CN112311426A

CN112311426A - Two-dimensional simulation multi-beam receiving array system

Info

Publication number: CN112311426A
Application number: CN201910698836.6A
Authority: CN
Inventors: 穆丰浩; 徐立
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2021-02-02
Anticipated expiration: 2039-07-31
Also published as: CN112311426B

Abstract

The invention discloses a two-dimensional analog multi-beam receiving array system, which directly adopts analog two-dimensional multi-beam formation in a receiving array unit, generates multi-beams which are used for simultaneously receiving a plurality of required information sources from different directions, realizes receiving optimization through a digital signal processing method and inhibits a plurality of interference sources from different directions. The multi-beam controller dynamically divides a plurality of main beams and a plurality of auxiliary beams, is used for helping to search and track position change information of a required information source and an interference source, and updates the position direction of the main beams in real time.

Description

Two-dimensional simulation multi-beam receiving array system

Technical Field

The invention relates to application of a two-dimensional simulation multi-beam receiving array system, such as a wireless communication technology, a mobile communication technology, a satellite communication technology and the like which utilize radio frequency, and can also be used in application occasions of a receiving system of a phased array radar and related to radar detection.

Here, the radio frequency means a radio frequency including ultra high frequency/microwave/millimeter wave/terahertz.

Background

The traditional analog radio frequency phased array can only form a single wave beam, so that the receiver has low speed, low signal-to-noise ratio and short detection distance in search scanning. The analog radio frequency phased array single-beam technology is used for two-dimensional imaging, and has the defects of low sensitivity, single target, poor anti-jamming capability and the like.

The digital multi-beam radio frequency phased array receiver overcomes the limitation of an analog radio frequency phased array, can simultaneously generate two-dimensional beam signals, and is a theoretically ideal phased array receiving system. However, in practice, it can only be realized in a low-frequency narrow-band system, because in the case of a wide band, a high-speed analog-to-digital converter (ADC) satisfying the nyquist sampling theorem is required, and it is difficult to make the system small in size and low in power consumption. At higher application frequencies, such as microwave and millimeter waves, and even terahertz frequencies, it is difficult to integrate all of the rf devices, analog-to-digital converters, and digital interface circuits in a small area and space due to the antenna spacing being roughly on the order of half a wavelength. In addition, since no spatial filtering is performed before the ADC, a larger dynamic range and a larger number of quantization levels are required in order not to be affected by an interference signal, thereby greatly increasing the requirements for ADC design. A larger dynamic range of the ADC and a larger number of quantization levels means a larger power consumption. The large power consumption brings larger current pulses, causing higher interference pulse voltages, making the design of the ADC more difficult.

The large power consumption of the digital multi-beam radio frequency phased array receiver causes heat dissipation problems, and the device may be damaged when the device is overheated. The larger dynamic range and the larger number of quantization levels require more independent power supply networks, which means more package pins and larger chip package, and also pose a huge challenge to the design and integration of the system.

The most troublesome problem of digital multibeam rf phased array receivers is the wiring of the large number of digital transmissions and the resulting electromagnetic interference. There must be two ADCs per receive channel, and an array of M rows and N columns requires 2MN ADCs and high speed interfaces. When the number of elements in the array is large, it is difficult to connect these high-speed signal lines directly to the central processing unit, especially at millimeter wave or higher frequencies. This is because in the implementation method of the phased array, the distance between the antennas is half a wavelength, and all components and high-speed digital lines need to be placed in the narrow area, which causes a great challenge. The resulting electromagnetic interference noise, coupled into the antennas of the array, directly reduces the sensitivity of the array.

The method of the digital multi-beam radio frequency phased array receiver is to form a plurality of beams pointing to users, so that the transmitting/receiving signals of the antenna array in a specific direction are coherently superposed, and the signals in other directions are mutually counteracted.

Another approach to digital multi-beam formation is that of Massive MIMO. Massive MIMO can be considered as a form of beamforming in a broader sense. Massive refers to the number of a large number of antenna elements in an antenna array; MIMO refers to a multiple input multiple output system. Similar to the method of the digital multi-beam radio frequency phased array receiver, each antenna in the Massive MIMO antenna array is connected with a receiving channel, the receiving channel provides a digital interface, namely, radio frequency signals received on the antennas are converted into baseband signals in a down-conversion mode, then low-pass filtering is carried out, the baseband signals are directly digitized through an ADC (analog-to-digital converter), and all phase-shifting amplitude modulation is processed after being digitized. Massive MIMO in a practical system, the antennas and the ues, and the data transmitted in reverse direction are filtered by the surrounding environment. The signal may be reflected by buildings and other obstacles with associated delays, attenuations and directions of arrival. There may not even be a direct path between the antenna and the user terminal. These are solved directly by digitization, making the latter extremely computationally intensive.

