An external radiation source radar signal acquisition and processing system

Abstract

The application discloses a kind of external radiation source radar signal acquisition processing systems, belong to radar signal processing technical field, with strong universality, and acquisition processing efficiency is high.System includes: the multi-channel software radio receiver and workstation connected with each other;Wherein, the workstation includes positioning mode selection module, the workstation sends the positioning mode of external radiation source radar signal acquisition processing to the multi-channel software radio receiver by the positioning mode selection module;The multi-channel software radio receiver is used to receive the positioning mode, according to the positioning mode to external radiation source radar signal acquisition, obtains the multi-channel signal data corresponding to the positioning mode;The workstation is used to receive the multi-channel signal data sent by the multi-channel software radio receiver, processes the multi-channel signal data, obtains the detection positioning result of external radiation source radar signal.

Description

Technical Field

[0001] This invention relates to the field of radar signal processing technology, and in particular to a radar signal acquisition and processing system for an external radiation source. Background Technology

[0002] External radiation source radar refers to a system that does not radiate electromagnetic signals itself, but rather detects targets by utilizing the electromagnetic signals reflected from them. It is similar to traditional bistatic / multistatic radar, but differs in that it lacks a transmitter; instead, it utilizes existing civilian signals in space. It has attracted widespread attention due to its advantages such as high concealment, low power consumption, strong anti-interference capabilities, and long operating range. Technological advancements have led to the generation of increasingly more civilian signals. Following broadcast signals, television signals, second- and third-generation wireless communication signals such as GSM and CDMA, and GPS have emerged, providing more possibilities for external radiation source detection systems to find suitable external radiation sources. However, because the signal processing algorithms of external radiation source radar are more complex than those of traditional radar, and the signal bandwidth is larger (sampling rates typically exceeding 10MHz), and the clutter suppression algorithms used in signal processing are more complex, external radiation source radar processes a larger amount of data and requires more computation. This places a significant demand on data processing capabilities.

[0003] In existing technologies, the positioning methods for acquiring and processing radar signals from external radiation sources cannot adapt to different application scenarios and have poor versatility. Summary of the Invention

[0004] Based on the above analysis, the embodiments of the present invention aim to provide an external radiation source radar signal acquisition and processing system that is applicable to various external radiation source radar signals, has strong versatility, and high acquisition and processing efficiency.

[0005] This invention discloses a radar signal acquisition and processing system for an external radiation source, comprising:

[0006] Interconnected multi-channel software radio receivers and workstations;

[0007] The workstation includes a positioning mode selection module, through which the workstation transmits the positioning mode for external radiation source radar signal acquisition and processing to the multi-channel software radio receiver;

[0008] The multi-channel software radio receiver is used to receive the positioning method, collect radar signals from external radiation sources according to the positioning method, and obtain multi-channel signal data corresponding to the positioning method.

[0009] The workstation is used to receive the multi-channel signal data transmitted by the multi-channel software radio receiver, process the multi-channel signal data, and obtain the detection and positioning results of the external radiation source radar signal.

[0010] Furthermore, the positioning mode selection module has a built-in target signal correlation parameter detection module, or the target signal correlation parameter detection module is built into the workstation and connected to the positioning mode selection module;

[0011] The target signal correlation parameter detection module is used to detect target signal correlation parameters corresponding to the application scenario, specifically including:

[0012] The target signal correlation parameters corresponding to the first application scenario are the number of external radiation source radar signals and the quality parameters of the external radiation source radar signals.

[0013] The target signal correlation parameters corresponding to the second application scenario are the number of direct wave receiving channels and the number of echo signal receiving channels.

[0014] Furthermore, the positioning method selection module is also used for:

[0015] Based on the comparison results between the target signal association parameters and their respective preset association parameter thresholds, the corresponding positioning method for external radiation source radar signal acquisition and processing is selected.

[0016] Furthermore, the positioning method selection module is also specifically used for:

[0017] The application scenario described is the first application scenario:

[0018] If the number of external radiation source radar signals is greater than or equal to 2, and at least 2 of the external radiation source radar signals have quality parameters greater than or equal to the preset external radiation source radar signal quality parameter threshold, then the corresponding external radiation source radar signal acquisition and processing positioning method is selected as time difference positioning method.

