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Radar signal processing method

A radar signal processing and signal technology, used in radio wave measurement systems, instruments, etc., can solve problems such as the reduction of radar detection ability, and achieve the effect of providing recognition accuracy, improving anti-interference ability, and improving the ability to detect moving targets.

Pending Publication Date: 2021-05-04
AIR FORCE EARLY WARNING ACADEMY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the clutter is usually much stronger than the target signal, the existence of clutter will reduce the ability of radar moving target detection

Method used

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Embodiment Construction

[0034] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] A kind of radar signal processing method of the present invention comprises as follows:

[0036] A secondary canceller is connected before the FFT, and a narrow-band Doppler filter bank is used to achieve matching filtering of the moving target echo pulse train signal, suppress various clutter, and filter ground clutter;

[0037] Concrete: the method of the MTD filter bank that the present invention adopts is the method for MTI cascaded FFT, connects a secondary canceller before FFT, can filter out ground object clutter like this, just can reduce narrow-band filter bank required dynamic range and reduces filter sidelobe requirements. Because DFT is a special transversal filter, the coefficients of the filter bank can be selected according to the definition of DFT, and a fast FFT algorithm is used to realize MTD filtering.

[0038] The...

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Abstract

The invention discloses a radar signal processing method, which comprises the following steps of: connecting a secondary canceller before FFT, and realizing matched filtering of echo pulse train signals of a moving target by using a narrow-band Doppler filter bank, inhibiting various clutters and filtering ground clutters; performing corresponding detection on an input signal, judging whether a signal exists or not through a corresponding criterion, completing radar signal detection by using threshold detection, comparing an output signal obtained after a received signal passes through a processor with a determined preset threshold, and determining that a target exists if the envelope of the input signal before detection is greater than the preset threshold.

Description

technical field [0001] The invention relates to radar signal processing technology, in particular to a method for processing UAV detection radar signals. Background technique [0002] When the radar needs to detect the UAV, when the environment where the target is located is relatively complex, it will be interfered by backgrounds such as various ground objects, waves, clouds, rain, and flocks of birds. These backgrounds also generate echoes, and the interference caused is called For clutter interference. Since the clutter is usually much stronger than the target signal, the existence of clutter will reduce the ability of radar moving target detection Contents of the invention [0003] The technical problem to be solved by the present invention is to solve the above-mentioned deficiencies in the prior art and provide a radar signal processing method. [0004] In order to solve the above-mentioned deficiencies in the prior art, the technical solution adopted by the presen...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/418
Inventor 李浩程伟李晓柏
Owner AIR FORCE EARLY WARNING ACADEMY