Anti-interference array antenna host with variable array elements

Abstract

The invention relates to an anti-interference array antenna host with variable array elements, which is composed of antenna characteristic modeling software and an array signal processing host, and is characterized in that the antenna characteristic modeling software is mainly used for modeling an antenna array and can set parameters including the number of array elements, array element spacing, array element positions, an antenna pattern and the like; the wave path difference of navigation and interference signals in different directions reaching different array elements of the array antenna and wavefront simulation parameters such as signal power, time delay and Doppler change values are calculated by taking the reference array element as the center, and the characteristics of different types of array antennas are flexibly simulated; the array signal processing host is mainly used for executing an anti-interference processing algorithm configured by a user, supporting a space-time / space-frequency filtering framework, an LMS / SMI / DMI / RLS inversion method, an LCMV / MMSE / MSINR constraint criterion, zeroing / wave beam and other combined strategies, and flexibly simulating the characteristics of different anti-interference processing modules.

Description

Technical Field

[0001] The invention belongs to the technical field of satellite navigation anti-interference, in particular to an anti-interference array antenna host with variable array elements. Background Art

[0002] Anti-interference array antennas are mainly used to receive actual radio frequency signals and perform anti-interference processing, including satellite navigation signals and interference signals and noise signals. Ordinary anti-interference array antennas are based on the principle of interference. Multiple antennas are configured together, and the phase difference (wavelength difference) of the same signal reaching each antenna array element is used to form a null, which has a suppressive effect on the interference signal. However, in actual use, the array element characteristics and anti-interference strategies of anti-interference array antennas are almost fixed. Four-element and seven-element antennas are commonly used. The relative coordinates of the array elements determine the antenna array design and the anti-interference module hardware design. When it is necessary to verify the performance of different array modes and anti-interference processing algorithms, it can only be verified on the basis of simulation calculations and combined with engineering prototypes. At present, there is an urgent need for an anti-interference array antenna host with variable array elements. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and propose an anti-interference array antenna host with variable array elements, which consists of two parts: antenna characteristic modeling software and an array signal processing host. The antenna characteristic modeling software mainly models the antenna array, and can set parameters including the number of array elements, array element spacing, array element position, antenna radiation pattern, etc., and calculates the path difference of different incoming navigation and interference signals arriving at different array elements of the array antenna with a reference array element as the center, as well as wavefront simulation parameters such as signal power, time delay, and Doppler change value, so as to flexibly simulate different types of array antenna characteristics; the array signal processing host mainly executes the anti-interference processing algorithm configured by the user, supports space-time / space-frequency filtering architecture, LMS / SMI / DMI / RLS inversion method, LCMV / MMSE / MSINR constraint criteria, and combination strategies such as zeroing / beam adjustment, and flexibly simulates the characteristics of different anti-interference processing modules.

[0004] The present invention solves the technical problem by adopting the following technical solutions:

[0005] A host of anti-interference array antenna with variable array elements comprises a casing and internal hardware equipped with antenna characteristic modeling software, wherein the internal hardware is installed inside the casing, the internal hardware comprises an interference processing unit, a radio frequency signal processing unit and a frame, the interference processing unit is connected to the radio frequency signal processing unit, the interference processing unit and the radio frequency signal processing unit are installed inside the frame, and the frame is used to support the internal hardware.

[0006] Moreover, the interference processing unit includes a clock management module, an AD sampling module, a DA conversion module, an anti-interference processing module, an optical port driver and a power management module, wherein the clock management part is used to convert the frequency of the 10MHz clock and branch it to provide clock references to the AD sampling module, the DA conversion module and the anti-interference module respectively; the AD sampling module includes 8 AD sampling channels and four receiving channels; the DA conversion module includes 1 intermediate frequency output channel; the anti-interference processing module is used for the logic control of the entire system; the optical port driver includes a two-way optical fiber interface of 1 transmit and 1 receive for realizing high-speed data interaction between the system and the outside; the power management part is used to convert the 220V power supply voltage input by the industrial computer into the power supply voltage required by the anti-interference processing unit.