[0019] If less than two of the external radiation source radar signal quality parameters are greater than or equal to the preset external radiation source radar signal quality parameter threshold, then the corresponding external radiation source radar signal acquisition and processing positioning method is the direction finding-time difference joint positioning method.

[0020] The application scenario described is the second application scenario:

[0021] If the number of direct wave receiving channels is greater than or equal to 2, and the number of echo signal receiving channels is greater than or equal to 2, then the corresponding external radiation source radar signal acquisition and processing positioning method is time difference positioning.

[0022] If the number of direct wave receiving channels is equal to 1 and the number of echo signal receiving channels is greater than or equal to 3, then the corresponding external radiation source radar signal acquisition and processing positioning method is the direction finding-time difference joint positioning method.

[0023] Furthermore, the multi-channel software radio receiver includes a signal data acquisition module, which is connected to the positioning mode selection module;

[0024] The signal data acquisition module is used for:

[0025] The system receives the positioning mode for external radiation source radar signal acquisition and processing sent by the positioning mode selection module, acquires external radiation source radar signals according to the positioning mode, and obtains multi-channel signal data corresponding to the positioning mode.

[0026] Furthermore, the workstation also includes a target algorithm module, which is connected to the positioning method module;

[0027] The target positioning algorithm corresponding to the positioning method is used to determine the target positioning algorithm so that the workstation can process the multi-channel signal data according to the target positioning algorithm to obtain the detection and positioning result of the external radiation source radar signal.

[0028] Furthermore, the workstation also includes a CPU, wherein:

[0029] The workstation is connected to the signal data acquisition module via the CPU, and is used to receive the multi-channel signal data sent to the workstation by the signal data acquisition module, initialize the signal acquisition and processing parameters of the multi-channel signal data, and release the storage space.

[0030] The CPU is also connected to the target algorithm module and is used to detect and locate the processed external radiation source radar signal according to the target localization algorithm.

[0031] Furthermore, the workstation also includes a GPU connected to the CPU, wherein:

[0032] The GPU is used to solve the problem from the multi-channel signal data through echo signals after the CPU releases the storage space, and extract the data required for detection and positioning.

[0033] Segmented pulse compression is performed on the data required for detection and positioning;

[0034] Migration correction is performed on the segmented pulse compressed signal;

[0035] The migration-corrected signal is subjected to range-Doppler processing to obtain the range-Doppler processing result, and the range-Doppler processing result is sent to the CPU so that the CPU can detect and locate the external radiation source radar signal according to the target localization algorithm and the range-Doppler processing result.

[0036] Furthermore, the workstation also includes a working parameter deployment module, which is connected to the multi-channel software radio receiver and is used for:

[0037] The operating parameters of the multi-channel software radio receiver are deployed through the operating parameter deployment module.

[0038] Furthermore, both the multi-channel software radio receiver and the workstation are equipped with 10 Gigabit fiber optic interfaces, through which the multi-channel data collected by the multi-channel software radio receiver is transmitted to the workstation in real time.

[0039] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0040] The external radiation source radar signal acquisition and processing system provided by this invention includes a multi-channel software-defined radio receiver and a workstation connected to each other. The workstation sends the positioning mode for external radiation source radar signal acquisition and processing to the multi-channel software-defined radio receiver via a positioning mode selection module. The multi-channel software-defined radio receiver uses the positioning mode to acquire external radiation source radar signals, obtaining multi-channel signal data. The workstation processes the multi-channel signal data to obtain the detection and positioning results of the external radiation source radar signals. This system has strong versatility and high acquisition and processing efficiency.

[0041] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0042] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0043] Figure 1 This is a schematic diagram of the external radiation source radar signal acquisition and processing system in an embodiment of the present invention;

[0044] Figure 2 This is a schematic diagram illustrating the selection of positioning methods in an embodiment of the present invention;

[0045] Figure 3 This is a schematic diagram illustrating the process of a workstation processing multi-channel signal data in an embodiment of the present invention;

[0046] Figure 4 This is a schematic diagram of the structure of an external radiation source radar signal acquisition and processing system according to another embodiment of the present invention;

[0047] Figure 5 This is a schematic diagram of the structure of an external radiation source radar signal acquisition and processing system according to another embodiment of the present invention;

