A radar extended target parameter adjustable detector for signal mismatch

A detector and parameter technology, applied in the field of multi-channel active phased array radar, to achieve the effect of good detection performance

Active Publication Date: 2022-07-08
AIR FORCE EARLY WARNING ACADEMY
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of detecting extended targets when there is signal mismatch in multi-channel active phased array radar

Method used

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  • A radar extended target parameter adjustable detector for signal mismatch
  • A radar extended target parameter adjustable detector for signal mismatch
  • A radar extended target parameter adjustable detector for signal mismatch

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Embodiment Construction

[0016] The principle of implementing the present invention is as follows: using training samples to form a sampling covariance matrix, the sampling covariance matrix quasi-whitening the signal steering vector and the data to be detected to eliminate clutter, select reasonable adjustable parameters, and form the detection statistics of the detector. , the detection threshold is determined according to the preset false alarm probability value, and the detection statistics of the detector are compared with the detection threshold. If it is higher than the threshold, it is determined that the target exists;

[0017] The detailed steps of the present invention are as follows:

[0018] (1) For the extended target whose range extension dimension is K, its radar echo signal is represented by an N×K-dimensional matrix as

[0019] X=[x 1 , x 2 ,...,x K ] (1)

[0020] where, N×1 dimensional column vector Represents the echo data of the k-th distance cell occupied by the extended ta...

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Abstract

The invention discloses a radar extended target parameter adjustable detector for signal mismatch. The method is based on the idea of ​​multi-channel adaptive detection, introduces adjustable parameters, and realizes flexible detection of mismatched signals by adjusting the adjustable parameters. Based on the multi-channel phased array radar system, the present invention uses multiple airspace channels for data reception, determines the data to be detected and training sample data, and uses the training sample data to form a sampling covariance matrix; and then determines adjustable parameters according to system requirements The detection threshold is determined according to the false alarm probability required by the system; finally, the detection statistic is calculated and compared with the threshold. If it is higher than the threshold, it is judged that the target exists; . Compared with traditional detection methods, this method can achieve robust detection or suppression of mismatched signals by adjusting adjustable parameters, and has flexible adjustment characteristics; at the same time, the detector itself has CFAR characteristics, so no additional CFAR processing is required.

Description

technical field [0001] The invention relates to a radar expansion target parameter adjustable detector for signal mismatch, which is especially suitable for multi-channel active phased array radar. Background technique [0002] Since the birth of radar, its functions have been continuously expanded and improved, but target detection has always been one of the most important functions. Due to the limitation of component manufacturing technology, early radars often only have a single channel, and the obtained target information is limited, which restricts the radar's combat effectiveness. Phased array radar can transmit and receive data independently through multiple array elements, which can obtain more information. In addition, the multi-channel model can describe the correlation characteristics of signals between different channels, which provides the possibility to improve the performance of radar systems through signal processing. [0003] Both traditional and active ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/04G01S7/41
CPCG01S7/414G01S7/418G01S13/02G01S13/04G01S2013/0254Y02A90/10
Inventor 刘维建王永良段克清张西川陈威
Owner AIR FORCE EARLY WARNING ACADEMY
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