[0007] Moreover, the RF signal processing unit includes an intermediate frequency filtering component, a clock management module, a down-RF processing module, an up-conversion processing module, a power management module, and an external interface, wherein the clock management module is used to cache and branch the onboard 10MHz clock to provide clock references to the down-conversion processing module, the up-conversion processing module, and the anti-interference processing unit; the down-RF processing module includes 8 down-conversion input channels, and two four-channel broadband RF chips are selected as down-conversion channels, and the up-conversion processing module includes 1 up-conversion output channel; the RF front-end module is used to filter, amplify and control the power of the input RF signal; the intermediate frequency filter is used to filter the down-converted signal and filter out the high-frequency branch; the external interface includes two RS422 signals, two RS232 signals, and one network port, which are used to complete the data interaction between the system and the external; the power management module is used to convert the 220V voltage input by the industrial computer into various voltages required by the RF signal processing unit.

[0008] The antenna characteristic modeling software includes a coordinate calculation submodule for each array element, an array delay difference matrix calculation submodule, an intermediate frequency carrier phase difference calculation submodule, a satellite / interference position calculation module, a satellite DOA calculation module, a receiver position calculation module and a receiver attitude calculation module, wherein the satellite / interference position calculation module, the receiver position calculation module and the receiver attitude calculation module are respectively connected to the satellite DOA calculation module, the satellite DOA calculation module and the coordinate calculation submodule for each array element are connected to the array delay difference matrix calculation submodule, the array delay difference matrix calculation submodule is connected to the intermediate frequency carrier phase difference calculation submodule, the intermediate frequency carrier phase difference calculation submodule and the array delay difference matrix calculation submodule are connected to the intermediate frequency array signal synthesis module, wherein the coordinate calculation submodule for each array element is used to calculate the coordinates of each array element; the array delay difference matrix calculation submodule is used to calculate the array delay difference matrix; the intermediate frequency carrier phase difference calculation submodule is used to calculate the intermediate frequency carrier phase difference; the satellite / interference position calculation module is used to determine the actual position of the satellite according to the satellite ephemeris parameters; the satellite DOA calculation is used to calculate the incident DOA of the navigation / interference signal according to the actual position of the satellite and the actual position and attitude of the receiver.

[0009] Furthermore, the antenna characteristic modeling software supports circular array antenna layout, rectangular array antenna layout and conformal array antenna layout.

[0010] Moreover, in the circular array antenna arrangement mode, each array element is evenly distributed on a circle with a radius of R, θ, are the elevation angle and azimuth angle of the signal incident direction respectively. The center array element A1 is taken as the coordinate origin, and the line connecting the center array element A1 and the second array element A2 is taken as the X-axis to establish the antenna array coordinate system. The path difference of each element of the N-element central circular array is obtained as follows:

[0011]

[0012] Among them, n = 1, 2, ..., N, the circle radius R = d, the array element spacing is half a wavelength, d = λ0 / 2, λ0 is the carrier wavelength.

[0013] Moreover, in the rectangular array antenna arrangement, the array elements are evenly distributed at a spacing of d. x *d y At the grid points of are the elevation angle and azimuth angle of the signal incident direction, respectively. 11 The coordinate origin O, point O and the last element A in the first row 1N The connecting line is used as the X-axis to establish the antenna array coordinate system. The path difference of each element of the rectangular array with M rows and N columns is:

[0014]

[0015] Among them, d xis the distance between each row of array elements, d y is the spacing between each row of array elements.

[0016] Moreover, in the conformal array antenna arrangement mode, each array element of each layer is evenly distributed on a circle with a radius of R, θ, are the elevation angle and azimuth angle of the signal incident direction respectively. The coordinate origin is O, the center of the bottom circular array, and the coordinate origin O is the first element A of the bottom circular array. 11 The antenna array coordinate system is established by connecting the lines as the X-axis. The path difference of each element in the M-layer N-element cylindrical conformal array is:

[0017]

[0018] Among them, the number of layers m = 1, 2, ..., M, the number of array elements in each layer n = 1, 2, ..., N, the radius of each circular array R = d / [2cos(π / N)], and the array element spacing is generally half of the wavelength, that is, d = λ0 / 2, where λ0 is the carrier wavelength. z is the distance between layers.