Massive MIMO also has the disadvantages of digital multi-beam rf phased array receivers if it employs a phased array type compact integration. If the Massive MIMO adopts a non-phased array type distributed distribution mode, a larger area or space is needed, the power consumption of a digital signal processing part needed later is suddenly increased along with the increase of the number of array units, the system is more greatly realized, and the cost is greatly increased.

Disclosure of Invention

In order to solve the above technical problem, the present invention provides a two-dimensional analog multi-beam receiving array system 200, which includes a receiving array 201 of n rows and m columns of analog multi-beam receiving units 202 with antennas, a K columns of orthogonal differential tree transmission networks 203, an analog-digital signal mixing processing unit 204, a digital signal processing unit 205, and a digital control signal interface 206; the analog-digital signal mixing processing unit 204 comprises K columns of positive differential low-pass filters and analog-digital converters connected with the positive differential low-pass filters; the digital signal processing unit 205 includes a multi-beam controller 404, a multi-beam analyzing unit 411, a multi-beam tracking and interferer cancelling unit 412, and a control unit 416; the connection and working modes are as follows: the receiving array 201 converts the radio frequency signals received by the parallel antennas into multi-output multi-beam orthogonal baseband signals in columns and forms parallel two-dimensional analog multi-beam baseband IQ signals 409 through the tree transmission network 203, and the signals are fed to the analog digital signal mixing processing unit 204; the analog-digital signal mixing processing unit 204 converts the K-column output multi-beam orthogonal baseband signals into a two-dimensional digital multi-beam orthogonal baseband signal form through low-pass filtering and analog-to-digital conversion; the digital signal processing unit 205 generates a main beam simultaneously aiming at a plurality of desired sources 101/102 for receiving useful signals and a main beam simultaneously aiming at a plurality of interference sources 103/104 for suppressing these interference sources according to the two-dimensional digital multi-beam signal 410, generates a digital control signal and controls the receiving array through the digital control signal interface 206 to track the beam directions of the desired sources and the interference sources in real time. The "desired signal" and the "desired source" herein refer to the desired signal to be received and the desired source, respectively.

The two-dimensional analog multi-beam receiving array system 200 divides the dynamically generated two-dimensional digital multi-beam signal 410 into a main beam and an auxiliary beam under the control of the control unit 416 of the digital signal processing unit 205, wherein the main beam points to a plurality of required information sources and a plurality of interference sources respectively; the auxiliary beam is divided into an auxiliary search beam and an auxiliary tracking beam; the secondary search beam is used to search for a new transmission source and the secondary tracking beam is used to assist the primary beam in tracking the transmission source.

The two-dimensional analog multibeam receiving array system 200 can dynamically configure the number and pointing positions of the auxiliary search beams and the auxiliary tracking beams, as needed, under the control of the digital signal processing unit 205.

The two-dimensional analog multibeam receiving array system 200, under the control of the digital signal processing unit 205, decomposes the process of forming the main beam into L temporally separable sub-processes, and generates a two-dimensional K-row beam in each sub-process, which is time-division multiplexed on the time axis.

In the two-dimensional analog multi-beam receiving array system 200, the multi-beam analyzing unit 411 in the digital signal processing unit 205 performs signal analysis and classification on the main beam, and divides the main beam into the source main beam 120 and the interference main beam 121.

In the two-dimensional analog multi-beam receiving array system 200, the multi-beam analyzing unit 411 in the digital signal processing unit 205 performs signal analysis on the source main beam 120 to divide the homologous source main beam 122 and the heterologous source main beam 123.

In the two-dimensional analog multi-beam receiving array system 200, the digital signal processing unit 205 combines the signal homologous source main beams with the signal homologous source main beam by using an optimization algorithm in the multi-beam tracking and interference source eliminating unit 412 for all the independent source main beams 124, and suppresses the signal homologous source main beam 123 and the interference main beam 121 from the heterologous source main beam.