[0048] Figure 6 This is a schematic diagram of the structure of an external radiation source radar signal acquisition and processing system according to another embodiment of the present invention. Detailed Implementation

[0049] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0050] A specific embodiment of the present invention discloses an external radiation source radar signal acquisition and processing system, the structural diagram of which is shown below. Figure 1 As shown, a multi-channel software radio receiver 1 and a workstation 2 are interconnected;

[0051] The workstation 2 includes a positioning mode selection module. The workstation 2 sends the positioning mode for external radiation source radar signal acquisition and processing to the multi-channel software radio receiver 1 through the positioning mode selection module. The positioning modes include time difference positioning mode and direction finding-time difference joint positioning mode. Both of these positioning modes are existing positioning modes and will not be described in detail.

[0052] The multi-channel software radio receiver 1 is used to receive the positioning method, collect radar signals from external radiation sources according to the positioning method, and obtain multi-channel signal data corresponding to the positioning method; such as Figure 2 As shown, if the time difference positioning method is selected, two direct wave signal data and two echo signal data are required; if the direction finding-time difference joint positioning method is selected, one direct wave signal data and three echo signal data are required.

[0053] The workstation 2 is used to receive the multi-channel signal data transmitted by the multi-channel software radio receiver 1, process the multi-channel signal data, and obtain the detection and positioning results of the external radiation source radar signal. For example... Figure 3 As shown, processing the multi-channel signal data to obtain the detection and location results of the external radiation source radar signal can include:

[0054] The CPU in the workstation is mainly responsible for signal acquisition and processing parameter initialization (including memory and video memory allocation, cache distribution), releasing storage space, and detection and localization. The GPU performs accelerated calculations for the processing algorithms. The main algorithms performed by the GPU include: echo signal solving (ECA-B algorithm), segmented pulse compression, migration correction, and range-Doppler processing.

[0055] Workstation 2 can use a high-performance GPU workstation to process multi-channel signal data, thereby obtaining the detection and location results of the external radiation source radar signal. In some embodiments of the present invention, the high-performance GPU workstation includes a CPU and a high-performance GPU connected by an internal bus. The CPU is the central processing unit of the mobile workstation and is the final execution unit for information processing and program execution; the GPU, also known as a display core, visual processor, or display chip, is a microprocessor specifically designed for image and graphics-related computations. Since processing multi-channel signal data is quite complex, it is recommended to use a high-performance GPU workstation with high hardware configuration, such as one equipped with a TESLA v100 graphics card (GPU) and an Intel i9-10900K processor (CPU).

[0056] Furthermore, such as Figure 4 and Figure 5 As shown, the positioning mode selection module has a built-in target signal correlation parameter detection module, or the target signal correlation parameter detection module is built into the workstation 2 and connected to the positioning mode selection module;

[0057] The target signal correlation parameter detection module is used to detect target signal correlation parameters corresponding to the application scenario, which includes a first application scenario and a second application scenario.

[0058] The first application scenario includes detecting external radiation source radar signals; the second application scenario includes detecting pre-deployed direct wave receiving antennas and echo signal receiving antennas.

[0059] The target signal correlation parameters corresponding to the first application scenario are the number of external radiation source radar signals and the quality parameters of the external radiation source radar signals. To achieve the purpose of target location detection, the number of external radiation source radar signals must be at least one. The target location refers to the position of the target detected by the external radiation source radar.

[0060] Signal quality parameters of external radiation source radar can include signal-to-noise ratio (SNR), which measures the quality of the external radiation source radar signal. The higher the SNR value, the better the signal quality of the external radiation source radar; the lower the SNR value, the worse the signal quality of the external radiation source radar.

[0061] The target signal correlation parameters corresponding to the second application scenario are the number of direct wave receiving channels and the number of echo signal receiving channels. In order to achieve the purpose of detecting and locating the target position, the number of direct wave receiving channels must be at least 1, the number of echo signal receiving channels must be at least 2, and the total number of direct wave receiving channels and echo signal receiving channels must be at least 4.

[0062] Furthermore, the positioning method selection module is also used for:

[0063] Based on the comparison results between the target signal association parameters and their respective preset association parameter thresholds, the corresponding positioning method for external radiation source radar signal acquisition and processing is selected.