[0019] The advantages and positive effects of the present invention are:

[0020] The present invention consists of two parts: antenna characteristic modeling software and an array signal processing host. The antenna characteristic modeling software mainly models the antenna array, and can set parameters including the number of array elements, array element spacing, array element position, antenna radiation pattern, etc., and calculates the path difference of different incoming navigation and interference signals arriving at different array elements of the array antenna with the reference array element as the center, as well as wavefront simulation parameters such as signal power, time delay, and Doppler change value, so as to flexibly simulate the characteristics of different types of array antennas; the array signal processing host mainly executes the anti-interference processing algorithm configured by the user, supports space-time / space-frequency filtering architecture, LMS / SMI / DMI / RLS inversion method, LCMV / MMSE / MSINR constraint criteria, and combination strategies such as zeroing / beaming, so as to flexibly simulate the characteristics of different anti-interference processing modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of an anti-interference array antenna host with variable array elements according to the present invention;

[0022] Figure 2 It is a rear view of an anti-interference array antenna host with variable array elements of the present invention;

[0023] Figure 3 It is a schematic diagram of the internal hardware of a host computer of an anti-interference array antenna with variable array elements of the present invention;

[0024] Figure 4 This is a hardware block diagram of a radio frequency signal processing unit of an anti-interference array antenna host with a variable array element according to the present invention;

[0025] Figure 5 A hardware block diagram of an anti-interference processing unit of an anti-interference array antenna host with a variable array element according to the present invention;

[0026] Figure 6 A dynamic loading information flow chart of an anti-interference array antenna host with variable array elements according to the present invention;

[0027] Figure 7 A block diagram of the host and software interaction of an anti-interference array antenna host with variable array elements of the present invention;

[0028] Figure 8 A beam pointing synthetic antenna pattern of an anti-interference array antenna host with a variable array element according to the present invention;

[0029] Fig. 9 A schematic diagram of the structure of antenna characteristic modeling software for an anti-interference array antenna host with a variable array element according to the present invention;

[0030] Fig.10 A schematic diagram of the path difference of a planar N-element central circle array of an anti-interference array antenna host with a variable array element according to the present invention;

[0031] Fig.11 A schematic diagram of the path difference of a planar rectangular array of M rows and N columns of an anti-interference array antenna host with a variable array element according to the present invention;

[0032] Fig.12 A schematic diagram of the path difference of an M-layer N-element cylindrical array of an anti-interference array antenna host with a variable array element according to the present invention;

[0033] Fig.13 A schematic diagram of modeling a host antenna model of an anti-interference array antenna with variable array elements according to the present invention;

[0034] Fig.14 A schematic diagram of the modeling effect of a host antenna model of an anti-interference array antenna with a variable array element according to the present invention;

[0035] Fig.15 The invention provides a host array antenna modeling and synthesized antenna pattern for an anti-interference array antenna with a variable array element. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below with reference to the accompanying drawings.

[0037] A host of anti-interference array antenna with variable array elements, such as Figure 1 and Figure 2The figure shows a standard 19-inch rack structure with a height of 4U. The weight of the whole machine is about 26Kg, and the dimensions are: length, width and height 527×482×177mm. The host includes a housing and internal hardware equipped with antenna characteristic modeling software, where the internal hardware is installed inside the housing, such as Figure 3 As shown, the internal hardware includes an interference processing unit, a radio frequency signal processing unit and a frame. The interference processing unit is connected to the radio frequency signal processing unit. The interference processing unit and the radio frequency signal processing unit are installed inside the frame. The frame is used to support the internal hardware.

[0038] The anti-interference processing unit is connected to the RF signal processing unit through the frame middleware. The main function of the anti-interference processing unit is to receive the 8-channel intermediate frequency signal output by the RF signal processing unit, complete the anti-interference processing, and output the signal after eliminating the interference. The design block diagram of the anti-interference processing unit is shown in the figure. Figure 5 As shown, the interference processing unit includes a clock management module, an AD sampling module, a DA conversion module, an anti-interference processing module, an optical port driver and a power management module, wherein the clock management part is used to convert the 10MHz clock and split it to provide clock references to the AD sampling module, the DA conversion module and the anti-interference module respectively; the AD sampling module includes 8 AD sampling channels and four receiving channels; the DA conversion module includes 1 intermediate frequency output channel; the anti-interference processing module is used for the logic control of the entire system; the optical port driver includes 1 transmit and 1 receive two-way optical fiber interface for realizing high-speed data interaction between the system and the outside; the power management part is used to convert the 220V power supply voltage input by the industrial computer into the power supply voltage required by the anti-interference processing unit.

