Digital array passive and exogenous integrated information fusion device and method

Abstract

The invention discloses a digital array passive and exogenous integrated information fusion device and method, and the device comprises a synthetic aperture antenna which is used for receiving a target radar radiation source electromagnetic signal in a preset frequency band reconnaissance range and a radio frequency signal, reflected by a target, of an external radiation source; the radio frequency front end is used for carrying out primary preprocessing on the radio frequency signal; the frequency conversion receiving channel is used for carrying out secondary preprocessing on the radio frequency signal subjected to primary processing; the digital acquisition module is used for carrying out digital processing on the radio frequency signal subjected to secondary preprocessing to obtain baseband I / Q data; the comprehensive processing module is used for forming passive reconnaissance target parameter information and external source detection target track information according to the baseband I / Q data; and the information fusion module is used for carrying out fusion association on the passive reconnaissance target parameter information and the target track information detected by the external source to obtain passive and external source integrated fusion information. According to the invention, positioning, tracking and listing processing of a moving target in a reconnaissance range are realized.

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 the fields of communications, radar, electronic reconnaissance, remote control and telemetry, the radio system converts electromagnetic waves into electrical signals through the receiving antenna, and then feeds them into the receiver for frequency conversion acquisition and detection analysis, and finally sends the detection and analysis results to the data processing module for data processing. Among them, the receiving system is the core component of the radio system. With the development of technology, the types, strengths and bandwidths of radio signals are constantly increasing, requiring receivers and data processors to have the ability of broadband reception, high probability interception, simultaneous multi-source signal processing and multi-source information fusion in complex electromagnetic environments. This demand is particularly evident in the fields of external radiation source detection and electronic reconnaissance.

[0003] In order to solve this problem, broadband array multi-beam technology has been developed. Among them, broadband array multi-beam technology can be divided 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 key technology research stage, and has disadvantages such as large link loss, large noise coefficient, small dynamic range, dependence on imported components, and poor stability. When the number of beams of analog array multi-beam technology is large, the system equipment volume is large and the cost performance is low. Digital array multi-beam technology has the characteristics of flexible beam forming, wide spatial coverage and high gain, comprehensive space, frequency and time three-dimensional processing, strong adaptability to complex electromagnetic environment, secondary development and strong function expansion capabilities.

[0004] However, when using digital array multi-beam technology to design reconnaissance systems, under the condition of limited processing resources, how to integrate 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, which requires finding a new method to realize passive exogenous integration 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 source 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] A frequency conversion receiving channel is used to perform secondary preprocessing on the RF signal processed once;

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

[0011] A comprehensive processing module, used to form 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 source detection to obtain passive and external source integrated fusion information; wherein, the passive and external source 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, which specifically includes:

[0014] The information fusion module is used to 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] The passive reconnaissance target parameter information and the target track information detected by the external source observed for the i-th time are respectively extracted to obtain the passive features and the external features;

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

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

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

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

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

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

[0022] If not, set i=i+1 and perform an iterative loop until the confidence 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 the 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 according to 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 parameter information of passive reconnaissance targets;

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

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

[0030] Preferably, the primary preprocessing 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 source 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 and external integrated fusion information; wherein, the passive and external integrated fusion information includes the location of the target and detailed radiation source parameter information.

[0040] Preferably, 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, specifically including:

[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 batch processing on the first beam data to form parameter information of passive reconnaissance targets;

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

[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 target track information detected by external sources are observed for the i-th time respectively: i = 1, 2, ..., n, where n is a positive integer greater than 2;

[0046] The passive reconnaissance target parameter information and the target track information detected by the external source observed for the i-th time are respectively extracted to obtain the passive features and the external features;

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

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

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

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

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

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

[0053] If not, let i=i+1, and iterate the above steps until the confidence 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 the 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 reflected by the external radiation source through the target through the comprehensive 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 digitally processes the secondary pre-processed radio frequency signal through the digital acquisition module to obtain baseband I / Q data; then, the passive reconnaissance target parameter information and the target track information of the external source detection are formed according to the baseband I / Q data through the comprehensive processing module, and finally, the passive reconnaissance target parameter information and the target track information of the external source detection are fused and associated through the information fusion module to obtain the passive external source integrated fusion information, thereby realizing the positioning, tracking and listing processing of the moving target within the reconnaissance range under the condition of limited processing resources, and effectively improving the integration and information richness. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0059] Figure 3 It is a signal processing schematic diagram of the integrated processing module in one embodiment of the present invention.

