Digital array passive external source integrated information fusion device and method

Abstract

The application discloses a kind of digital array passive external source integrated information fusion device and method, including comprehensive aperture antenna, for receiving target radar radiation source electromagnetic signal in the preset frequency range reconnaissance range and the radio frequency signal of target reflection by external radiation source;Radio frequency front end, for the first time pre-processing radio frequency signal;Frequency conversion receiving channel, for the second time pre-processing radio frequency signal of first time processing;Digital acquisition module, for the digitization processing of second time pre-processing radio frequency signal, obtain baseband I / Q data;Comprehensive processing module, for forming passive reconnaissance target parameter information and external source detection target track information according to baseband I / Q data;Information fusion module, for the fusion correlation of passive reconnaissance target parameter information and external source detection target track information, obtain passive external source integrated fusion information.The application realizes the positioning, tracking and plate processing of moving target in reconnaissance range.

Description

Technical Field

[0001] The present invention relates to the field of radar information processing technology, and in particular to a digital array passive and external source integrated information fusion device and method. Background Art

[0002] In fields such as communications, radar, electronic reconnaissance, and remote control and telemetry, radio systems convert electromagnetic waves into electrical signals through receiving antennas. These signals are then fed into receivers for frequency conversion acquisition, detection, and analysis. The results are then sent to a data processing module for further processing. The receiving system is a core component of the radio system. With technological advancements, the variety, intensity, and bandwidth of radio signals continue to increase, requiring receivers and data processors to possess broadband reception, high-probability interception, simultaneous multi-source signal processing, and multi-source information fusion capabilities in complex electromagnetic environments. This demand is particularly evident in the fields of external radiation source detection and electronic reconnaissance.

[0003] To address this issue, broadband array multi-beam technology has been developed. This technology can be categorized into optically controlled array multi-beam technology, analog array multi-beam technology, and digital array multi-beam technology. Optically controlled array multi-beam technology is still in the critical technology development phase and suffers from shortcomings such as high link loss, high noise figure, small dynamic range, reliance on imported components, and poor stability. Analog array multi-beam technology requires a large system footprint and suffers from a low cost-performance ratio when the number of beams is large. Digital array multi-beam technology offers flexible beamforming, wide spatial coverage, high gain, integrated spatial, frequency, and temporal processing, strong adaptability to complex electromagnetic environments, and the ability to be redeveloped and expanded.

[0004] However, when using digital array multi-beam technology to design a reconnaissance system, under the condition of limited processing resources, how to fuse passive reconnaissance results and external detection results to form an integrated intelligence design, effectively improve system integration and enrich intelligence content, has become a very valuable research topic. This requires finding a new method to realize passive and external integrated technology. Summary of the Invention

[0005] In order to solve the technical problems existing in the background technology, the present invention proposes a digital array passive and external source integrated information fusion device and method.

[0006] The present invention proposes a digital array passive and external integrated information fusion device, comprising:

[0007] A synthetic aperture antenna is used to receive electromagnetic signals from target radar radiation sources within a preset frequency band reconnaissance range and radio frequency signals from external radiation sources reflected by the target;

[0008] RF front end, used for pre-processing RF signals;

[0009] Frequency conversion receiving channel, used for secondary pre-processing of the once processed RF signal;

[0010] The digital acquisition module is used to digitize the secondary pre-processed RF signal to obtain baseband I / Q data;

[0011] Comprehensive processing module, used to generate passive reconnaissance target parameter information and external detection target track information based on baseband I / Q data;

[0012] The information fusion module is used to fuse and associate the passive reconnaissance target parameter information and the target track information of external detection to obtain passive and external integrated fusion information; wherein, the passive and external integrated fusion information includes the target's location and detailed radiation source parameter information.

