Method for detecting micro-motion target through-wall radar

A technology of micro-moving targets and detection methods, which is applied in the directions of measurement devices, radio wave measurement systems, radio wave reflection/reradiation, etc., and can solve the problems of difficult Doppler frequency extraction, poor detection effect, and low signal-to-noise ratio

Inactive Publication Date: 2019-09-10
CHANGZHOU NO 4 RADIO FACTORY
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  • Abstract
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  • Claims
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Problems solved by technology

At present, through-the-wall radar has poor detection effect on micro-moving targets such as heartbeat and breathing, and it is difficult to quickly detect micro-moving targets and read their d

Method used

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  • Method for detecting micro-motion target through-wall radar
  • Method for detecting micro-motion target through-wall radar
  • Method for detecting micro-motion target through-wall radar

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Embodiment Construction

[0069] In order to make the object, technical solution and effect of the present invention clearer and clearer, the following examples are given to further describe the present invention in detail. It should be pointed out that the specific implementations described here are only used to explain the present invention, not to limit the present invention.

[0070] Such as figure 1 As shown, the method of the present invention is divided into four steps of pulse compression, clutter suppression, coherent accumulation, and constant false alarm detection, step 1: performing pulse compression processing on the collected intermediate frequency echo signal; step 2: processing the The signal is subjected to clutter suppression processing; step 3: the signal processed in step 2 is subjected to coherent accumulation; step 4: the signal processed in step 3 is subjected to constant false alarm detection. The specific steps and parameters are as follows:

[0071] Step 1. Pulse Compression...

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Abstract

The invention discloses a method for detecting a micro-motion target of a through-wall radar, and belongs to the field of radar detection and the field of through-wall radar detection. The method fordetecting the micro-motion target of the through-wall radar comprises the following steps that collected intermediate frequency echo signal is subjected to pulse compression treatment; a narrowband filter is designed according to Doppler frequency shift characteristics of a micro-motion target and used for suppressing out-of-band clutter; the signal after clutter suppression treatment is subjectedtocoherent integration; the treated signal is subjected to constant false alarm detection; the pulse compression increases the signal-to-noise ratio and distance accuracy; the clutter suppression caneffectively suppress strong clutter behind the obstacle; according to the method for detecting the micro-motion target of the through-wall radar,on the basis of the analysis of the Doppler frequencyshift characteristics of the micro-motion target, and weak echo waves of the micro-motion target behind a wall are subjected to treatments such as targeted wave filtering, amplification, and extraction, and effective detection of the micro-motion target is achieved.

Description

technical field [0001] The invention belongs to the field of radar detection and the field of through-wall radar detection, in particular to a method for detecting micro-moving targets of through-wall radar. Background technique [0002] Through-wall detecting radar (TWDR), referred to as through-wall radar, is a device that detects targets behind walls or other obstacles through electromagnetic wave signals. Through-wall radar detects and tracks targets behind obstacles by processing and analyzing echo signals. Through-the-wall radar is mainly used in special operations, anti-terrorism and stability maintenance, emergency rescue and disaster relief and other fields. At present, through-the-wall radar has poor detection effect on micro-moving targets such as heartbeat and breathing, and it is difficult to quickly detect micro-moving targets and read out their distance in the background of clutter. In addition, the existing detection methods commonly used in through-wall ra...

Claims

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Application Information

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IPC IPC(8): G01S13/88G01S7/41
CPCG01S7/414G01S13/888
Inventor 陶进王慧慧叶兵马巍袁红伟柯新
Owner CHANGZHOU NO 4 RADIO FACTORY
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