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

[0061] Figure 5 It 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 of the present invention and the features in the embodiments 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 external source 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] The radio frequency front end is used to pre-process the received radio frequency signal;

[0066] A frequency conversion receiving channel is used to perform secondary preprocessing on the RF signal processed once;

[0067] A digital acquisition module is used to digitize the secondary pre-processed RF signal to obtain baseband I / Q data;

[0068] A comprehensive processing module, used to form passive reconnaissance target parameter information and external detection target track information based on baseband I / Q data;

[0069] The information fusion module is used to fuse and associate the passive reconnaissance target parameter information with the target track information detected by external sources to obtain passive and external integrated fusion information, thereby realizing the positioning, tracking and listing processing of targets within the reconnaissance range.

[0070] The present invention receives electromagnetic signals of target radar radiation sources within a preset frequency band reconnaissance range and radio frequency signals reflected by external radiation sources through targets through a synthetic aperture antenna, then pre-processes the received radio frequency signals once through a radio frequency front end, then pre-processes the once processed radio frequency signals twice through a frequency conversion receiving channel, and then digitally processes the secondary pre-processed radio frequency signals through a digital acquisition module to obtain baseband I / Q data; then, passive reconnaissance target parameter information and target track information detected by external sources are formed according to the baseband I / Q data through a synthetic processing module, and finally, the passive reconnaissance target parameter information and the target track information detected by external sources are fused and associated through an information fusion module to obtain passive and external integrated fusion information, thereby realizing positioning, tracking and listing processing of moving targets within the reconnaissance range under the condition of limited processing resources, and effectively improving the integration level and the richness of information.

[0071] The passive and external source integrated fusion information in this embodiment includes the location of the target and detailed radiation source parameter information.

[0072] The target in this embodiment is a civilian ship. This embodiment can realize wide airspace search, tracking and listing processing of multiple civilian ship target signals in a complex electromagnetic environment.

[0073] Specifically, the synthetic aperture antenna is capable of receiving electromagnetic signals from target radar radiation sources within the reconnaissance range of 2900MHz to 3100MHz and radio frequency signals from external radiation sources reflected by the target.

[0074] In this embodiment, the primary preprocessing includes limiting, filtering, amplifying and correcting input coupling.

[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 for amplitude and phase consistency calibration 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 frequency conversions, 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 after 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 is used to complete the digital sampling of the RF signal, and the FPGA chip is used to complete the digital down-conversion and extraction filtering to generate the baseband I / Q signal. The digital receiving module integrates 8-channel high-speed data acquisition to complete the acquisition, DDC pre-processing and high-speed transmission of 8-channel RF signals.

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

[0082] The comprehensive 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 passive reconnaissance target parameter information, and perform echo detection and point track processing on the second beam data to form target track information for 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 target track information detected by external sources are observed for the i-th time respectively: i = 1, 2, ..., n, where n is a positive integer greater than 2;

[0086] The passive reconnaissance target parameter information and the target track information detected by the external source observed for the i-th time are respectively extracted to obtain the passive features and the external features;

[0087] Fuse the passive features and the exogenous features to obtain the i-th fusion result;

[0088] Determine whether the fusion result is the same as the i-1th fusion result;

[0089] If so, the confidence of the i-th fusion result is improved;

[0090] If not, the confidence of the i-th fusion result is reduced;

[0091] Determine whether the confidence of the i-th fusion result meets the preset requirement or receives a stop fusion instruction;

[0092] If yes, the i-th fusion result is output as passive and external integrated fusion information;

[0093] If not, set i=i+1 and perform an iterative loop until the confidence of the i-th fusion result reaches the preset requirement or a stop fusion instruction is received.

[0094] In a further embodiment, the passive features and the exogenous features are fused to obtain the i-th fusion result, which specifically includes:

[0095] The decision layer fusion technology is used to fuse the passive features and the exogenous features to obtain the i-th fusion result.

[0096] In this embodiment, a distributed power supply module is also included. The distributed power supply module is used to supply power to the RF front end, the frequency conversion receiving channel, the integrated processing module and the information fusion module, and is connected to the load via a power cable.

[0097] The present invention also proposes a digital array passive and external source integrated information fusion method, comprising:

[0098] 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;

[0099] Preprocess the radio frequency signal once;

[0100] Performing secondary preprocessing on the once processed radio frequency signal;

[0101] Digitally process the secondary pre-processed RF signal to obtain baseband I / Q data;

[0102] Generate passive reconnaissance target parameter information and external detection target track information based on baseband I / Q data;

[0103] The passive reconnaissance target parameter information and the target track information of external detection are fused and associated to obtain the passive and external integrated fusion information; wherein, the passive and external integrated fusion information includes the location of the target and detailed radiation source parameter information.