[0013] Preferably, the information fusion module is used to fuse and associate the passive reconnaissance target parameter information and the target track information detected by the external source to obtain the passive and external source integrated fusion information, specifically including:

[0014] The information fusion module is used to respectively observe the passive reconnaissance target parameter information and the target track information detected by the external source for the i-th time: i = 1, 2, ..., n, where n is a positive integer greater than 2;

[0015] Feature extraction is performed on the passive reconnaissance target parameter information and the target track information detected by external sources observed for the i-th time to obtain passive features and external features;

[0016] Fuse the passive features and exogenous features to obtain the i-th fusion result;

[0017] Determine whether the fusion result is the same as the i-1 fusion result;

[0018] If so, improve the confidence of the i-th fusion result;

[0019] If not, reduce the confidence of the i-th fusion result;

[0020] Determine whether the confidence level of the i-th fusion result meets the preset requirements or receives a stop fusion instruction;

[0021] If so, the i-th fusion result is output as passive and external source integrated fusion information;

[0022] If not, set i=i+1 and perform an iterative loop until the confidence level of the i-th fusion result reaches the preset requirement or a stop fusion instruction is received.

[0023] Preferably, the passive features and the exogenous features are fused to obtain the i-th fusion result, which specifically includes:

[0024] The decision layer fusion technology is used to fuse the passive features and exogenous features to obtain the i-th fusion result.

[0025] Preferably, the comprehensive processing module is used to form passive reconnaissance target parameter information and external detection target track information based on the baseband I / Q data, specifically including:

[0026] The integrated processing module is used to perform beamforming processing on the baseband I / Q data to obtain first beam data and second beam data;

[0027] Perform parameter measurement, signal sorting, batch compilation and batch processing on the first beam data to form passive reconnaissance target parameter information;

[0028] The second beam data is subjected to echo detection and point track processing to form target track information detected by external sources.

[0029] Preferably, it also includes a distributed power supply module, which is used to power the radio frequency front end, the frequency conversion receiving channel, the integrated processing module and the information fusion module.

[0030] Preferably, the primary pre-processing includes limiting, filtering, amplifying and correcting input coupling.

[0031] Preferably, the secondary preprocessing includes two frequency conversions, filtering and amplification.

[0032] Preferably, the digital processing includes digital acquisition, digital down-conversion and decimation filtering.

[0033] The present invention also proposes a digital array passive and external integrated information fusion method, comprising:

[0034] Receive electromagnetic signals from target radar radiation sources within the preset frequency band reconnaissance range and radio frequency signals from external radiation sources reflected by the target;

[0035] Performing a pre-processing on the radio frequency signal;

[0036] Performing secondary preprocessing on the once processed radio frequency signal;

[0037] Digitally process the secondary pre-processed RF signal to obtain baseband I / Q data;

[0038] Generate passive reconnaissance target parameter information and external detection target track information based on baseband I / Q data;

[0039] The passive reconnaissance target parameter information and the target track information of external detection are fused and associated to obtain the passive-external integrated fusion information; wherein, the passive-external integrated fusion information includes the target's position and detailed radiation source parameter information.

[0040] Preferably, forming the passive reconnaissance target parameter information and the target track information detected by the external source according to the baseband I / Q data specifically includes:

[0041] Performing beamforming processing on the baseband I / Q data to obtain first beam data and second beam data;

[0042] Perform parameter measurement, signal sorting, batch compilation and processing on the first beam data to form passive reconnaissance target parameter information;

[0043] The second beam data is subjected to echo detection and point track processing to form target track information detected by external sources.

[0044] Preferably, the passive reconnaissance target parameter information and the target track information detected by the external source are fused and associated to obtain the passive and external source integrated fusion information, which specifically includes:

[0045] The passive reconnaissance target parameter information and the external detection target track information are observed for the i-th time: i = 1, 2, ..., n, where n is a positive integer greater than 2;

[0046] Feature extraction is performed on the passive reconnaissance target parameter information and the target track information detected by external sources observed for the i-th time to obtain passive features and external features;

[0047] Fuse the passive features and exogenous features to obtain the i-th fusion result;

[0048] Determine whether the fusion result is the same as the i-1 fusion result;

[0049] If so, improve the confidence of the i-th fusion result;

[0050] If not, reduce the confidence of the i-th fusion result;

[0051] Determine whether the confidence level of the i-th fusion result meets the preset requirements or receives a stop fusion instruction;

[0052] If so, the i-th fusion result is output as passive and external source integrated fusion information;

[0053] If not, let i=i+1, and iterate the above steps until the confidence level of the i-th fusion result reaches the preset requirement or a stop fusion instruction is received.