[0039] The main function of the RF signal processing unit is to receive up to 8 RF signals output by the antenna array, adjust the RF amplitude, down-convert and filter the RF, and then send it to the anti-interference processing unit, and output the RF signal after anti-interference by the anti-interference processing unit. The design block diagram of the RF signal processing unit is shown in the figure. Figure 4As shown, the RF signal processing unit includes an intermediate frequency filtering component, a clock management module, a down-conversion RF processing module, an up-conversion processing module, a power management module, and an external interface, wherein the clock management module is used to cache and branch the onboard 10MHz clock to provide clock references to the down-conversion processing module, the up-conversion processing module, and the anti-interference processing unit; the down-conversion RF processing module includes 8 down-conversion input channels, and two four-channel broadband RF chips are selected as down-conversion channels, and the up-conversion processing module includes 1 up-conversion output channel; the RF front-end module is used to filter, amplify and control the power of the input RF signal; the intermediate frequency filter is used to filter the down-converted signal and filter out the high-frequency branch; the external interface includes two RS422 signals, two RS232 signals, and one network port, which are used to complete the data interaction between the system and the external; the power management module is used to convert the 220V voltage input by the industrial computer into various voltages required by the RF signal processing unit.

[0040] The array signal processing host design supports the selection of four typical GNSS operating frequencies for anti-interference processing, or the user-defined center frequency, and supports the configuration of different anti-interference methods.

[0041] 1) Space-time filtering

[0042] The first method is based on matrix inversion, which includes three criteria: LCMV, MMSE, and MSINR. The weight formulas derived based on these three criteria all require sampling matrix inversion (SMI). The LCMV criterion allows for zeroing and beamforming; the MSINR criterion itself requires the maximum signal-to-interference-noise ratio, so the signal direction must be constrained, and beamforming is naturally required; the MMSE criterion can only perform zeroing.

[0043] The second method is the LMS algorithm, which calculates weights through iteration. Compared with the sampling matrix inversion (SMI) method, it has lower complexity, but only supports zeroing and does not support beamforming.

[0044] The third method is the RLS algorithm, which also updates weights in an iterative manner. The amount of calculation is greater than that of the LMS algorithm. It only supports zeroing but not beamforming.

[0045] 2) Space-frequency filtering

[0046] The performance of space-frequency filtering and space-time filtering is theoretically consistent. Generally, the matrix inversion method is used, which also includes the minimum mean square error (MMSE) criterion, the linear constrained minimum variance (LCMV) criterion, and the maximum signal-to-interference-to-noise ratio (MSINR) criterion. Among them, the LCMV and MSINR criteria can be used for zeroing and beamforming. The LMS algorithm and the RLS algorithm are rarely used in space-frequency filtering.

[0047] Table 1 Anti-interference methods

[0048]

[0049]

[0050] As shown in Table 1, the present invention uses a solution based on FPGA dynamic loading to achieve flexible configuration of the anti-interference algorithm and cope with future expansion and upgrades. The anti-interference algorithm is still executed in the FPGA, and the configuration file of the algorithm control module is preset in the host computer. Different algorithm architectures, different optimization criteria, and different covariance matrix inversion algorithms and other weight calculation methods can be configured according to user requirements. The corresponding configuration file is loaded into the FPGA for operation through FPGA dynamic loading. The information flow of FPGA dynamic loading is as follows: Figure 6 shown.

[0051] Different anti-interference algorithms correspond to different executable files. After the selection is made in the human-computer interaction interface, they are sent to the anti-interference processing module through the network port. After receiving the BIT format file, the onboard processor MCU in the anti-interference processing module unpacks it and writes data to the FPGA in sequence according to the timing requirements and data format of the SelectMAP interface corresponding to the FPGA. After the configuration is successful, the corresponding FPGA will return a Done signal to the processor (MCU, DSP or ARM), indicating that the configuration is successful, and the FPGA starts to run the corresponding configured program. If you need to change the anti-interference algorithm, just re-execute the above process.