[0064] Furthermore, based on the comparison results between the target signal correlation parameters and their respective corresponding preset correlation parameter thresholds, the appropriate positioning method for external radiation source radar signal acquisition and processing is selected. The positioning method selection module is also specifically used for:

[0065] The application scenario described is the first application scenario:

[0066] If the number of external radiation source radar signals is greater than or equal to 2, and at least 2 of the external radiation source radar signals have quality parameters greater than or equal to the preset external radiation source radar signal quality parameter threshold, then the corresponding external radiation source radar signal acquisition and processing positioning method is selected as time difference positioning method.

[0067] If less than two of the external radiation source radar signal quality parameters are greater than or equal to the preset external radiation source radar signal quality parameter threshold, then the corresponding external radiation source radar signal acquisition and processing positioning method is the direction finding-time difference joint positioning method.

[0068] The preset correlation parameter threshold corresponding to the number of external radiation source radar signals is 2; the preset correlation parameter threshold corresponding to the external radiation source radar signal quality parameter is the preset signal quality parameter threshold, and the external radiation source radar signal quality parameter can be specifically the signal-to-noise ratio, and the preset signal quality parameter threshold can be specifically the preset signal-to-noise ratio threshold.

[0069] If the number of external radiation source radar signals is greater than or equal to two, and at least two of the external radiation source radar signals have quality parameters greater than or equal to a preset external radiation source radar signal quality parameter threshold, then the corresponding external radiation source radar signal acquisition and processing positioning method is time difference positioning. That is, when there are at least two radiation source radar signals with good signal quality, the positioning method is time difference positioning; including the following situations:

[0070] When there are two external radiation source radar signals, and the quality parameters of these two external radiation source radar signals are both greater than or equal to the radiation source radar signal quality parameter threshold.

[0071] When there are 3 or more external radiation source radar signals, the quality parameters of 2 or more of these external radiation source radar signals are greater than or equal to the radiation source radar signal quality parameter threshold.

[0072] If the quality parameters of fewer than two external radiation source radar signals are greater than or equal to a preset external radiation source radar signal quality parameter threshold, then the corresponding external radiation source radar signal acquisition and processing positioning method is the direction-finding-time difference joint positioning method. That is, if there is one radiation source radar signal or no signal with good quality, then the positioning method is the direction-finding-time difference joint positioning method, including the following situations:

[0073] When the number of external radiation source radar signals is equal to one or more, but only one external radiation source radar signal has a quality parameter greater than or equal to the radiation source radar signal quality parameter threshold.

[0074] When the number of external radiation source radar signals is equal to 1 or more, but no external radiation source radar signal has a quality parameter greater than or equal to the radiation source radar signal quality parameter threshold.

[0075] Among them, the time difference positioning method and the direction finding-time difference joint positioning method are existing positioning methods, and will not be described in detail.

[0076] The application scenario described is the second application scenario:

[0077] If the number of direct wave receiving channels is greater than or equal to 2, and the number of echo signal receiving channels is greater than or equal to 2, then the corresponding external radiation source radar signal acquisition and processing positioning method is time difference positioning.

[0078] If the number of direct wave receiving channels is equal to 1 and the number of echo signal receiving channels is greater than or equal to 3, then the corresponding external radiation source radar signal acquisition and processing positioning method is the direction finding-time difference joint positioning method.

[0079] The preset correlation parameter threshold corresponding to the number of direct wave receiving channels is 2; the preset correlation parameter threshold corresponding to the number of echo signal receiving channels can be determined based on the preset correlation parameter threshold corresponding to the number of direct wave receiving channels, and can be 2 or 3, so that the total number of direct wave receiving channels and echo signal receiving channels is at least 4.

[0080] If the number of direct wave receiving channels is greater than or equal to 2, and the number of echo signal receiving channels is greater than or equal to 2, then the corresponding external radiation source radar signal acquisition and processing positioning method is time difference positioning.

[0081] If the number of direct wave receiving channels is 1 and the number of echo signal receiving channels is 3 or more, then the corresponding external radiation source radar signal acquisition and processing positioning method is the direction finding-time difference joint positioning method. It should be noted that: if the number of direct wave receiving channels is 1, then the preset correlation parameter threshold corresponding to the number of echo signal receiving channels is set to 3; if the number of direct wave receiving channels is 2 or more, then the preset correlation parameter threshold corresponding to the number of echo signal receiving channels is set to 2.

