A method for actively and passively associating information based on target motion direction and amplitude change rate

Abstract

The present invention discloses an active and passive information association method based on the target motion direction and amplitude change rate. For a perception system that uses radar equipment and electronic reconnaissance equipment for joint detection, the target motion direction is determined by radar track information, the received signal amplitude change rate is proposed by electronic reconnaissance data, the relationship between the target motion direction and the signal amplitude change rate is associated, and the association between radar detection data and electronic reconnaissance data is realized.

Description

Technical Field

[0001] The invention belongs to the joint detection technology of radar and electronic reconnaissance equipment, and specifically is an active and passive information association method based on target motion direction and amplitude change rate. Background Art

[0002] Radar and electronic reconnaissance equipment are widely used in the field of information perception, and each has its own characteristics. Radar is used to obtain target motion parameter information and Doppler information, and electronic reconnaissance equipment is used to obtain target electromagnetic spectrum information. The application of joint detection by radar and electronic reconnaissance can give full play to the respective advantages of the two types of sensors and enhance the ability to detect and track targets.

[0003] The azimuth accuracy of radar is generally 0.3° (root mean square), and the azimuth accuracy of electronic reconnaissance equipment is generally 4°-5° (root mean square). Therefore, when there are multiple radar detection target tracks within the beam range of the electronic reconnaissance equipment, it is difficult to match the radar tracks and the electromagnetic spectrum information detected by reconnaissance one by one, which brings inconvenience to the next step of target judgment and decision-making. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes an active and passive information association method based on target motion direction and amplitude change rate.

[0005] The technical solution to achieve the purpose of the present invention is: a method for associating active and passive information based on target motion direction and amplitude change rate, comprising:

[0006] Step 1: Receive radar message information and radiation source parameter message information in real time;

[0007] Step 2: Read the radar track data according to the set period and extract the target position parameter information;

[0008] Step 3: Extract the target's location parameters from the radiation source parameter data obtained by the electronic reconnaissance equipment, and divide the detection area into regions centered on the target's location parameters and setting the multiple electronic reconnaissance equipment accuracy as the boundary, marking it as region 1, and extract the radar track data falling within region 1;

[0009] Step 4: Extract the relative heading and relative speed information from the radar track data falling within area 1 one by one, and determine the radial speed of the target relative to the detection radar based on the relative heading and relative speed information;

[0010] Step 5: Extract the amplitude change rate from the radiation source parameter data;

[0011] Step 6: Correlate the radar track with the radiation source information according to the radial velocity of the target relative to the detection radar and the signal amplitude change rate. The azimuth and elevation parameter values ​​in the correlation data are based on the azimuth and elevation values ​​in the radar track parameters.

[0012] Step 7: Determine whether the radial velocity of the target relative to the detection radar and the rate of change of the signal amplitude meet the set conditions. If so, determine the correspondence between the radiation source parameters and the radar track to form the associated target parameters. Otherwise, cancel the association and return to step 2 to re-associate.

[0013] Step 8: Output the associated parameters.

[0014] Preferably, the radar message information includes: distance, azimuth, elevation angle, relative speed, and relative heading information.

[0015] Preferably, the radiation source parameter message information includes: azimuth, elevation angle, relative speed, relative heading, signal amplitude change rate, frequency, and bandwidth information.

[0016] Preferably, the target position parameter information extracted in step 2 includes distance, azimuth, and elevation.

[0017] Preferably, the period for reading radar track data in step 2 is set to 200 ms.

[0018] Preferably, in step 3, the boundary is 3 times the accuracy of the electronic reconnaissance equipment.

[0019] Preferably, the specific formula for determining the radial velocity of the target relative to the detection radar according to the relative heading and relative speed information is:

[0020]

[0021] In the formula, is the radial velocity of the target relative to the detection radar, is the relative speed, is the relative heading.