In the two-dimensional analog multibeam receiving array system 200, the control unit 416 in the digital signal processing unit 205 generates a control timing and various control signals according to an external clock signal, thereby completing the control of the working clock.

The analog multi-beam receiving unit 202 of the two-dimensional analog multi-beam receiving array system 200 can be implemented by a plurality of baseband multi-beam phase-shift modulator 311m unit circuits in an analog baseband signal domain.

In the two-dimensional analog multibeam receiving array system 200, the analog multibeam receiving unit 202 may implement multibeam by performing down-conversion on the radio frequency signal amplified by the radio frequency signal received by the antenna in the down-converters by using the multi-phase orthogonal local oscillation phase shift signal 313 m.

The analog multibeam receiving unit 202 of the two-dimensional analog multibeam receiving array system 200 can be realized by amplifying the rf signal received by the antenna using the multibeam phase-shift am 311 and then directly phase-shifting and modulating the rf signal.

The analog multi-beam receiving unit 202 of the two-dimensional analog multi-beam receiving array system 200, the required multi-beam phase-shift am control signal 321, and the multi-beam controller 404 from the digital signal processing unit 205 are connected by the digital control signal interface 206.

The two-dimensional analog multibeam receiving array system 200, the analog multibeam receiving unit 202, and the multibeam controller 404 in the digital signal processing unit 205 may be integrated and implemented in a distributed physical manner.

In the two-dimensional analog multi-beam receiving array system 200, the multi-beam controller 404 in the digital signal processing unit 205 updates the number, pointing direction and various receiving parameters of the plurality of required signal sources 101/102 and the plurality of interference sources 103/104 in real time according to the working beat through the digital control signal interface 206.

In the two-dimensional analog multi-beam receiving array system 200, the digital signal processing unit 205 can dynamically adjust the division threshold 611 according to the receiving status, so as to control the number of main beams, increase or decrease the complexity of the optimization algorithm, and dynamically balance between the quality of the received signal and the required minimum power consumption.

The invention is different from the traditional analog phased array receiver in that the former can generate a plurality of beams simultaneously, can receive information of a plurality of information sources simultaneously and inhibit coupling caused by interference sources, which cannot be realized by the latter.

The digital multi-beam radio frequency phased array receiver is different from a digital multi-beam radio frequency phased array receiver in that the digital multi-beam radio frequency phased array receiver can form multi-beams through an analog method, the number of necessary low-pass filters and analog-to-digital converters is greatly reduced, the problem of electromagnetic compatibility cannot be caused by connection, and cost and power consumption are greatly reduced; in the latter, 2 × mxn low-pass filters and analog-to-digital converters are used in an mxn array, and the digital connection is also very difficult, and the cost and power consumption are very high.

The invention is different from a Massive MIMO receiver in that the Massive MIMO receiver can form two-dimensional multi-beams by a simulation method, then generates a plurality of main beams by dividing a threshold value, and combines the same information source and eliminates an interference source by the main beams with greatly reduced quantity, thereby greatly reducing hardware requirements, calculation cost and power consumption; the hardware overhead of the latter is similar to that of a digital multi-beam radio frequency phased array receiver, and the calculation cost required for solving the matrix equation is much larger.

Drawings

FIG. 1 is a schematic diagram of a desired source and an interferer requiring reception in real-time spatial domain

Figure 2 two-dimensional analog multibeam receive array system

Fig. 3 simulates several implementations of multi-beam receiving unit 202

FIG. 4 shows a two-dimensional separable receive array and digital signal processing unit architecture 400

Figure 5 real-time multi-beam search and tracking schematic

Fig. 6 is a schematic diagram of other beam interference on beam B1

FIG. 7 tracking the position of a main beam with an auxiliary beam

FIG. 8 is a schematic flow chart of the process of receiving the coupling of the desired source and the interference source

Detailed Description

The invention aims at the technical problem, and provides a two-dimensional analog multi-beam receiving array system 200, which solves the problem of interference of an interference source in multipath communication or radar detection as shown in fig. 1.