[0052] like Figure 7 The figure shows the interaction block diagram between the host and the software. The anti-interference array antenna host supports the configuration of variable array elements. The key is to be able to respond to the configuration parameters of the antenna characteristic modeling software. After the user completes the antenna modeling in the antenna characteristic modeling software, the antenna parameters are sent to the host. On the one hand, the host selects the corresponding processing channel according to the number of array elements and the number of array elements, and overwrites the AD sampling data of the unselected channel with the AD sampling data of the selected channel, thereby obtaining the required AD sampling data and realizing the dynamic zeroing of the number of array elements (for example, when seven array elements are selected, array elements 1 to 8 use the AD sampling data of channels numbered 1, 2, 3, 4, 5, 6, 7, and 7 respectively). On the other hand, the host calculates the path difference of the signal reaching each array element according to the virtual coordinates of the antenna array, and then obtains the steering vector of the signal of different array elements, simulates the corresponding antenna radiation pattern, and completes the hardware implementation of the array antenna model with the number of array elements and array element coordinates set by the software, thereby supporting the simulation of array element properties with an array element number ≤ 8.

[0053] like Figure 8As shown, during the program running, the main status and parameters of the algorithm can be uploaded to the antenna characteristic modeling software through the serial port for real-time monitoring and dynamic display (such as anti-interference weight vector, interference statistical power, etc.). Figure 3 The D viewport displays the composite antenna pattern of the current beam. If you want to switch beams, click the [Show Beam Weight] button to open the beam weight display interface. Figure 7 As shown, switching the beam number can obtain the weight of the corresponding beam and update the antenna pattern.

[0054] The antenna characteristic modeling software covers all possible array layout styles suitable for vehicles, aircraft, missiles, ships and other targets, and also supports single-element antenna models. Users can generate platform antenna models by inputting parameters such as the number of array elements and array layout according to the antenna design. After the array layout is determined, the antenna array delay difference model is calculated as follows. According to the input antenna array, satellite / interference position information, user motion model and other parameter information, pseudo-range delay, carrier phase, pseudo-code delay and other adjustment parameters can be calculated and generated.

[0055] like Fig. 9 As shown, the antenna characteristic modeling software includes each array element coordinate calculation submodule, an array delay difference matrix calculation submodule, an intermediate frequency carrier phase difference calculation submodule, a satellite / interference position calculation module, a satellite DOA calculation module, a receiver position calculation module and a receiver attitude calculation module, wherein the satellite / interference position calculation module, the receiver position calculation module and the receiver attitude calculation module are respectively connected to the satellite DOA calculation module, the satellite DOA calculation module and each array element coordinate calculation submodule are connected to the array delay difference matrix calculation submodule, the array delay difference matrix calculation submodule is connected to the intermediate frequency carrier phase difference calculation submodule, the intermediate frequency carrier phase difference calculation submodule and the array delay difference matrix calculation submodule are connected to the intermediate frequency array signal synthesis module, wherein each array element coordinate calculation submodule is used to calculate each array element coordinate; the array delay difference matrix calculation submodule is used to calculate the array delay difference matrix; the intermediate frequency carrier phase difference calculation submodule is used to calculate the intermediate frequency carrier phase difference; the satellite / interference position calculation module is used to determine the actual satellite position according to the satellite ephemeris parameters; the satellite DOA calculation is used to calculate the navigation / interference signal incident DOA according to the actual satellite position and the actual receiver position and attitude.

[0056] Array delay / phase calculation is closely related to the antenna layout. The antenna characteristic modeling software in the present invention supports circular array, rectangular array, conformal array and other layouts, which can basically cover the layout of anti-interference antennas of various current application platforms.

[0057] like Fig.10 As shown in the figure, in the circular array antenna arrangement, each array element is evenly distributed on a circle with a radius of R. are the elevation angle and azimuth angle of the signal incident direction respectively. The center array element A1 is taken as the coordinate origin, and the line connecting the center array element A1 and the second array element A2 is taken as the X-axis to establish the antenna array coordinate system. The path difference of each element of the N-element central circular array is obtained as follows:

[0058]

[0059] Among them, n = 1, 2, ..., N, the circle radius R = d, the array element spacing is half a wavelength, d = λ0 / 2, λ0 is the carrier wavelength.

[0060] like Fig.11 As shown in the figure, in the rectangular array antenna arrangement, the array elements are evenly distributed at a spacing of d. x *d y At the grid points of are the elevation angle and azimuth angle of the signal incident direction, respectively. 11 The coordinate origin O, point O and the last element A in the first row 1N The connecting line is used as the X-axis to establish the antenna array coordinate system. The path difference of each element of the rectangular array with M rows and N columns is:

[0061]

[0062] Among them, d x is the distance between each row of array elements, d y is the spacing between each row of array elements.