[0022] Preferably, the specific rule for associating the radar track with the radiation source information according to the radial velocity of the target relative to the detection radar and the signal amplitude change rate is:

[0023] Will The corresponding track and Corresponding radiation source information is associated;

[0024] Will The corresponding track and Corresponding radiation source information is associated;

[0025] Will The corresponding track and The corresponding radiation source information is associated, where is the radial velocity of the target relative to the detection radar, is the radial velocity threshold, is the amplitude change rate threshold, is the rate of change of amplitude.

[0026] Preferably, the determination method of step 7 is specifically as follows:

[0027] Determine whether the radial velocity of the target relative to the detection radar and the sign of the signal amplitude change rate have not changed within the set period. If not, determine the corresponding relationship between the radiation source parameters and the radar track to form the associated target parameters. Otherwise, cancel the association and return to step 2 to re-associate.

[0028] Compared with the prior art, the present invention has the following significant advantages: in the case of joint detection by radar and electronic reconnaissance, when there are multiple radar detection target tracks within the beam range contained in the electronic reconnaissance equipment, there is an ambiguous problem in the matching correlation between the radar track and the electromagnetic spectrum information detected by the reconnaissance, and an algorithm is proposed for correlating the target motion information extracted from the track information and the signal amplitude change rate information in the information detected by the reconnaissance equipment. The algorithm extracts the relationship between the target motion direction in the radar track and the signal amplitude change rate in the electronic reconnaissance equipment, determines the correlation between the two, confirms the parameters belonging to the same target, and then correlates the detection perception information of the two sensors on the same equipment, eliminates data ambiguity, and improves decision efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The flowchart is a method for associating active and passive information based on the target motion direction and amplitude change rate.

[0030] Figure 2 It is the radar target track distribution map.

[0031] Figure 3 Schematic diagram of radar detection targets within the radiation range of the electronic reconnaissance beam.

[0032] Figure 4 Schematic diagram of matching targets that form an association relationship. DETAILED DESCRIPTION

[0033] The present invention will be further explained below in conjunction with the accompanying drawings.

[0034] A method for associating active and passive information based on the target motion direction and amplitude change rate. In the detection area shared by radar and electronic reconnaissance, the target motion direction is extracted from the track information formed by radar detection, and the target motion direction is decomposed into radial and tangential directions relative to the reconnaissance equipment; from the information detected by the electronic reconnaissance equipment, the received signal amplitude is extracted and the signal amplitude change rate is analyzed; the relationship between the target motion direction in the radar track and the signal amplitude change rate in the electronic reconnaissance equipment is associated, and those with the same amplitude change rate are confirmed to be the same target. The information belonging to the same target is associated to determine the target parameters, laying the foundation for taking measures against the UAV in the next step. Figure 1 As shown, the specific steps of the method are:

[0035] S1: receiving radar message information and radiation source parameter message information in real time, wherein the radar message information includes at least: distance, azimuth, elevation angle, relative speed, and relative heading parameters; and the radiation source parameter message information includes at least: azimuth, elevation angle, relative speed, relative heading, signal amplitude change rate, frequency, and bandwidth parameters.

[0036] S2: Read radar track data according to the set period and extract target position parameters: distance, azimuth, and elevation.

[0037] In some embodiments, the set period is 200 ms.

[0038] S3: Extract the target's position parameters from the radiation source parameter data obtained by the electronic reconnaissance equipment, including azimuth and elevation parameters. Draw the detection areas centered on the radiation source's azimuth and elevation parameters and bounded by three times the accuracy of the electronic reconnaissance equipment, marked as Area 1, and extract the radar track data falling within Area 1.

[0039] S4: extracting relative heading and relative speed information from the radar track data falling in area 1 one by one, and determining the radial speed of the target within area 1 relative to the detection radar according to the relative heading and relative speed information.

[0040] Specifically, in the radar track data of area 1, the relative heading and relative information are extracted from the radar track data one by one, and the radial speed of the target relative to the detection radar is extracted based on the relative heading and relative speed information. , n is the value that falls on The number of tracks in the area, the relative speed is recorded as , the relative heading is recorded as .