Assuming a first dimension in a two-dimensional space of theta_xThe second dimension direction is theta_yWe need to receive multiple desired sources such as 101/102/101b simultaneously with multiple interfering sources 103/104. Where it is required that the sources 101 and 101b belong to one information source but come from two or more different directions. The desired source 102 is not the same information source as the desired sources 101 and 101b, but is independent sources. We call sources 101 and 101b homologous sources, while mutually independent sources are heterologous sources. The method aims to solve the problem that all required information sources are received respectively at the same time, combination is carried out among homologous information sources, and meanwhile influences from interference sources are restrained to the maximum extent. These effects can cause a decrease in the signal-to-noise ratio, SNR, in a communication system, EDegradation of the VM reduces the quality and bandwidth of the communication.

First, we generate a two-dimensional beam using a method of simulating multiple beams. As shown in fig. 2, the two-dimensional analog multibeam receiving array system 200 includes n rows and m columns of receiving arrays 201 of analog multibeam receiving units 202 having antennas, a tree transmission network 203, an analog-digital signal mixing processing unit 204, a digital signal processing unit 205, and a digital control signal interface 206.

The receiving array 201 is used for receiving the radio frequency electromagnetic wave incident in parallel through the antenna array to be converted into a radio frequency electric signal, then generating K independent two-dimensional analog multi-beams through the n rows and m columns of analog multi-beam receiving units 202, and outputting the K independent two-dimensional analog multi-beams in the form of orthogonal component I/Q and differential baseband signals.

Radio frequency formation of two-dimensional analog multi-beam, to be realized

sin(wt+b)＝sin(wt)cos(b)+cos(wt)sin(b)

Is weighted. Where w is the angular frequency of the radio frequency carrier frequency and b is the angle of the phase shift.

When we want to perform two-dimensional analog beamforming on the analog multibeam receiving unit 202 of the linear receiving array 201, b can be written as:

b＝nΔθx_i+mΔθy_i+b0(n,m)

where n and m are the addresses of the receiving units 202 in the array, Δ θ x_iIs the phase shift angle of the ith beam in the x-direction, m Δ θ y_iIs the phase shift angle of the i-th beam in the y-direction, b0(n, m) is the intrinsic phase shift angle of the cell, and i is 1,2,3, …, K.

One of the ways to simulate the implementation of multi-beam forming is by vector modulation at radio frequencies. Simulating the multi-beam receiving unit 202, amplifying the radio frequency signals received by the antenna, forming orthogonal radio frequency vectors, i.e. orthogonal radio frequency signals with a phase difference of 90 degrees, weighting the required phases by taking a sine function and a cosine function respectively, and finally realizing

sin(wt+b)＝sin(wt)cos(b)+cos(wt)sin(b)

The physical implementation is done by a plurality of parallel multi-beam phase-shift modulators 311 and parallel down-converters 312m, see fig. 3 (b).

Another method for analog multi-beam forming implementation is shown in fig. 3(c), which is implemented by parallel down-conversion 312m, and requires independently controllable multiphase quadrature local oscillator phase shift signals 313m to clock the parallel down-conversion 312 m. This requires the generation of multiple phase quadrature local oscillator phase shifted signals 313m, which may also be generated by linear vector synthesis using the quadrature phase of the original local oscillator LO, to achieve, for example, sin (w)_Lot+b)＝sin(w_Lot)cos(b)+cos(w_Lot) phase shifting of sin (b), where w_LoIs the local oscillator frequency.

Another approach to analog multi-beamforming implementation is shown in fig. 3(d), and can be implemented by parallel phase-shifting the amplitude modulator for the orthogonal baseband signal. The rf input signal 302 is amplified by the lna 310 and then converted to an orthogonal baseband signal by the parallel down-converter 312; the parallel phase-shifting amplitude modulator 311m performs vector modulation on the orthogonal baseband signal to shift the phase, thereby realizing

sin(Ωt+b)＝sin(Ωt)cos(b)+cos(Ωt)sin(b)

Where Ω is the baseband angular frequency. Then, amplitude modulation is performed by an amplitude modulator, and a multi-beam phase-shifting and amplitude-modulating baseband signal 320 is output.

Regardless of which method is employed, analog multi-beam receiving element 202 may be represented by the symbol of fig. 3 (a); the analog multi-beam receiver 202 requires a multi-beam phase-shift am control signal 321 from the multi-beam controller 404 of the digital signal processor 205 to the analog multi-beam receiver 202 via the digital control signal interface 206.