[0054] Preferably, the passive features and the exogenous features are fused to obtain the i-th fusion result, which specifically includes:

[0055] The decision layer fusion technology is used to fuse the passive features and exogenous features to obtain the i-th fusion result.

[0056] In the present invention, the proposed digital array passive and external source integrated information fusion device and method receives the electromagnetic signal of the target radar radiation source within the preset frequency band reconnaissance range and the radio frequency signal of the external radiation source reflected by the target through the synthetic aperture antenna, then pre-processes the received radio frequency signal once through the radio frequency front end, and then pre-processes the once processed radio frequency signal twice through the frequency conversion receiving channel, and then digitizes the secondary pre-processed radio frequency signal through the digital acquisition module to obtain baseband I / Q data; then, the integrated processing module forms passive reconnaissance target parameter information and target track information of external source detection according to the baseband I / Q data, and finally, the passive reconnaissance target parameter information and the target track information of external source detection are fused and associated through the information fusion module to obtain passive and external source integrated fusion information, thereby realizing the positioning, tracking and listing processing of moving targets within the reconnaissance range under limited processing resources, effectively improving the integration and information richness. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is a block diagram of a digital array passive and external source integrated information fusion device according to one embodiment of the present invention.

[0058] Figure 2 This is a schematic diagram of signal processing by a digital acquisition module in an embodiment of the present invention.

[0059] Figure 3 FIG. 1 is a schematic diagram of signal processing of a comprehensive processing module in an embodiment of the present invention.

[0060] Figure 4 FIG. 1 is a schematic diagram of signal processing of an information fusion module in an embodiment of the present invention.

[0061] Figure 5 This is a block diagram of a digital acquisition module in one embodiment of the present invention. DETAILED DESCRIPTION

[0062] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0063] Reference Figure 1-4 The present invention proposes a digital array passive and external integrated information fusion device, comprising: a synthetic aperture antenna, a radio frequency front end, a frequency conversion receiving channel, a digital acquisition module, a comprehensive processing module, an information fusion module and a distributed power supply module;

[0064] A synthetic aperture antenna is used to receive electromagnetic signals from target radar radiation sources within a preset frequency band reconnaissance range and radio frequency signals from external radiation sources reflected by the target;

[0065] A radio frequency front end is configured to perform a first preprocessing on the received radio frequency signals.

[0066] A frequency conversion receiving channel is configured to perform a second preprocessing on the first-processed radio frequency signals.

[0067] A digital acquisition module is configured to perform a digitization processing on the second-processed radio frequency signals to obtain baseband I / Q data.

[0068] A comprehensive processing module is configured to form passive reconnaissance target parameter information and exogenous detection target track information according to the baseband I / Q data.

[0069] An information fusion module is configured to fuse and correlate the passive reconnaissance target parameter information and the exogenous detection target track information to obtain passive-exogenous integrated fusion information, so as to realize the positioning, tracking and plate processing of the targets in the reconnaissance range.

[0070] The present application can receive the target radar emitter electromagnetic signals and the radio frequency signals reflected by the target in the preset frequency band reconnaissance range through the synthetic aperture antenna, and then perform a first preprocessing on the received radio frequency signals through the radio frequency front end, perform a second preprocessing on the first-processed radio frequency signals through the frequency conversion receiving channel, perform a digitization processing on the second-processed radio frequency signals through the digital acquisition module to obtain baseband I / Q data, form passive reconnaissance target parameter information and exogenous detection target track information according to the baseband I / Q data through the comprehensive processing module, and finally fuse and correlate the passive reconnaissance target parameter information and the exogenous detection target track information through the information fusion module to obtain passive-exogenous integrated fusion information, so as to realize the positioning, tracking and plate processing of the moving targets in the reconnaissance range under the condition of limited processing resources, and effectively improve the integration and information richness.

[0071] The passive-exogenous integrated fusion information in the embodiment includes the position of the target and detailed emitter parameter information.