[0041] The radial velocity of the target relative to the detection radar is:

[0042]

[0043] In specific applications, the displacement or flight status of the target can be determined based on the radial velocity, for example:

[0044] when When , it is determined that the target has no displacement in the radial direction;

[0045] when When , it is determined that the target has displacement in the radial direction;

[0046] when When , it is judged that the target is flying towards the station;

[0047] when , it is judged that the target is flying away from the station.

[0048] in, ;

[0049] S5: The radiation source parameter data in the area, and the signal amplitude change rate is extracted from the radiation source parameter data , m is the value falling on The number of radiation source parameters in the area;

[0050] S6: Correlate the radar track with the emitter information based on the radial velocity of the target relative to the detection radar and the rate of change of the signal amplitude:

[0051] Will The corresponding track and Corresponding radiation source information is associated;

[0052] Will The corresponding track and Corresponding radiation source information is associated;

[0053] Will The corresponding track and Corresponding radiation source information is associated;

[0054] in, ;

[0055] S7: Determine according to the antenna period, , If the signs of the two associated parameters remain unchanged for three consecutive cycles, the corresponding relationship between the radiation source parameters and the radar track is determined to form the associated target parameters, including: distance, azimuth, elevation angle, relative speed, relative heading, and frequency. Otherwise, the association is cancelled and re-associated.

[0056] S8: Output associated parameters.

[0057] In the process of continuously receiving radar message information and radiation source parameter message information, steps S2 to S8 are executed in a set periodic sequence.

[0058] Example

[0059] In this embodiment, the collected radar target tracks are shown in Table 1, and the corresponding distribution diagram is shown in Table 1. Figure 2 shown.

[0060] Table 1

[0061] Serial number Distance (km) Azimuth (°) Elevation angle (°) Speed ​​(m / s) Heading (°) 1 5.5 32.5 10.3 10 210 2 6.0 28.2 13 15 28 3 4.3 38.7 8.7 0.15 200 4 7.9 16.3 16 56 180 5 3.2 48 30 42 16 6 8.7 82 40 96 156

[0062] The data collected for electronic reconnaissance is shown in Table 2:

[0063] Table 2

[0064] Serial number Azimuth (°) Elevation angle (°) Amplitude change rate (mv / s) Frequency (GHz) Bandwidth (MHz) 1 32.5 10.3 1.2 2.458 9.45

[0065] The accuracy of electronic reconnaissance is 3° in azimuth and 3° in elevation. Now we need radar detection data and electronic detection reconnaissance data.

[0066] Area 1 is the area enclosed by the azimuth range (23.5, 41.5) and the elevation range (1.3, 19.3);

[0067] The radar target tracks falling within area 1 are shown in Table 3. The specific schematic diagram is shown in Figure 3 , where the red circles are the target track azimuth distance distribution points, and the large blue circles represent the matching areas.

[0068] Table 3

[0069] Serial number Distance (km) Azimuth (°) Elevation angle (°) Speed ​​(m / s) Heading (°) 1 5.5 32.5 10.3 10 210 2 6.0 28.2 13 15 28 3 4.3 38.7 8.7 0.15 200

[0070] Radial velocity calculation:

[0071] according to

[0072] The radial velocity of the target falling within the range of region 1 is calculated as shown in Table 4.

[0073] Table 4

[0074] Serial number Distance (km) Azimuth (°) Elevation angle (°) Speed ​​(m / s) Heading (°) Radial velocity 1 5.5 32.5 10.3 10 210 -8.6 2 6.0 28.2 13 15 28 13.2 3 4.3 38.7 8.7 0.15 200 -0.14

[0075] Will The corresponding track and Corresponding radiation source information is associated;

[0076] The target amplitude change rate obtained by electronic reconnaissance is 1.2mv / s. According to the matching method in step 6, the second track can be matched with this data. The results after association are shown in Table 5.

