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Pitching angle measurement method of two-coordinate radar

A technology of pitch angle and radar, which is applied in the field of radar signal detection and data processing, can solve problems such as the method of measuring height without a single radar, and achieve the effects of difficult detection, high-precision and stable tracking, and improved detection probability

Active Publication Date: 2020-12-08
CNGC INST NO 206 OF CHINA ARMS IND GRP
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AI Technical Summary

Problems solved by technology

[0006] The above three methods all require two radars, and there is no method for measuring height with a single radar in the prior art

Method used

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  • Pitching angle measurement method of two-coordinate radar
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  • Pitching angle measurement method of two-coordinate radar

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Embodiment Construction

[0039] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0040] The present invention adopts the combination method of pitch multi-beam ratio amplitude angle measurement + target tracking precise angle measurement

[0041] a. Pitch angle measurement

[0042] The pitch of the radar search adopts multi-beam scanning (generally three beams are used), covering the flying airspace of the UAV, and the three beams are arranged at equal intervals.

[0043] When only one beam detects the target, it is impossible to measure the angle by comparison, and the elevation angle of the beam can only be used as the elevation angle of the target, and the accuracy is poor;

[0044] When the target is detected by two beams, the center of mass method is used for amplitude weighting to obtain a rough target pitch angle. Assume that the elevation angles corresponding to the two beams are E 1 ,E 2 , the echo amplitudes are F 1 , F 2 , th...

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Abstract

The invention relates to a pitching angle measurement method of a two-coordinate radar, and belongs to the technical field of radar signal detection and data processing. The method comprises the following steps: performing grid division on a pitching plane by adopting pitching multi-beam scanning, then solving a cell amplitude average value, setting a threshold according to the cell amplitude average value to judge a target, and performing condensation processing on primary trace point information of the target; and predicting and filtering the condensed trace, and outputting a flight path, wherein the flight path information comprises pitch, distance and azimuth information. According to the method, the defect that in the prior art, a single-part two-coordinate radar cannot achieve heightmeasurement is overcome, clutter suppression is conducted at the same time, and the tracking precision is improved.

Description

technical field [0001] The invention relates to radar data processing and signal processing methods, and belongs to the technical field of radar signal detection and data processing. Background technique [0002] Due to the limitation of the system, the two-coordinate radar can only detect the distance and azimuth information of the target, and cannot obtain accurate pitch information, that is, it cannot measure the height. The flying height of the UAV varies from tens of meters to hundreds of meters, and its maneuverability is strong. As an anti-UAV detection radar, it cannot obtain the specific three-dimensional position of the UAV if it cannot measure the height, which is a lack of function. [0003] The main detection target of the anti-drone detection radar is a "low, slow and small" target such as a UAV. Its main characteristics are: 1) low: the target flying altitude is low, and it is easily interfered by ground targets; 2) slow: the target flies The speed is slow, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/72G01S13/58G01S7/41
CPCG01S13/58G01S13/72G01S7/418Y02A90/10
Inventor 段芳芳张明董锦李涛牟聪
Owner CNGC INST NO 206 OF CHINA ARMS IND GRP
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