[0072] The target in the embodiment is a civilian ship, and the embodiment can realize the wide spatial domain search, tracking and plate processing of the target signals of multiple civilian ships in a complex electromagnetic environment.

[0073] Specifically, the synthetic aperture antenna can receive the target radar emitter electromagnetic signals and the radio frequency signals reflected by the target in the 2900MHz-3100MHz reconnaissance range.

[0074] In the embodiment, the first preprocessing includes amplitude limiting, filtering, amplification and input coupling correction.

[0075] When the switch of the RF front end selects the antenna unit, it is used to complete the signal reception. When the switch of the RF front end selects the correction signal, it is used to calibrate the amplitude and phase consistency of multiple receiving channels.

[0076] When a strong interference signal appears, the beam where the interference signal is located is turned off, and other beams can work normally. The strong interference signal has little impact on the instantaneous bandwidth of the channel, and the receiving channel has strong adaptability to complex electromagnetic environments.

[0077] In this embodiment, the secondary preprocessing includes two times of frequency conversion, filtering and amplification.

[0078] Specifically, the frequency conversion receiving channel in this embodiment uses two sets of independent local oscillators, and converts the broadband radio frequency signal into a fixed intermediate frequency signal through two frequency conversions.

[0079] In this embodiment, the digital processing includes digital acquisition, digital down-conversion and decimation filtering.

[0080] The digital receiving module in this embodiment includes an eight-channel ADC chip and an FPGA chip. Figure 5 As shown in the figure, the ADC chip performs digital sampling of RF signals, while the FPGA chip performs digital down-conversion and decimation filtering to generate baseband I / Q signals. The digital receiver module integrates 8 channels of high-speed data acquisition, completing acquisition, DDC preprocessing, and high-speed transmission of 8 RF signals.

[0081] In this embodiment, the integrated processing module is used to generate passive reconnaissance target parameter information and external detection target track information based on baseband I / Q data, specifically including:

[0082] The integrated processing module is used to perform beamforming processing on the baseband I / Q data to obtain the first beam data and the second beam data, and perform parameter measurement, signal sorting, batch compilation and batch processing on the first beam data to form the passive reconnaissance target parameter information, and perform echo detection and point track processing on the second beam data to form the target track information of the external source detection.

[0083] Specifically, the comprehensive processing module sends the passive target radiation source parameter results and the target track information detected by the external source to the information fusion module through the gigabit network cable.

[0084] In order to obtain the passive and exogenous integrated fusion information, in this embodiment, the information fusion module is used to fuse and associate the passive reconnaissance target parameter information and the target track information detected by the exogenous source to obtain the passive and exogenous integrated fusion information, specifically including:

[0085] The passive reconnaissance target parameter information and the external detection target track information are observed for the i-th time: i = 1, 2, ..., n, where n is a positive integer greater than 2;

[0086] respectively, the passive feature and the external source feature are fused to obtain the ith fusion result;

[0087] respectively, the passive feature and the external source feature are fused to obtain the ith fusion result;

[0088] whether the fusion result is the same as the (i-1)th fusion result is judged;

[0089] if yes, the confidence of the ith fusion result is increased;

[0090] if no, the confidence of the ith fusion result is decreased;

[0091] whether the confidence of the ith fusion result reaches a preset requirement or a stop fusion instruction is received is judged;

[0092] if yes, the ith fusion result is output as the passive-external source integrated fusion information;

[0093] if no, i is set as i+1, and the iteration cycle is performed until the confidence of the ith fusion result reaches the preset requirement or the stop fusion instruction is received.

[0094] In a further embodiment, the passive feature and the external source feature are fused to obtain the ith fusion result, and specifically comprising:

[0095] the passive feature and the external source feature are fused by using a decision layer fusion technology to obtain the ith fusion result.

[0096] In the embodiment, a distributed power supply module is further included, which is used for supplying power for the radio frequency front end, the frequency conversion receiving channel, the comprehensive processing module and the information fusion module, and is connected with the load through a power cable.