[0077] Table 5

[0078] Serial number Distance (km) Azimuth (°) Elevation angle (°) Speed ​​(m / s) Heading (°) Amplitude change rate (mV / s) Frequency (GHz) Bandwidth (MHz) 2 6.0 28.2 13 15 28 1.2 2.458 9.45

[0079] The target result after association is as follows Figure 4 As shown, the red circles are the target track azimuth distance distribution points, the large blue circles represent the matching areas, and the red circles marked with blue asterisks are the target tracks matched by radar reconnaissance.

Claims

1. A method for associating active and passive information based on target motion direction and amplitude change rate, characterized in that: include: Step 1: Receive radar message information and radiation source parameter message information in real time; Step 2: Read radar track data from radar message information according to the set period and extract target position parameter information; Step 3: Extract the target's location parameters from the radiation source parameter message information obtained by the electronic reconnaissance equipment, and divide the detection area into areas centered on the target's location parameters and setting the multiple electronic reconnaissance equipment accuracy as the boundary, marking it as area 1, and extract the radar track data falling within area 1; Step 4: Extract the relative heading and relative speed information from the radar track data falling within area 1 one by one, and determine the radial speed of the target relative to the detection radar based on the relative heading and relative speed information; Step 5: Extract the signal amplitude change rate from the radiation source parameter data; Step 6: Correlate the radar track with the radiation source information according to the radial velocity of the target relative to the detection radar and the signal amplitude change rate. The azimuth and elevation parameter values ​​in the correlation data are based on the azimuth and elevation values ​​in the radar track parameters. Step 7: Determine whether the radial velocity of the target relative to the detection radar and the signal amplitude change rate meet the set conditions. If so, determine the corresponding relationship between the radiation source parameters and the radar track to form the associated target parameters. Otherwise, cancel the association and return to step 2 to re-associate. Step 8: Output the associated data.

2. The active and passive information association method based on target motion direction and amplitude change rate according to claim 1 is characterized in that: The radar message information includes: distance, azimuth, elevation angle, relative speed, and relative heading information.

3. The active and passive information association method based on target motion direction and amplitude change rate according to claim 1 is characterized in that: The radiation source parameter message information includes: azimuth, elevation angle, signal amplitude change rate, frequency, and bandwidth information.

4. The active and passive information association method based on target motion direction and amplitude change rate according to claim 1 is characterized in that: The target position parameter information extracted in step 2 includes distance, azimuth, and elevation.

5. The active and passive information association method based on target motion direction and amplitude change rate according to claim 1, characterized in that: The period for reading radar track data in step 2 is set to 200ms.

6. The active and passive information association method based on target motion direction and amplitude change rate according to claim 1, characterized in that: In step 3, the boundary is 3 times the accuracy of the electronic reconnaissance equipment.

7. The active and passive information association method based on target motion direction and amplitude change rate according to claim 1, characterized in that: The specific formula for determining the radial velocity of the target relative to the detection radar based on the relative heading and relative speed information is: ， In the formula, is the radial velocity of the target relative to the detection radar, is the relative speed, is the relative heading.

8. The active and passive information association method based on target motion direction and amplitude change rate according to claim 1 is characterized in that: The specific rules for associating radar tracks with radiation source information based on the radial velocity of the target relative to the detection radar and the rate of change of signal amplitude are as follows: Will The corresponding track and Corresponding radiation source information is associated; Will The corresponding track and Corresponding radiation source information is associated; Will The corresponding track and The corresponding radiation source information is associated, where is the radial velocity of the target relative to the detection radar, is the radial velocity threshold, is the amplitude change rate threshold, is the rate of change of signal amplitude.

9. The active and passive information association method based on target motion direction and amplitude change rate according to claim 1, characterized in that: The specific judgment method of step 7 is: Determine whether the radial velocity of the target relative to the detection radar and the sign of the signal amplitude change rate have not changed within the set period. If not, determine the corresponding relationship between the radiation source parameters and the radar track to form the associated target parameters. Otherwise, cancel the association and return to step 2 to re-associate.

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