[0063] like Fig.12 As shown in the figure, the conformal array antenna is arranged in such a way that the array elements of each layer are evenly distributed on a circle with a radius of R. are the elevation angle and azimuth angle of the signal incident direction respectively. The coordinate origin is O, the center of the bottom circular array, and the coordinate origin O is the first element A of the bottom circular array. 11 The antenna array coordinate system is established by connecting the lines as the X-axis. The path difference of each element in the M-layer N-element cylindrical conformal array is:

[0064]

[0065] Among them, the number of layers m = 1, 2, ..., M, the number of array elements in each layer n = 1, 2, ..., N, the radius of each circular array R = d / [2cos(π / N)], and the array element spacing is generally half of the wavelength, that is, d = λ0 / 2, where λ0 is the carrier wavelength. z is the distance between layers.

[0066] The cylindrical array is a special case of the conical array. The main difference is that the radius R of each layer of the conical array changes with the height from the bottom layer, while the cylindrical array does not. The specific coordinates of the truncated cone array are:

[0067]

[0068] Among them, R0 is the radius of the bottom circular array; ρ is the inclination angle of the frustum, which is positioned as the angle between the frustum surface and the bottom surface.

[0069] like Fig.13 As shown, the array antenna modeling case is implemented using the above model.

[0070] The array antenna characteristic modeling software is designed with a host computer interface. Users can use the interactive interface to model the antenna array. It mainly provides the following functions:

[0071] a) The array shape can be quickly set, such as circular array, square array, etc., and the spacing between array elements can be adjusted;

[0072] b) The position, attitude, phase offset and antenna pattern of each antenna element can be configured individually;

[0073] c) Supports multi-frequency setting, and different array antennas can be set at different frequencies.

[0074] like Fig.14 and Fig.15 As shown in the figure, above the array antenna editing interface are two three-dimensional antenna patterns. The left one shows the position of each element in the array antenna and its own antenna pattern, and the right one shows the antenna pattern synthesized by all elements. Fig.15 Shown is the antenna pattern of a seven-element array antenna.

[0075] The advantages and positive effects of the present invention are:

[0076] The present invention consists of two parts: antenna characteristic modeling software and an array signal processing host. The antenna characteristic modeling software mainly models the antenna array, and can set parameters including the number of array elements, array element spacing, array element position, antenna radiation pattern, etc., and calculates the path difference of different incoming navigation and interference signals arriving at different array elements of the array antenna with the reference array element as the center, as well as wavefront simulation parameters such as signal power, time delay, and Doppler change value, so as to flexibly simulate the characteristics of different types of array antennas; the array signal processing host mainly executes the anti-interference processing algorithm configured by the user, supports space-time / space-frequency filtering architecture, LMS / SMI / DMI / RLS inversion method, LCMV / MMSE / MSINR constraint criteria, and combination strategies such as zeroing / beaming, so as to flexibly simulate the characteristics of different anti-interference processing modules.

[0077] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention includes but is not limited to the embodiments described in the specific implementation manner. Any other implementation manners derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims

1. A host of anti-interference array antenna with variable array elements, characterized in that: It includes a casing and internal hardware equipped with antenna characteristic modeling software, wherein the internal hardware is installed inside the casing, the internal hardware includes an interference processing unit, a radio frequency signal processing unit and a frame, the interference processing unit is connected to the radio frequency signal processing unit, the interference processing unit and the radio frequency signal processing unit are installed inside the frame, and the frame is used to support the internal hardware.

2. The anti-interference array antenna host with variable array elements according to claim 1, characterized in that: The interference processing unit includes a clock management module, an AD sampling module, a DA conversion module, an anti-interference processing module, an optical port driver and a power management module, wherein the clock management part is used to convert the 10MHz clock and divide it into different channels to provide clock references to the AD sampling module, the DA conversion module and the anti-interference module respectively; the AD sampling module includes 8 AD sampling channels and 4 receiving channels; The DA conversion module includes one intermediate frequency output channel; the anti-interference processing module is used for the logic control of the entire system; the optical port driver includes two optical fiber interfaces, one for transmission and one for reception, for realizing high-speed data interaction between the system and the outside world; the power management part is used to convert the 220V power supply voltage input by the industrial computer into the power supply voltage required by the anti-interference processing unit.

