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Multi-target constant false alarm rate detection method based on signal agent

A constant false alarm rate and detection method technology, which is applied in alarms, radio wave measurement systems, instruments, etc., to achieve the effect of overcoming the shadowing effect

Pending Publication Date: 2021-04-20
ZHEJIANG UNIV
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Problems solved by technology

However, the target detection still depends on the detection threshold determined by the background level estimation in advance, and cannot directly avoid the influence of interfering targets.

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  • Multi-target constant false alarm rate detection method based on signal agent
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  • Multi-target constant false alarm rate detection method based on signal agent

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Embodiment Construction

[0034] The present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments, and the purpose and effect of the present invention will become clearer. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

[0035] The signal agent-based multi-target constant false alarm rate detection method provided by the present invention can effectively solve the problem of radar system detection performance degradation caused by interference targets in a multi-target environment, and at the same time realize constant false alarm rate through adaptive false alarm adjustment threshold. false alarm rate.

[0036] Such as figure 1 As shown, in the multi-target scene, the millimeter-wave radar is used as the target detection sensor, and the working frequency range is 76-81GHZ. The radar system applies the multi-target constan...

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Abstract

The invention discloses a multi-target constant false alarm rate detection method based on signal agent, and belongs to the technical field of radar constant false alarm rate detection. According to the method, a target and clutters are distinguished by using linear measurement of a radar signal and correlation of a sensing matrix, and then the detected target is removed from an original background sample to obtain a reduced sample. And finally, background level estimation is performed on the reduced sample to obtain a false alarm adjustment threshold, and targets lower than the threshold are eliminated to obtain a final constant false alarm rate detection result. The method provided by the invention can adapt to the sparsity of the signal, does not need to depend on a pre-estimated environment background level to realize target detection, and effectively overcomes a multi-target shielding effect.

Description

technical field [0001] The invention belongs to the technical field of frequency modulated continuous wave (Frequency Modulated Continuous Wave, FMCW) radar multi-target constant false alarm rate (Constant False Alarm Rate, hereinafter referred to as CFAR) detection, and in particular relates to a signal agent-based multi-target CFAR detection method. Background technique [0002] The CFAR detection method can make the FMCW radar system have a stable target detection performance, and at the same time avoid the failure of the radar receiver caused by the high false alarm rate. But most of the existing CFAR detection methods are limited by the estimation of target-clutter environment background level. In the case of multiple targets, interfering targets lead to inaccurate background level estimation, and the radar target detection performance decreases accordingly. Therefore, research on CFAR detection methods in multi-target scenarios has attracted extensive attention. [0...

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/354G01S7/414G01S7/40G08B29/04
Inventor 宋春毅曹智辉李俊杰宋钰莹徐志伟
Owner ZHEJIANG UNIV