmission signal output module, the ith transmission signal output channel corresponds to the ith output of the first power divider, i=1, 2, …,64; the ith transmission signal output channel respectively weights the ith output of the first power divider in each transmission pretreatment channel, and then synthesizes the ith output into one channel through a first adder, and then carries out equalization, interpolation and up-conversion and then outputs the output outwards; since there are 64 transmission signal output channels in total, the transmission assembly outputs 64 signals in total;
the receiving beam forming step S2 includes:
after each channel of receiving front-end channel performs down-conversion, extraction and equalization on the received signals, dividing the obtained signals into 32 channels through a second power divider and transmitting the 32 channels to a receiving signal output module;
in the receiving signal output module, the jth path of receiving signal output channel corresponds to the jth path of output of the second power divider; j=1, 2, …,32; the j-th channel of the receiving signal output channel weights the j-th channel of the second power divider in each receiving front-end channel respectively, combines the j-th channel of the receiving front-end channel into one channel through a second adder, and then carries out time delay filtering and extraction to obtain receiving beam data and transmits the receiving beam data to a baseband processor; since there are 32 received signal output channels in total, the baseband processor receives 32 signals in total.
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