[0082] Furthermore, such as Figure 1 As shown, the multi-channel software radio receiver 1 includes a signal data acquisition module, one end of which is connected to the positioning mode selection module; the other end of which is connected to the workstation 2.

[0083] The signal data acquisition module is used for:

[0084] The system receives the positioning method for external radiation source radar signal acquisition and processing sent by the positioning method selection module. Based on this positioning method, it acquires external radiation source radar signals to obtain multi-channel signal data corresponding to the positioning method. The signal data acquisition module can acquire external radiation source radar signals. Specifically, under set operating parameters, the signals received by the external radiation source radar signal receiving antenna array are synchronously acquired across multiple channels to obtain multi-channel signal data.

[0085] Furthermore, the workstation 2 also includes a target algorithm module, which is connected to the positioning method module;

[0086] This is used to determine the target positioning algorithm corresponding to the positioning method, so that the workstation 2 can process the multi-channel signal data according to the target positioning algorithm to obtain the detection and positioning result of the external radiation source radar signal. For example... Figure 2 As shown, if the time difference positioning method is selected, the corresponding multi-channel software radio receiver 1 needs to be configured with two direct wave channels and two echo signal channels. The corresponding target positioning algorithm is a time difference estimation algorithm using two stations; the time difference estimation algorithm using two stations is an existing algorithm.

[0087] When the direction-finding-time difference (TDD) joint positioning method is selected, the corresponding multi-channel software radio receiver 1 needs to be configured with one direct wave channel and three echo channels. The corresponding target positioning algorithm is a combined algorithm; the combined algorithm is an algorithm that combines the target azimuth estimation algorithm obtained by array direction finding with the time difference estimation algorithm using bi-stations. Since the positioning effect of the direction-finding-TDD joint positioning method is not as good as that of the time difference positioning method, a combined algorithm is adopted to make the positioning of the direction-finding-TDD joint positioning method more accurate. The target azimuth estimation algorithm obtained by array direction finding is an existing algorithm.

[0088] Furthermore, such as Figure 3 As shown, the workstation 2 also includes a CPU, wherein:

[0089] The workstation 2 is connected to the signal data acquisition module via the CPU, and is used to receive the multi-channel signal data sent to the workstation 2 by the signal data acquisition module, initialize the signal acquisition and processing parameters of the multi-channel signal data, and release the storage space.

[0090] The CPU is also connected to the target algorithm module and is used to detect and locate the processed external radiation source radar signal according to the target localization algorithm.

[0091] Furthermore, such as Figure 3 As shown, the workstation 2 also includes a GPU connected to the CPU, wherein:

[0092] The GPU is used to solve the echo signals from the multi-channel signal data after the CPU releases its storage space, and extract the data required for detection and localization. The purpose of echo signal solving is to extract the data needed for target detection and localization from a large amount of redundant signal data. In specific implementation, the Extended Cancellation Algorithm-B (ECA-B) can be used to perform clutter suppression processing on one reference signal data and multiple echo signal data in parallel. First, a sliding matrix is ​​constructed, and then the echo signals are solved. Since the echo signal solving mainly includes a series of matrix operations such as matrix multiplication and matrix inversion, it can be completed using APIs from libraries such as cuBLAS.

[0093] The data required for detection and positioning is segmented into pulses and compressed. Segmented pulse compression can reduce computational load by using signal segmentation, fast time-dimensional signal FFT, conjugate multiplication, and slow time-dimensional filtering and decimation. Signal segmentation and slow time-dimensional filtering and decimation are implemented using kernel functions, while fast time-dimensional signal FFT and conjugate multiplication can be implemented by calling APIs from libraries such as cuFFT.

[0094] Migration correction is performed on the segmented pulse compressed signal. First, the segmented pulse compressed signal is subjected to slow-time dimensional windowing and slow-time CZT transform. The slow-time dimensional windowing can be implemented by reading coefficients pre-stored in the video memory.

[0095] The coefficients required for CZT can be stored in GPU memory and accessed later, which speeds up computation. Then, IFFT is performed on the slower time dimension to complete the migration correction.