A two-dimensional separable receive array and digital signal processing unit architecture 400 is shown in fig. 4, and includes a receive array 201, parallel analog multi-beam baseband IQ signal lines 401 connected at the array level to outputs of M columns of N rows of analog multi-beam receive units 202, a tree transmission network 203, an analog-to-digital signal mixing processing unit 204, and a digital signal processing unit 205. The parallel analog multibeam baseband IQ signal lines 401 connect the outputs of the receiving units 202 partially according to the beam order of the multibeam output by each analog multibeam receiving unit 202, and the tree transmission network 203 connects the outputs of the receiving units partially or globally on the basis of the partial connection until all the beam outputs are connected together according to the beam order to form a parallel two-dimensional analog multibeam baseband IQ signal 409, which has an IQ if set as

IQ＝[(i₁,q₁),(i₂,q₂),(i₃,q₃),…,(i_K,q_K)]

Wherein (i)_i,q_1i) Is the generation of the ith beam.

The tree transmission network 203 may be implemented as a one-dimensional 2-ary tree structure, for example, a partial connection in the vertical direction is made at the output of one dimension, and then a full connection of the one-dimensional 2-ary tree structure is made in the horizontal direction. The tree transmission network 203 may also be implemented as a two-dimensional 2-ary tree structure, i.e. the beam outputs of the receiving units 202 of the array are connected in sub-blocks.

The tree transmission network 203 also presents the characteristic of low-pass filtering, and is cascaded with a low-pass filter in the analog-digital signal mixing processing unit 204 at the back to synthesize the whole required characteristic of low-pass filtering, and performs low-pass filtering on baseband signals to remove out-of-band interference signals, so as to ensure that the ADC can normally work under the condition of satisfying the Nyquist sampling condition without aliasing distortion. The analog-digital signal mixing processing unit 204 includes 2K Low Pass Filters (LPFs) cascaded to 2K analog-to-digital converters (ADCs) because one beam is represented by two components in a quadrature output form. The output signal of the analog-digital signal mixing processing unit 204 is a two-dimensional digital multi-beam signal 410.

The digital signal processing unit 205 includes a multi-beam controller 404, a multi-beam analyzing unit 411, a multi-beam tracking and interferer cancelling unit 412, and a control unit 416.

The multi-beam analyzing unit 411 divides the two-dimensional digital multi-beam signal 410 according to a specific division threshold 611 according to the two-dimensional digital multi-beam 410, and if the signal amplitude is larger than the division threshold 611, keeps its output as a main beam; if the main beam is not defined before, redefining a main beam, detecting the characteristics of the information source through digital demodulation, and marking the main beam; the source is characterized by source information indicating the source of the source, which may be different in different applications and standards, such as the need to solve the channel state information code in 5G communication, for example, to obtain the satellite identity/identification code in satellite communication, such as the MAC address code in IP-based digital communication.

The multi-beam analysis unit 411 quantizes the detected plurality of desired sources 101/102 and plurality of interferers 103/104 on a two-dimensional beam grid, and sets the source and interferer that are greater than the splitting threshold 611 on the two-dimensional digital multi-beam signal 410 as the primary beam.

The multi-beam analyzing unit 411 performs signal analysis and classification on the main beam, and divides the main beam into the source main beam 120 and the interference main beam 121. The multi-beam analysis unit 411 performs signal analysis on the source main beam 120 to divide the homologous source main beam 122 and the heterologous source main beam 123.

The multi-beam tracking and interferer cancellation unit 412 may be implemented using a digital signal processor DSP, or may be implemented using a programmable array FPGA, or a CPU/GPU. One of the tasks of the multi-beam tracking and interferer cancellation unit 412 is to track, i.e. check, whether the already defined position of the main beam is the optimal position, i.e. the position of the grid intersection reaching the maximum amplitude, in the tracking zone around the main beam, see fig. 5. If the current position is not the position of the maximum amplitude, updating to the position of the intersection point of the maximum amplitude; if the current position is already the position of maximum magnitude, the current position is maintained.

Another task of the multi-beam tracking and interferer cancellation unit 412 is interferer cancellation, i.e., the source main beam 120 is optimized to minimize the interference to it by all interfering main beams 121 and the heterologous source main beam 123. For a desired source, although the associated receive main beam is directed toward it, there will still be interference from other sources, including interference main beam 121 and heterologous source main beam 123. Of course, there may be a main beam 122 from a source of origin in a different direction. The primary beam 122 of the same source may be generated by blocking or reflecting an rf signal transmitted from a transmitting source, or may be transmitted directly from a different direction.

