Dual matched filtering method and device and electronic equipment

Abstract

The invention discloses a dual matched filtering method and device and electronic equipment. The method comprises the following steps: acquiring an echo signal of a preset signal sent to a moving target; according to the echo signal, obtaining a Doppler channel signal where the target is located; obtaining a delay signal group according to the Doppler channel signal; obtaining a reference signal group according to the Doppler channel signal and the delay signal group; performing matched filtering on the reference signal group to obtain a matched filtering result of the reference signal group; and performing transformation processing on the matched filtering result of the reference signal group to obtain a detection result of the target. According to the method, pulse pressure distortion caused by Doppler frequency shift of signals in conventional matched filtering is eliminated, Doppler tolerance of the signals is eliminated, and a technical basis is provided for improving low-interception anti-interference performance of a radar and improving high-speed small target detection capability; the method can be applied to various types of radars, sonars and navigation equipment, and has popularization and application values.

Description

technical field [0001] The present invention relates to the technical field of signal processing, in particular to a double matched filtering method, device, electronic equipment and computer-readable storage medium. Background technique [0002] With the development of science and technology, matched filtering has become the basic signal processing method in radar, communication, sonar and other systems. The principle of matched filtering is: the wide pulse of the complex modulation waveform is matched and filtered to output a pulse with a greatly narrowed width and a significantly increased amplitude; therefore, matched filtering is also called a pulse compression process. However, in practical applications, the moving target will modulate the electromagnetic wave signal due to the Doppler effect, resulting in a Doppler frequency shift of the target echo signal relative to the transmitted signal. The mismatch between the echo signal and the transmitted signal affects the ...

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Problems solved by technology

[0005] In view of this, it is necessary to provide a double matched filtering method, device, electronic equipment and computer-readable storage medium to solve the mismatch between the echo signal and the transmission signal caused by the Doppler effect in the prior art, resulting in The output pulse is distorted, which ultimately affects the detection effect

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