[0096] The migration-corrected signal is subjected to range-Doppler processing to obtain the range-Doppler processing result, which is then sent to the CPU. The CPU then uses the target localization algorithm and the range-Doppler processing result to detect and locate the external radiation source radar signal. The CPU can also use the target localization algorithm to detect and locate the processed external radiation source radar signal.

[0097] Furthermore, the workstation 2 also includes a working parameter deployment module, which is connected to the multi-channel software radio receiver 1 and is used for:

[0098] The operating parameters of the multi-channel software-defined radio receiver 1 are deployed through the operating parameter deployment module. The operating parameters of the multi-channel software-defined radio receiver 1 can be deployed at workstation 2. Since obtaining the target's two-dimensional positioning result requires at least two sets of time difference estimates for time difference positioning; or the angle estimate obtained from three array antennas combined with one time difference estimate for direction finding-time difference joint positioning, the multi-channel software-defined radio receiver 1 is required to have at least four channels for simultaneous reception. The operating parameters of the multi-channel software-defined radio receiver 1 include, but are not limited to, the carrier frequency of the external radiation source signal, the multi-channel local oscillator sharing mode, the receiver GPS selection, the signal sampling rate, the acquisition signal bandwidth, the acquisition duration, and the channel receiving gain.

[0099] Furthermore, both the multi-channel software radio receiver 1 and the workstation 2 are equipped with 10 Gigabit fiber optic interfaces, through which the multi-channel data collected by the multi-channel software radio receiver 1 is transmitted to the workstation 2 in real time.

[0100] like Figure 6 As shown, the multi-channel software radio receiver 1 and workstation 2 (corresponding) Figure 6 The high-performance GPU workstation connects via a 10GbE SFP+ interface.

[0101] Workstation 2 performs parameter setting, signal data reception, and signal data processing functions for the multi-channel software-defined radio receiver; the multi-channel software-defined radio receiver performs signal data acquisition functions; all the above connections are bidirectional, enabling bidirectional transmission of control commands and data. In specific implementation, the multi-channel software-defined radio receiver 310 can be implemented using the Ettus USRP X310 software-defined radio platform in conjunction with two TwinRX RF daughterboards. This configuration is a superheterodyne receiver, capable of synchronously acquiring radio signals in the 10MHz to 6GHz frequency range across four channels, with a sampling rate of up to 100MHz per channel, and features two 10GbE SFP+ data transmission interfaces for high-speed data transmission.

[0102] This invention employs a 10 Gigabit fiber optic interface to transmit multi-channel data acquired by a multi-channel software-defined radio receiver to the workstation in real time. The CPU is primarily responsible for initializing signal acquisition and processing parameters, as well as detection and positioning. The GPU performs accelerated computation of the processing algorithm, enabling real-time acquisition and processing of radar signals from external radiation sources.

[0103] Compared with existing technologies, the external radiation source radar signal acquisition and processing system provided by this invention includes a multi-channel software-defined radio receiver and a workstation connected to each other. The workstation sends the positioning mode for external radiation source radar signal acquisition and processing to the multi-channel software-defined radio receiver through a positioning mode selection module. The multi-channel software-defined radio receiver uses the positioning mode to acquire external radiation source radar signals, obtaining multi-channel signal data. The workstation processes the multi-channel signal data to obtain the detection and positioning results of the external radiation source radar signals. This system has strong versatility and high acquisition and processing efficiency.

[0104] Those skilled in the art will understand that all or part of the processes of the methods described in the above embodiments can be implemented by a computer program instructing related hardware, and the program can be stored in a computer-readable storage medium. The computer-readable storage medium may be a disk, optical disk, read-only memory, or random access memory, etc.