3. The anti-interference array antenna host with variable array elements according to claim 1, characterized in that: The radio frequency signal processing unit includes an intermediate frequency filtering component, a clock management module, a down-conversion radio frequency processing module, an up-conversion processing module, a power management module, and an external interface, wherein the clock management module is used to cache and branch the onboard 10MHz clock to provide clock references to the down-conversion processing module, the up-conversion processing module, and the anti-interference processing unit; the down-conversion radio frequency processing module includes 8 down-conversion input channels, and two four-channel broadband radio frequency chips are selected as down-conversion channels, and the up-conversion processing module includes 1 up-conversion output channel; the radio frequency front-end module is used to filter, amplify and control the power of the input radio frequency signal; the intermediate frequency filter is used to filter the down-converted signal and filter out the high-frequency branch; the external interface includes two RS422 signals, two RS232 signals, and one network port, which are used to complete the data interaction between the system and the external; the power management module is used to convert the 220V voltage input by the industrial computer into various voltages required by the radio frequency signal processing unit.

4. The anti-interference array antenna host with variable array elements according to claim 1, characterized in that: The antenna characteristic modeling software includes each array element coordinate calculation submodule, an array delay difference matrix calculation submodule, an intermediate frequency carrier phase difference calculation submodule, a satellite / interference position calculation module, a satellite DOA calculation module, a receiver position calculation module and a receiver attitude calculation module, wherein the satellite / interference position calculation module, the receiver position calculation module and the receiver attitude calculation module are respectively connected to the satellite DOA calculation module, the satellite DOA calculation module and each array element coordinate calculation submodule are connected to the array delay difference matrix calculation submodule, the array delay difference matrix calculation submodule is connected to the intermediate frequency carrier phase difference calculation submodule, the intermediate frequency carrier phase difference calculation submodule and the array delay difference matrix calculation submodule are connected to the intermediate frequency array signal synthesis module, wherein each array element coordinate calculation submodule is used to calculate each array element coordinate; the array delay difference matrix calculation submodule is used to calculate the array delay difference matrix; the intermediate frequency carrier phase difference calculation submodule is used to calculate the intermediate frequency carrier phase difference; the satellite / interference position calculation module is used to determine the actual position of the satellite according to the satellite ephemeris parameters; the satellite DOA calculation is used to calculate the incident DOA of the navigation / interference signal according to the actual position of the satellite and the actual position and attitude of the receiver.

5. The anti-interference array antenna host with variable array elements according to claim 4, characterized in that: The antenna characteristic modeling software supports circular array antenna layout, rectangular array antenna layout and conformal array antenna layout.

6. The anti-interference array antenna host with variable array elements according to claim 5, characterized in that: In the circular array antenna arrangement, the array elements are evenly distributed on a circle with a radius of R. are the elevation angle and azimuth angle of the signal incident direction respectively. The center array element A1 is taken as the coordinate origin, and the line connecting the center array element A1 and the second array element A2 is taken as the X-axis to establish the antenna array coordinate system. The path difference of each element of the N-element central circular array is obtained as follows: Among them, n = 1, 2, ..., N, the circle radius R = d, the array element spacing is half a wavelength, d = λ0 / 2, λ0 is the carrier wavelength.

7. The anti-interference array antenna host with variable array elements according to claim 5, characterized in that: In the rectangular array antenna arrangement, each array element is evenly distributed at a spacing of d x *d y At the grid points of are the elevation angle and azimuth angle of the signal incident direction, respectively. 11 The coordinate origin O, point O and the last element A in the first row 1N The connecting line is used as the X-axis to establish the antenna array coordinate system. The path difference of each element of the rectangular array with M rows and N columns is: Among them, d x is the distance between each row of array elements, d y is the spacing between each row of array elements.

8. The anti-interference array antenna host with variable array elements according to claim 5, characterized in that: In the conformal array antenna arrangement method, each array element of each layer is evenly distributed on a circle with a radius of R, θ, are the elevation angle and azimuth angle of the signal incident direction respectively. The coordinate origin is O, the center of the bottom circular array, and the coordinate origin O is the first element A of the bottom circular array. 11 The antenna array coordinate system is established by connecting the lines as the X-axis. The path difference of each element in the M-layer N-element cylindrical conformal array is: Among them, the number of layers m = 1, 2, ..., M, the number of array elements in each layer n = 1, 2, ..., N, the radius of each circular array R = d / [2cos(π / N)], and the array element spacing is generally half of the wavelength, that is, d = λ0 / 2, where λ0 is the carrier wavelength. z is the distance between layers.

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