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Method and device for detecting radar target by adopting multi-window combination and radar system

A radar target and target technology, which is applied in the field of radar systems to achieve the effects of improving distance resolution, improving performance and reducing signal-to-noise ratio

Active Publication Date: 2020-02-18
LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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Problems solved by technology

[0014] The purpose of this application is to provide a method, device and radar system for radar target detection using multi-window joint, to solve or alleviate at least one of the problems in the background technology

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  • Method and device for detecting radar target by adopting multi-window combination and radar system

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[0044] In order to make the purposes, technical solutions and advantages of the application more clear, the technical solutions in the embodiments of the application will be described in more detail below in conjunction with the drawings in the embodiments of the application.

[0045] In order to improve the limitations of the single windowing method used in the radar signal processing target distance and speed detection process, this application proposes a method that uses different types of window functions to detect target distance and speed at the same time, to solve the sidelobe false suppression and distance resolution and The problem of deteriorating signal-to-noise ratio.

[0046] Such as Figure 5 As shown, the method for adopting multi-window joint radar target detection of the present application comprises the following steps:

[0047] S10. The radar receives the echo signal, and obtains a digital baseband signal after AD sampling and digital down-conversion.

[0...

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Abstract

The invention designs a method for detecting a radar target by adopting multi-window combination. The method comprises the following steps: receiving an echo signal; performing primary pulse compression and windowing processing on the distance dimension and the frequency dimension of the echo signal, and then performing two-dimensional constant false alarm rate detection to obtain a first group ofdetection results; performing secondary pulse compression and windowing processing on the distance dimension and the frequency dimension of the echo signal, and then performing two-dimensional constant false alarm rate detection to obtain a second group of detection results, wherein the type of the secondary windowing is different from that of the primary windowing; and if a range gate and a frequency gate corresponding to the target in the second group of detection results do not exist in the first group of detection results, the target is a side lobe false alarm, and if the target in the second group of detection results exists in the first group of detection results, the distance and the frequency calculated by the target in the second group of detection results are taken as the real distance and the frequency of the target. Compared with the prior art that a certain type of window function windowing mode is fixed, the method of the invention maximally utilizes different windowingtypes to suppress side lobe false alarms.

Description

technical field [0001] The application belongs to the technical field of radar signal processing, and in particular relates to a method, device and radar system for radar target detection using multi-window joint. Background technique [0002] Pulse-Doppler Radar (Pulse-Doppler Radar, PD radar) is a radar that uses the Doppler principle to detect targets in the frequency domain. Applying the Doppler effect to airborne radar can make the radar detect sports goals. Select the corresponding pulse repetition frequency according to the different working conditions. The pulse repetition frequency is divided into three types: high heavy, medium heavy and low heavy. [0003] The fast time dimension adopts the matched filter method for distance detection, and can adopt the point frequency or linear frequency modulation method, and the linear frequency modulation method can solve the contradiction between the distance resolution and the detection distance. The slow time dimension is...

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 王勋黄东方魏中伟
Owner LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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