[0105] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A radar signal acquisition and processing system for an external radiation source, characterized in that, Comprise: A multi-channel software radio receiver and a workstation connected with each other; The workstation comprises a positioning mode selection module, and the workstation sends a positioning mode of external emitter radar signal collection and processing to the multi-channel software radio receiver through the positioning mode selection module; The multi-channel software radio receiver is configured to receive the positioning mode, collect external emitter radar signals according to the positioning mode, and obtain multi-channel signal data corresponding to the positioning mode; The workstation is configured to receive the multi-channel signal data sent by the multi-channel software radio receiver, process the multi-channel signal data, and obtain a detection and positioning result of the external emitter radar signal; The positioning mode selection module is further configured to: If the number of external emitter radar signals is greater than or equal to 2, and at least two external emitter radar signal quality parameters are greater than or equal to a preset external emitter radar signal quality parameter threshold, a corresponding positioning mode of external emitter radar signal collection and processing is a time difference positioning mode; If less than two external emitter radar signal quality parameters are greater than or equal to the preset external emitter radar signal quality parameter threshold, a corresponding positioning mode of external emitter radar signal collection and processing is a direction-finding-time difference joint positioning mode; If the number of direct wave receiving channels is greater than or equal to 2, and the number of echo signal receiving channels is greater than or equal to 2, a corresponding positioning mode of external emitter radar signal collection and processing is a time difference positioning mode; If the number of direct wave receiving channels is equal to 1, and the number of echo signal receiving channels is greater than or equal to 3, a corresponding positioning mode of external emitter radar signal collection and processing is a direction-finding-time difference joint positioning mode. The positioning mode selection module is built-in with a target signal correlation parameter detection module, or the target signal correlation parameter detection module is built-in in the workstation and connected with the positioning mode selection module; The target signal correlation parameter detection module is configured to detect target signal correlation parameters corresponding to the application scenario, and specifically comprises:

2. The Volumetric Video Coding System of claim 1, wherein, The target signal correlation parameters corresponding to the first application scenario are the number of external emitter radar signals and the external emitter radar signal quality parameters; The target signal correlation parameters corresponding to the second application scenario are the number of direct wave receiving channels and the number of echo signal receiving channels. The positioning mode selection module is further configured to: According to a comparison result of the target signal correlation parameters and respective preset correlation parameter thresholds, a corresponding positioning mode of external emitter radar signal collection and processing is selected.

3. The Volumetric Video Coding System of claim 2, wherein, The multi-channel software radio receiver comprises a signal data collection module connected with the positioning mode selection module; The signal data collection module is configured to:

4. The Volumetric Video Coding method of claim 1, wherein, Receive a positioning mode of external emitter radar signal collection and processing sent by the positioning mode selection module, collect external emitter radar signals according to the positioning mode, and obtain multi-channel signal data corresponding to the positioning mode. ​ ​ 5. The Volumetric Video Coding System of claim 4, wherein, The workstation further comprises a target algorithm module connected with the positioning mode selection module; A target positioning algorithm corresponding to the positioning mode is determined, so that the workstation processes the multi-channel signal data according to the target positioning algorithm to obtain a detection positioning result of the ESM radar signal.

6. The external radiation source radar signal acquisition and processing system according to claim 5, characterized in that, The workstation further comprises a CPU, wherein: The workstation is connected with the signal data acquisition module through the CPU, and is configured to receive the multi-channel signal data sent by the signal data acquisition module to the workstation, initialize signal acquisition processing parameters of the multi-channel signal data, and release storage space; The CPU is further connected with the target algorithm module, and is configured to perform detection positioning on the processed ESM radar signal according to the target positioning algorithm.

7. The Volumetric Video Coding System of claim 6, wherein, The workstation further comprises a GPU connected with the CPU, wherein: The GPU is configured to, after the CPU releases the storage space, solve echo signals from the multi-channel signal data, and extract data required for detection positioning; The data required for detection positioning is subjected to segmental pulse compression; The segmentally pulse compressed signal is subjected to migration correction; The migration corrected signal is subjected to range-Doppler processing to obtain a range-Doppler processing result, and the range-Doppler processing result is sent to the CPU, so that the CPU performs detection positioning on the ESM radar signal according to the target positioning algorithm and the range-Doppler processing result.

8. The external radiation source radar signal acquisition and processing system according to claim 1, characterized in that, The workstation further comprises a working parameter deployment module connected with the multi-channel software radio receiver, and is configured to: Deploy working parameters of the multi-channel software radio receiver through the working parameter deployment module.

9. The Volumetric Video Coding System of claim 1, wherein, Both the multi-channel software radio receiver and the workstation are equipped with a gigabit optical fiber interface, and the multi-channel data collected by the multi-channel software radio receiver is transmitted to the workstation in real time through the gigabit optical fiber interface.

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