Accelerated Detection Method of Human Static Objects Used in Impulse Through-Wall Radar

Abstract

The invention discloses a method for accelerated detection of a static target of a human body for an impulse pulse type through-wall radar, the steps of which are as follows: step S1: eliminating background clutter, that is, eliminating the background clutter generated by a completely static target in the echo; S2: Adaptive compensation, that is, to compensate the influence of the sudden change of the medium in the electromagnetic wave propagation path; Step S3: Compensate the energy attenuation of the electromagnetic wave with the propagation distance to meet the constant false alarm requirements in target detection; Step S4: In the Select the appropriate window in the fast and slow time direction, and perform the sliding window point selection operation along the fast time direction; Step S5: Perform Fourier transform on the data obtained by the sliding window in step S4, detect the frequency signal of human respiratory chest movement in the frequency domain, and determine Whether there is a human target in the detection area and accurate positioning. The invention has the advantages of simple principle, easy realization, wide application range and the like.

Description

technical field [0001] The invention mainly relates to the field of search and rescue radars, in particular to an accelerated detection method for human stationary targets used in impulse pulse wall-penetrating radars. Background technique [0002] In the fields of anti-terrorism stability maintenance, hostage rescue and other security detection and emergency rescue, it is a very important task to effectively detect short-range low, small and slow targets, especially targets hidden behind various obstacles. Compared with other detection methods, radar detection has become an effective means of medium penetration detection due to its strong penetrability, high resolution and all-weather active detection. Some practitioners have proposed various through-wall radars for detection. However, there are still some deficiencies in the detection of stationary human targets by existing through-wall radars: [0003] Since the electromagnetic waves emitted by the radar need to penetra...

AI Technical Summary

Problems solved by technology

[0003] Since the electromagnetic waves emitted by the radar need to penetrate the medium for detection, the energy attenuation is serious, resulting in a low signal-to-noise ratio; the detection of human static targets means the detection of physiological characteristics such as chest heaving and heartbeat, which belongs to weak signal detection

Therefore, the existing wall-penetrating radar has low sensitivity, and it takes time to accumulate for the detection of human stationary targets, and the slow detection speed leads to a decrease in the efficiency of search and rescue reconnaissance

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