If the output of main beam B1 contains interference from other sources, see fig. 6, B3 and B4 are two interference main beams 121, B2 is a heterologous source main beam 123, and B1B is a homologous source main beam 122. For the main beam B1, its output may be expressed as

Y1＝a11B1+a12B2+a13B3+a14*B4...,

More generally stated as

Y＝AB+n

Where a is a coupling matrix whose diagonal elements are self-coupling coefficients, which tend to be much larger than the off-diagonal elements. B is the main beam vector, n is other interference and noise contributions, and Y is the actual output. Interference from other directions, including interference from other sources, can be reduced by an optimization algorithm.

The optimization algorithm may be a variety of algorithms, such as Least Mean Square Error (LMSE) and zero forcing (force zero), and in the case of a known coupling matrix A, taking

B＝(A^HA)^-1AHY

In the case of an unknown coupling matrix a, an iterative approach to a may also be employed.

The multi-beam tracking and interferer cancellation unit 412 combines the signal and the interferer source main beam using an optimization algorithm and suppresses the signals from the alien source main beam 123 and the interferer source main beam 121.

The control unit 416 in the digital signal processing unit 205 forms an operation clock by a frequency synthesizer or other clock based on an external clock signal, generates control timing, and various control signals as needed to perform beat control.

The multi-beam controller 404 in the digital signal processing unit 205 updates the number and pointing direction of the plurality of desired signal sources 101/102 and the plurality of interference sources 103/104, and various receiving parameters in real time according to the working beat through the digital control signal interface 206. As previously described, multi-beam controller 404 may be in a centralized mode as shown in fig. 4, or may be designed to be partially centralized and partially distributed, i.e., one part remains in fig. 4, and another part is distributed into sub-modules in an array; or may be entirely distributed, such as integrated in analog multi-beam receiving unit 202. The digital control signal interface 206 is partially adjusted or divided into blocks according to the implementation of the multi-beam controller 404, and is also partially distributed.

The control unit 416 of the dsp 205 also has a special control function, which can dynamically adjust the segmentation threshold 611 according to the receiving status. When the division threshold 611 is selected to be low, the number of main beams appearing is large, and the amount of calculation in the following is also large. When the division threshold 611 is selected to be high, the number of main beams appearing is small, and the amount of calculation in the following is also small. The control unit 416 is responsible for controlling the number of main beams, increasing or decreasing the complexity of the optimization algorithm, and dynamically balancing the received signal quality with the required minimum power consumption.

When K is greater than the number of primary beams, a portion of the beams may be extracted to serve as secondary beams. There are two types of auxiliary beams: an auxiliary search beam and an auxiliary tracking beam. The auxiliary search beam is used for randomly searching in a two-dimensional space, and searching a new emission source; the auxiliary tracking beam is used for detecting whether a main beam position direction is more optimal in the field defined as the main beam so as to update in real time or in the next working beat. A schematic diagram of the tracking of the position of the main beam by the auxiliary beam is shown in fig. 7, and possible implementations are (a), (b), (c), (d), etc. That is, the position of the main beam may be tracked by one auxiliary tracking beam, such as (a), or the position of the main beam may be tracked by a plurality of auxiliary tracking beams, such as (b), (c), (d), etc., or may be time-shared.

A schematic flow chart of a method for receiving a desired source and canceling interference source coupling by using a two-dimensional analog multi-beam receiving array is shown in fig. 8.

The technology proposed in the invention can be applied to occasions such as wireless communication, mobile communication, satellite communication and the like. Because the radar technology and the communication technology are many common points, the technology can also find an application scene in the radar field for realizing multi-target tracking and real-time interference elimination.