[0104] In this 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, specifically including:

[0105] Performing beamforming processing on the baseband I / Q data to obtain first beam data and second beam data;

[0106] Perform parameter measurement, signal sorting, batch compilation and batch processing on the first beam data to form parameter information of passive reconnaissance targets;

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

[0108] In this embodiment, 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:

[0109] The passive reconnaissance target parameter information and the target track information detected by external sources are observed for the i-th time respectively: i = 1, 2, ..., n, where n is a positive integer greater than 2;

[0110] The passive reconnaissance target parameter information and the target track information detected by the external source observed for the i-th time are respectively extracted to obtain the passive features and the external features;

[0111] Fuse the passive features and the exogenous features to obtain the i-th fusion result;

[0112] Determine whether the fusion result is the same as the i-1th fusion result;

[0113] If so, the confidence of the i-th fusion result is improved;

[0114] If not, the confidence of the i-th fusion result is reduced;

[0115] Determine whether the confidence of the i-th fusion result meets the preset requirement or receives a stop fusion instruction;

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

[0117] If not, set i=i+1 and perform an iterative loop until the confidence of the i-th fusion result reaches the preset requirement or a stop fusion instruction is received;

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

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

[0120] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A digital array passive and external source 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; A frequency conversion receiving channel is used to perform secondary preprocessing on the RF signal processed once; A digital acquisition module is used to digitize the secondary pre-processed RF signal to obtain baseband I / Q data; A comprehensive processing module, used to form 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 source detection to obtain passive and external source integrated fusion information; wherein, the passive and external source integrated fusion information includes the target's location and detailed radiation source parameter information.

2. The digital array passive and external source integrated information fusion device according to claim 1 is characterized in that: The information fusion module is used to fuse and associate the passive reconnaissance target parameter information with the target track information detected by external sources to obtain the passive and external integrated fusion information, which specifically includes: The information fusion module is used to 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; The passive reconnaissance target parameter information and the target track information detected by the external source observed for the i-th time are respectively extracted to obtain the passive features and the external features; Fuse the passive features and the 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, the confidence of the i-th fusion result is improved; If not, the confidence of the i-th fusion result is reduced; Determine whether the confidence of the i-th fusion result meets the preset requirement or receives a stop fusion instruction; If yes, the i-th fusion result is output as passive and external integrated fusion information; If not, set i=i+1 and perform an iterative loop until the confidence of the i-th fusion result reaches the preset requirement or a stop fusion instruction is received; Preferably, 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 the exogenous features to obtain the i-th fusion result.

3. The digital array passive and external source integrated information fusion device according to claim 1 is 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, including: 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 parameter information of passive reconnaissance targets; The second beam data is subjected to echo detection and point track processing to form target track information of external source detection.

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

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

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

8. A digital array passive and external source 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 and external integrated fusion information; wherein, the passive and external integrated fusion information includes the location of the target and detailed radiation source parameter information.

9. The digital array passive and external source integrated information fusion method according to claim 8, characterized in that: The passive reconnaissance target parameter information and the target track information of the external detection are formed according to the baseband I / Q data, 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 batch processing on the first beam data to form parameter information of passive reconnaissance targets; The second beam data is subjected to echo detection and point track processing to form target track information of external source detection.

10. The digital array passive and external source integrated information fusion method according to claim 1, characterized in that: The passive reconnaissance target parameter information and the target track information detected by external sources are fused and associated to obtain the passive and external source integrated fusion information, which specifically includes: The passive reconnaissance target parameter information and the target track information detected by external sources are observed for the i-th time respectively: i = 1, 2, ..., n, where n is a positive integer greater than 2; The passive reconnaissance target parameter information and the target track information detected by the external source observed for the i-th time are respectively extracted to obtain the passive features and the external features; Fuse the passive features and the exogenous features to obtain the i-th fusion result; Determine whether the fusion result is the same as the i-1th fusion result; If so, the confidence of the i-th fusion result is improved; If not, the confidence of the i-th fusion result is reduced; Determine whether the confidence of the i-th fusion result meets the preset requirement or receives a stop fusion instruction; If yes, the i-th fusion result is output as passive and external integrated fusion information; If not, set i=i+1 and perform an iterative loop until the confidence of the i-th fusion result reaches the preset requirement or a stop fusion instruction is received; Preferably, 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 the exogenous features to obtain the i-th fusion result.

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