Self-adaptive constant false alarm detecting method used for detecting radar video signals

A constant false alarm detection, video signal technology, applied in the direction of measuring devices, using re-radiation, radio wave measurement systems, etc., can solve the problems of being unable to adapt to uniform noise and dense targets at the same time

Inactive Publication Date: 2015-03-25
THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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Problems solved by technology

[0005] In order to solve the above technical problems, the present invention discloses an effective self-adaptive CFAR detection method for radar video signal detection, whi

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  • Self-adaptive constant false alarm detecting method used for detecting radar video signals
  • Self-adaptive constant false alarm detecting method used for detecting radar video signals
  • Self-adaptive constant false alarm detecting method used for detecting radar video signals

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Embodiment Construction

[0022] By analyzing whether the video signal in the estimation unit is uniform and whether the amplitude levels of the two are consistent, the present invention adaptively switches the full-average CFAR detector, the average-sorting selects the small constant false alarm detector, and the average-sorting selects the large constant false alarm detector. False alarm detector, first half average constant false alarm detector and second half average constant false alarm detector, so as to overcome the problem that a single detector cannot adapt to various environments such as uniform noise, dense target, uneven clutter area, and clutter edge defect. The invention can estimate the environment of the detection unit more accurately and effectively reduce the detection loss.

[0023] When the radar video signal is detected in the present invention, the video signal of the current azimuth is detected by sliding windows one by one along the distance unit.

[0024] The specific implemen...

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Abstract

The invention discloses a self-adaptive constant false alarm detecting method used for detecting radar video signals, and belongs to the field of radar signal processing. According to the method, whether the video signals in estimation units are uniform or not and whether the amplitude levels of the two estimation units are consistent or not are analyzed, an overall average constant false alarm detector, an average-sorting small-choosing constant false alarm detector, an average-sorting large-choosing constant false alarm detector, a front half average constant false alarm detector and a rear half average constant false alarm detector are switched in a self-adaptive mode, and therefore the defect that a single detector cannot adapt to various environments with uniform noise, dense targets, uneven clutter regions, clutter edges and the like is overcome. The environment where a detecting unit is located can be estimated more accurately, and the detection loss can be effectively reduced.

Description

technical field [0001] The invention belongs to the field of radar signal processing, and relates to a method for adaptive detection of radar video signals, in particular to a method capable of making statistics on both sides of a detection unit and estimating unit video signal characteristics to self-adaptively switch constant false alarm detectors. Background technique [0002] During radar video signal processing, the video signals in a certain direction are slid one by one for constant false alarm detection, such as figure 1 shown. Calculate the average video signal amplitude u of the front side estimation unit and the rear side estimation unit respectively b and u l , and then sent to the estimation processing module. If the estimation processing module averages the two as the final amplitude level, it is a full average constant false alarm detection; if the estimation processing module caches the larger value of the two, the video signal in the reference unit of the...

Claims

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Application Information

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IPC IPC(8): G01S7/40G01S13/89
CPCG01S7/40G01S13/89
Inventor 俞剑茅文深刘文松张振华顾晶翟海涛陈炜浩李强姜立萨出拉赵玉丽王金宁王潇
Owner THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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