[0097] The application further provides a digital array passive-external source integrated information fusion method, comprising:

[0098] receiving target radar emitter electromagnetic signals in a preset frequency band detection range and target-reflected radio frequency signals of external emitters;

[0099] preprocessing the radio frequency signals;

[0100] secondary preprocessing the once-processed radio frequency signals;

[0101] digitizing the secondary-processed radio frequency signals to obtain baseband I / Q data;

[0102] forming passive detection target parameter information and external source detection target track information according to the baseband I / Q data;

[0103] The passive reconnaissance target parameter information and the target track information detected by the external source are fused and associated to obtain passive-external source integrated fusion information; wherein the passive-external source integrated fusion information comprises the position of the target and detailed radiation source parameter information.

[0104] In the embodiment, the passive reconnaissance target parameter information and the target track information detected by the external source are formed according to the baseband I / Q data, and specifically comprise:

[0105] The baseband I / Q data is subjected to beam forming processing to obtain first beam data and second beam data;

[0106] The first beam data is subjected to parameter measurement, signal sorting, batch processing to form the passive reconnaissance target parameter information;

[0107] The second beam data is subjected to echo detection and point track processing to form the target track information detected by the external source.

[0108] In the embodiment, the passive reconnaissance target parameter information and the target track information detected by the external source are fused and associated to obtain passive-external source integrated fusion information, and specifically comprise:

[0109] The passive reconnaissance target parameter information and the target track information detected by the external source are subjected to i-th observation: i = 1, 2, …, n, n being a positive integer greater than 2;

[0110] The passive reconnaissance target parameter information and the target track information detected by the external source subjected to the i-th observation are subjected to feature extraction to obtain passive features and external features;

[0111] The passive features and the external features are fused to obtain i-th fusion result;

[0112] It is judged whether the fusion result is identical to the (i-1)-th fusion result;

[0113] If yes, the confidence of the i-th fusion result is increased;

[0114] If no, the confidence of the i-th fusion result is decreased;

[0115] It is judged whether the confidence of the i-th fusion result reaches a preset requirement or a stop fusion instruction is received;

[0116] If yes, the i-th fusion result is output as the passive-external source integrated fusion information;

[0117] If no, i is set to i+1, and an iterative loop is performed until the confidence of the i-th fusion result reaches the preset requirement or the stop fusion instruction is received;

[0118] Preferably, the passive features and the external features are fused to obtain the i-th fusion result, and specifically comprise:

[0119] The decision layer fusion technology is used to fuse the passive features and exogenous features to obtain the i-th fusion result.

[0120] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A digital array passive and external integrated information fusion device, characterized in that: include: A synthetic aperture antenna is used to receive electromagnetic signals from target radar radiation sources within a preset frequency band reconnaissance range and radio frequency signals from external radiation sources reflected by the target; RF front end, used for pre-processing RF signals; Frequency conversion receiving channel, used for secondary pre-processing of the once processed RF signal; The digital acquisition module is used to digitize the secondary pre-processed RF signal to obtain baseband I / Q data; Comprehensive processing module, used to generate passive reconnaissance target parameter information and external detection target track information based on baseband I / Q data; The information fusion module is used to fuse and associate the passive reconnaissance target parameter information and the target track information of external detection to obtain passive and external integrated fusion information; wherein, the passive and external integrated fusion information includes the target's location and detailed radiation source parameter information.

2. The digital array passive and external integrated information fusion device according to claim 1, characterized in that: The information fusion module is used to fuse and correlate the passive reconnaissance target parameter information and the target track information detected by external sources to obtain the passive and external integrated fusion information. Specifically, it includes: The information fusion module is used to respectively observe the passive reconnaissance target parameter information and the target track information detected by the external source for the i-th time: i = 1, 2, ..., n, where n is a positive integer greater than 2; Feature extraction is performed on the passive reconnaissance target parameter information and the target track information detected by external sources observed for the i-th time to obtain passive features and external features; Fuse the passive features and exogenous features to obtain the i-th fusion result; Determine whether the i-th fusion result is the same as the i-1-th fusion result; If so, improve the confidence of the i-th fusion result; If not, reduce the confidence of the i-th fusion result; Determine whether the confidence level of the i-th fusion result meets the preset requirements or receives a stop fusion instruction; If so, the i-th fusion result is output as passive and external source integrated fusion information; If not, set i=i+1 and perform an iterative loop until the confidence level of the i-th fusion result reaches the preset requirement or a stop fusion instruction is received; The passive features and the exogenous features are fused to obtain the i-th fusion result, which specifically includes: The decision layer fusion technology is used to fuse the passive features and exogenous features to obtain the i-th fusion result.

