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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.

Pending Publication Date: 2021-04-09
SHAANXI CHANGLING ELECTRONICS TECH
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Problems solved by technology

Therefore, it is impossible to fully and accurately realize the preprocessing of the actual input IF echo signal

Method used

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  • Preprocessing method for radar intermediate-frequency echo signals
  • Preprocessing method for radar intermediate-frequency echo signals
  • Preprocessing method for radar intermediate-frequency echo signals

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[0026] The implementation incentives and effects of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that this embodiment is only for describing the present invention and does not constitute any limitation to the present invention.

[0027] refer to figure 1 , the concrete realization steps of the present invention are as follows:

[0028] Step 1.AD sample storage.

[0029] 1.1) Set the sampling frequency and timing parameters of the AD sampling device, convert the real echo signal received by the radar into an analog intermediate frequency signal through a solid-state transceiver component, and then convert the analog intermediate frequency signal into a multi-channel digital differential signal;

[0030] 1.2) Set the frame synchronization timing, and store the multi-channel digital differential signals in strict accordance with the frame synchronization timing.

[0031] Step 2. Import the multi-c...

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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.

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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Application Information

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IPC IPC(8): G01S7/41G01S7/40
CPCG01S7/41G01S7/4004Y02A90/10
Inventor 薛卫东王文军荆恒石美娥陈立曹鹏秦征
Owner SHAANXI CHANGLING ELECTRONICS TECH
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