Radar signal processing method for detecting low, slow and small target under complex clutter background

A radar signal processing, low-slow and small target technology, applied in radio wave measurement system, radio wave reflection/re-radiation, measurement devices, etc., can solve the problem of low target echo Doppler frequency, difficult clutter performance analysis, The detection algorithm is difficult to evaluate and other problems, so as to overcome the calculation complexity and processing time, improve the adaptability, and reduce the effect of constant false alarm loss

Active Publication Date: 2020-11-10
NANJING UNIV OF SCI & TECH
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Problems solved by technology

In addition, when the current low-slow and small-target radar detects targets, it faces complex clutter environments, difficult clutter performance analysis, low signal-to-clutter ratio echoes and complex non...

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  • Radar signal processing method for detecting low, slow and small target under complex clutter background
  • Radar signal processing method for detecting low, slow and small target under complex clutter background
  • Radar signal processing method for detecting low, slow and small target under complex clutter background

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Embodiment Construction

[0070] combine figure 1 , a radar signal processing method for low-slow and small target detection under complex clutter background, the method comprises the following steps:

[0071] Step S100, sampling the received moving target echo pulse sequence, performing spectrum analysis on the slow time data sequence in each range unit of the echo pulse sequence to obtain Doppler domain data;

[0072] Step S200, using the sliding window processing method to process the data in each Doppler channel, obtaining the statistical variance and statistical mean value in each reference window and judging the uniformity of the background clutter in each reference window;

[0073] Step S300, according to the statistical variance and the statistical mean ratio, adaptively select the constant false alarm detection algorithm for processing, the constant false alarm detection algorithm includes unit average (CA), maximum (SO), maximum (GO);

[0074] Step S400, performing multi-dimensional target d...

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Abstract

The invention provides a radar signal processing method for detecting a low, slow and small target under a complex clutter background. The method comprises the following steps: performing spectral analysis on a slow time data sequence in each distance unit of a sampled moving target echo pulse sequence to obtain Doppler domain data; carrying out sliding window processing on the Doppler domain dataand acquiring a statistical variance and a statistical mean value in each reference window and a statistical mean value ratio of a front reference window to a rear reference window; judging the uniformity of background clutters in each reference window according to the statistical variance and the statistical mean value; selecting a corresponding constant false alarm detection algorithm accordingto the uniformity of the background clutter to obtain a target trace point in the reference window; and obtaining the speed, pitch, orientation and distance of the target according to the trace pointinformation.

Description

technical field [0001] The invention relates to a radar signal processing technology, in particular to a radar signal processing method for detecting low, slow and small targets under the complex clutter background. Background technique [0002] Low, small and slow targets refer to targets with slow flying speed, low altitude, and small scattering area, mainly including drones, model aircraft, paragliders, satellite cruise missiles, and birds. Small and slow targets have the characteristics of strong concealment and good aggressiveness, so in the detection process, there are problems such as difficulties in reconnaissance, management and control, and strikes. In recent years, with the rapid development of UAV aircraft and the gradual opening of low-altitude airspace control, the incidents of low-slow and small-target violations are increasing. "Black flying" drones that fly without permission in civil aviation airports and major event venues have repeatedly appeared, seriou...

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Application Information

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IPC IPC(8): G01S7/36G01S13/88
CPCG01S7/36G01S13/88Y02A90/10
Inventor 王昊江珊徐达龙陶诗飞王岩
Owner NANJING UNIV OF SCI & TECH
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