3. The digital array passive and external integrated information fusion device according to claim 1, characterized in that: The integrated processing module is used to generate passive reconnaissance target parameter information and external detection target track information based on baseband I / Q data. Specifically, it includes: The integrated processing module is used to perform beamforming processing on the baseband I / Q data to obtain first beam data and second beam data; Perform parameter measurement, signal sorting, batch compilation and batch processing on the first beam data to form passive reconnaissance target parameter information; The second beam data is subjected to echo detection and point track processing to form target track information detected by external sources.

4. The digital array passive and external integrated information fusion device according to claim 1, characterized in that: It also includes a distributed power supply module, which is used to power the RF front end, frequency conversion receiving channel, integrated processing module and information fusion module.

5. The digital array passive and external integrated information fusion device according to claim 1 is characterized in that: Primary preprocessing includes limiting, filtering, amplification and correction of input coupling.

6. The digital array passive and external integrated information fusion device according to claim 1, characterized in that: Secondary preprocessing includes two frequency conversions, filtering and amplification.

7. The digital array passive and external integrated information fusion device according to claim 1, characterized in that: Digital processing includes digital acquisition, digital down-conversion and decimation filtering.

8. A digital array passive and external integrated information fusion method, characterized in that: include: Receive electromagnetic signals from target radar radiation sources within the preset frequency band reconnaissance range and radio frequency signals from external radiation sources reflected by the target; Performing a pre-processing on the radio frequency signal; Performing secondary preprocessing on the once processed radio frequency signal; Digitally process the secondary pre-processed RF signal to obtain baseband I / Q data; Generate passive reconnaissance target parameter information and external detection target track information based on baseband I / Q data; The passive reconnaissance target parameter information and the target track information of external detection are fused and associated to obtain the passive-external integrated fusion information; wherein, the passive-external integrated fusion information includes the target's position and detailed radiation source parameter information.

9. The digital array passive and external integrated information fusion method according to claim 8, characterized in that: The baseband I / Q data is used to generate passive reconnaissance target parameter information and external detection target track information, including: Performing beamforming processing on the baseband I / Q data to obtain first beam data and second beam data; Perform parameter measurement, signal sorting, batch compilation and processing on the first beam data to form passive reconnaissance target parameter information; The second beam data is subjected to echo detection and point track processing to form target track information detected by external sources.

10. The digital array passive and external integrated information fusion method according to claim 8, characterized in that: The passive reconnaissance target parameter information and the target track information detected by external sources are fused and correlated to obtain the passive and external source integrated fusion information, which specifically includes: The passive reconnaissance target parameter information and the external detection target track information are observed for the i-th time: i = 1, 2, ..., n, where n is a positive integer greater than 2; Feature extraction is performed on the passive reconnaissance target parameter information and the target track information detected by external sources observed for the i-th time to obtain passive features and external features; Fuse the passive features and exogenous features to obtain the i-th fusion result; Determine whether the fusion result is the same as the i-1 fusion result; If so, improve the confidence of the i-th fusion result; If not, reduce the confidence of the i-th fusion result; Determine whether the confidence level of the i-th fusion result meets the preset requirements or receives a stop fusion instruction; If so, the i-th fusion result is output as passive and external source integrated fusion information; If not, set i=i+1 and perform an iterative loop until the confidence level of the i-th fusion result reaches the preset requirement or a stop fusion instruction is received; The passive features and the exogenous features are fused to obtain the i-th fusion result, which specifically includes: The decision layer fusion technology is used to fuse the passive features and exogenous features to obtain the i-th fusion result.

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