Strong clutter signal suppression method and system based on stepped frequency through-wall radar system

Abstract

The invention discloses a method for suppressing strong clutter signals based on a step-frequency wall-penetrating radar system, comprising the following steps: S1: receiving wall-penetrating echo signals, where the echo signals include target echo signals and strong clutter signals; S2: Use the preset signal as the cancellation signal of the strong clutter signal, and perform cancellation processing on the cancellation signal and the strong clutter signal; S3: Perform signal processing on the signal processed by S2, and generate a new signal according to the signal processing result The cancellation signal; S4: using the new cancellation signal as the preset signal, repeating S2-S4 until the imaging result meets the requirements. The invention also discloses a strong clutter signal suppression system based on the stepping frequency wall-penetrating radar system. The present invention is based on the strong clutter signal suppression method and system of the step frequency wall-penetrating radar system, which solves the problem of blurred target signal imaging caused by excessive wall echo in the traditional strong clutter cancellation scheme. Realize the cancellation of strong clutter signals, so that strong clutter signals can be effectively suppressed.

Description

technical field [0001] The invention relates to the technical field of through-wall radar, in particular to a method and system for suppressing strong clutter signals based on a step-frequency through-wall radar system. Background technique [0002] Electromagnetic waves have good penetrability to obstacles such as walls. Based on this feature, through-the-wall radar realizes the tracking and identification of targets behind obstacles. At present, through-the-wall radar is mainly used in military and civilian fields such as urban street fighting, anti-terrorism and earthquake rescue. [0003] The through-wall radar sends out electromagnetic wave signals through the transmitting antenna, and uses the receiving antenna to receive the echo signals. The received echo signal includes the following types of signal components: the direct coupling signal between the receiving antenna and the transmitting antenna; one or more reflection signals of the wall; the electromagnetic wave ...

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is that the existing step-frequency wall-penetrating radar cannot normally image the target, and the purpose is to provide a strong clutter signal suppression method and system based on a step-frequency wall-penetrating radar system to solve the above problems

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