Adaptive tracking method for overhead target of phased array radar

An adaptive tracking and phased array radar technology, applied in the radar field, can solve problems such as tracking blind spots and target loss

Pending Publication Date: 2022-01-11
中国船舶集团有限公司第七二四研究所
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Problems solved by technology

[0005] Aiming at the problem that when the phased array radar tracks the target, when the target elevation angle is too high and exceeds the scan range of the array beam, the target will be lost and the tracking blind area will appear.

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  • Adaptive tracking method for overhead target of phased array radar
  • Adaptive tracking method for overhead target of phased array radar
  • Adaptive tracking method for overhead target of phased array radar

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Embodiment Construction

[0014] The present invention will be further explained below in conjunction with the accompanying drawings.

[0015] A phased array radar overhead target adaptive tracking method proposed by the present invention estimates the radial velocity of the target when the phased array radar tracks the target through sum and difference beam angle measurement, and assists the tracking through trajectory prediction. The surface inclination and the scanning range of the front beam determine an elevation angle threshold. When the estimated value of the target elevation angle is lower than the threshold, continue to use the sum-difference beam angle measurement method to track; when the target elevation angle estimate is greater than the threshold value, due to the distortion of the pattern, the error of the sum-difference beam angle measurement at this time is large and cannot be effective To estimate the target position, the overhead target tracking method proposed by the present inventi...

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Abstract

The invention relates to an adaptive tracking method for an overhead target of phased array radar. The method comprises the following steps of: acquiring a target elevation angle threshold value according to an array plane inclination angle and a beam scanning range, and conducting tracking by adopting a sum-difference beam angle measurement mode when the target elevation angle value is smaller than the elevation angle threshold value, or conducting tracking by adopting a target overhead tracking mode when the target elevation angle value is greater than the elevation angle threshold value, wherein during overhead tracking, transmitting and receiving both adopt a multi-beam form; compensating doppler frequency shift caused by radar platform motion, acquiring a target radial speed threshold value through Doppler frequency with maximum clutter, and carrying out clutter removal and target echo detection through inter-pulse-group frequency agility, in-pulse-group adaptive MTI and inter-pulse-group accumulation when the target radial speed is larger than the radial speed threshold value, or carrying out clutter removal and target echo detection through inter-pulse frequency agility and inter-pulse accumulation when a radial speed is smaller than the radial speed threshold value; and finally, with target multi-beam echo amplitude as a weighted value, acquiring an estimated value of a target position through multi-beam position condensation so as to realize tracking of the overhead target.

Description

technical field [0001] The invention belongs to the technical field of radar. Background technique [0002] Phased array radar can realize fast scanning of the beam without mechanical rotation, so as to realize high data rate tracking of the target. High elevation angles lead to loss of targets, resulting in overhead blind spots. [0003] For the phased array radar overhead target tracking problem, Southwest Institute of Electronics Technology (the Tenth Research Institute of China Electronics Technology Group Corporation) "Multi-beam Spherical Phased Array Antenna Tracking Target Overhead Method" (CN108051803A) discloses a The digital multi-beam spherical phased array antenna is used to track the target over the top. This method uses the spherical phased array antenna to reduce the dynamic change of the azimuth and pitch angle through the conversion of the coordinate system when the target is over the top, so as to ensure the accuracy of the target. stable tracking. Alth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/66
CPCG01S13/66
Inventor 吴贞宇毕井章熊风周浩秦赟夏厚培
Owner 中国船舶集团有限公司第七二四研究所
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