Preprocessing method for radar intermediate-frequency echo signals

An echo signal and preprocessing technology, applied in the field of signal processing, can solve problems such as the inability to fully and accurately realize the preprocessing of intermediate frequency echo signals.
CN112630737APending Publication Date: 2021-04-09SHAANXI CHANGLING ELECTRONICS TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
SHAANXI CHANGLING ELECTRONICS TECH
Publication Date
2021-04-09

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Abstract

The invention provides a preprocessing method of input intermediate-frequency signals. The invention mainly aims to solve the problem that the output performance of a solid-state receiving and transmitting assembly cannot be tested at the absence of no special testing instrument or radar signal processing software or hardware in the prior art. According to the technical schemes of the invention, the method comprises the following steps that: radar real echo signals received by an antenna are converted into multiple paths of digital differential signals through analog intermediate frequency signals obtained through down-conversion of a solid-state transceiving assembly; importing the differential signals into an MATLAB simulation system, and performing down-conversion to obtain baseband signals; carrying out clutter suppression processing on the echo signal condition of the baseband digital signals, and carrying out sidelobe suppression through time domain pulse pressure processing and windowing; suppressing static clutters, sea waves, rain and snow near zero frequency through moving target detection; and selecting different constant false alarm detectors according to echo edge clutter and noise conditions, performing clutter suppression, and displaying a result on a terminal. According to the preprocessing method of the invention, the performance test of the solid-state transceiving assembly can be realized at the absence of special test instrument and radar signal processing software and hardware.
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Description

technical field

[0001] The invention belongs to the technical field of signal processing, and in particular relates to a method for processing radar intermediate frequency echo signals, which can be used for performance detection of solid-state transceiver components without a radar signal processing software and hardware system. Background technique

[0002] As a relatively mature signal processing technology, pulse compression processing can better solve the contradiction between operating distance and resolution because it adopts wide pulse transmission and narrow pulse reception. Solid-state transceiver components have integrated the functions of intermediate frequency modules, microwave components and power amplifier modules, and their performance directly affects the pulse compression processing results of subsequent signals and the display effect of terminal radar echoes.

[0003] Existing potential radar intermediate frequency echo signal processing method comprises ...

Claims

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