The above description is only a preferred embodiment and a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, change, and subdivision and change of equivalent structure, and renaming of equivalent technical terms and names according to the technical spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A two-dimensional analog multi-beam receiving array system is characterized by comprising a receiving array of n rows and m columns of analog multi-beam receiving units with antennas, a K-column orthogonal differential tree-shaped transmission network, an analog-digital signal mixing processing unit, a digital signal processing unit and a digital control signal interface; the analog-digital signal mixing processing unit comprises a K-column positive differential low-pass filter and an analog-digital converter; the digital signal processing unit comprises a multi-beam controller, a multi-beam analysis unit, a multi-beam tracking and interference source eliminating unit and a control unit; the connection and working modes are as follows: the receiving array converts the radio frequency signals received by the parallel antenna into multi-path output multi-beam orthogonal baseband signals in a row, forms parallel two-dimensional analog multi-beam baseband IQ signals through a tree-shaped transmission network, and feeds the signals to the analog digital signal mixing processing unit; the analog-digital signal mixing processing unit converts K-column output multi-beam orthogonal baseband signals into a form of two-dimensional digital multi-beam orthogonal baseband signals through low-pass filtering and analog-digital conversion; the digital signal processing unit generates a main beam simultaneously aiming at a plurality of required information sources for receiving useful signals according to two-dimensional digital multi-beam signals, generates a main beam simultaneously aiming at a plurality of interference sources for inhibiting the interference sources, generates a digital control signal, controls a receiving array through a digital control signal interface, and tracks the beam directions of the required information sources and the interference sources in real time.

2. The two-dimensional analog multi-beam receive array system of claim 1, wherein the dynamically generated two-dimensional digital multi-beam is divided into a main beam and an auxiliary beam under the control of the control unit in the digital signal processing unit, wherein the main beam is directed to the plurality of desired sources and the plurality of interferers, respectively; the auxiliary beam is divided into an auxiliary search beam and an auxiliary tracking beam; the secondary search beam is used to search for a new transmission source and the secondary tracking beam is used to assist the primary beam in tracking the transmission source.

3. A two dimensional analog multibeam receive array system according to claim 1, wherein the number and pointing positions of said forming of said auxiliary search beams and said auxiliary tracking beams can be dynamically configured as desired under the control of said digital signal processing unit.

4. A two-dimensional analog multibeam receive array system according to claim 1, wherein said process of forming the main beam is decomposed into L temporally separable sub-processes under the control of the digital signal processing unit, each of which produces a two-dimensional K-column of beams that are time-division multiplexed on the time axis.

5. A two-dimensional analog multi-beam receive array system according to claim 1, wherein the multi-beam analysis unit in the digital signal processing unit performs signal analysis and classification on the main beam into a source main beam and an interference main beam.

6. The system according to claim 1, wherein the multi-beam analysis unit in the digital signal processing unit performs signal analysis on the source main beam to separate a source main beam from a source main beam.

7. The system of claim 1, wherein the digital signal processing unit combines the same source main beams of signals and suppresses the main beams from the different sources and the interference main beams using an optimization algorithm in the multibeam tracking and interferer cancellation unit for all independent source main beams.

8. The two-dimensional analog multi-beam receive array system of claim 1, wherein: the control unit in the digital signal processing unit generates a control time sequence and various required control signals according to an external clock signal to complete work beat control.

9. A two-dimensional analog multi-beam receive array system according to claim 1, wherein the analog multi-beam receive elements are implemented in the analog baseband signal domain by a plurality of baseband multi-beam phase-shift modulator element circuits.

10. A two dimensional analog multi-beam receive array system according to claim 1 wherein the analog multi-beam receive unit can be multi-beam by down converting the radio frequency signals received and amplified by the antenna in a plurality of down converters using multi-phase quadrature local oscillator phase shifted signals.

11. A two dimensional analog multibeam receive array system according to claim 1, wherein the analog multibeam receive unit is operable by direct phase-amplitude modulation of the radio frequency signals received and amplified by the antenna using a multibeam phase-shift amplitude modulator.

12. The two dimensional analog multibeam receive array system of claim 1, wherein analog multibeam receive units, the desired multibeam phase-shifted amplitude modulation control signals, are coupled by a digital control signal interface from a multibeam controller in the digital signal processing unit.

13. A two-dimensional analog multibeam receive array system according to claim 1, wherein the multibeam controllers in the analog multibeam receive unit and the digital signal processing unit are integrated and implemented in a distributed physical manner.

14. The system according to claim 1, wherein the multibeam controller in the digital signal processing unit updates the number and pointing direction of the plurality of desired signal sources and the plurality of interference sources, and the various reception parameters in real time according to the operation cycle through the digital control signal interface.

15. A two dimensional analog multibeam receive array system according to claim 1, wherein the digital signal processing unit is capable of dynamically adjusting the splitting threshold according to the receive state to control the number of main beams, increase or decrease the complexity of the optimization algorithm, and dynamically balance the received signal quality with the required minimum power consumption.