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Sea surface floatingtypedim target detecting method

A weak target and detection method technology, which is applied in the field of radar detection of weak targets floating on the sea surface, can solve problems such as the inability of detection algorithms, achieve good constant false alarm performance, improve echo signal-to-noise ratio and detection performance, and increase reliability. Effects of Sexuality and Effectiveness

Active Publication Date: 2019-09-06
LINGBAYI ELECTRONICS GRP
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Problems solved by technology

[0007] This invention aims at the problem that the weak targets floating on the sea surface are submerged by strong sea clutter in the time domain and frequency domain, making the traditional detection algorithm helpless, and proposes a multi-frame Backtracking Correlation Method for Floating Faint Targets on the Sea

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  • Sea surface floatingtypedim target detecting method
  • Sea surface floatingtypedim target detecting method
  • Sea surface floatingtypedim target detecting method

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[0023] refer to figure 1 . According to the present invention, first, the radar signal processing system receives a frame of echo data in a certain direction, which is also a pulse echo. Specifically, if the current frame is the kth frame, then the adjacent kth frame is echoed Wave...The k-N+1th frame echo performs intra-frame preprocessing; the intra-frame preprocessing module performs Log-t / CFAR detection on the single-frame radar echo, and removes noise and a large number of low energy sea clutter; then, the N-frame backtracking correlation processing module performs two threshold judgments on the adjacent N-frame data, specifically, the joint N-frame M / N processing module uses the band path The speed-oriented M / N detection technology performs joint N-frame M / N processing, discards the data that has not passed the threshold, and retains the data that has passed the threshold; The N accumulation path calls back the N frames of raw data that have passed the M / N threshold, a...

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Abstract

The invention discloses a sea surface floating type dim target detecting method.The problem that the sea surface floating typedim target is flooded by strong sea clutter in time domain and frequency domains, and consequently, the traditional detection algorithm is helpless is overcome. According to thetechnical scheme of the sea surface floating type dim target detecting method, a radar signal processing system receives pulse-echo data on a certain position, a large amount of noise and low energy sea clutter are removedthrough a Log-t / CFAR detector; two times of threshold decision-making are conducted on adjacent N frames of data, M / N detection technology with radial velocity is used for joint N frame M / N processing, data which have not passed a threshold are discarded, and the data whichhave passed the threshold are retained; N frames of original data are called back along a M / N accumulation path which has passed the threshold, and characteristics of the N frames of the original dataare extracted, then characteristic domain decision are conducted according to the characteristics, and target track and velocity information results are outputted. According to thesea surface floating type dim target detecting method,the sea surfacefloating typedim target can be effectively detected.

Description

technical field [0001] The invention relates to a radar detection method for weak targets floating on the sea surface. Background technique [0002] With the continuous exploration of unknown fields and the continuous development of science and technology, the ocean plays an increasingly important role in the fields of national defense, scientific research, and people's livelihood. However, low observable targets on the sea surface (periscopes, floating mines, frogmen, etc.) pose a serious threat to the protection of ships and islands and reefs. Oil spills, ice floes, and wrecks on the sea surface will cause serious harm to marine ecology and navigating ships. On the one hand, in order to avoid danger, it is necessary to detect and understand the situation of these targets on the sea surface in real time to give countermeasures. On the other hand, due to the existence of complex and strong sea clutter, the radar cross-sectional area of ​​the target is greatly reduced, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41G01S13/58
CPCG01S13/581G01S7/414
Inventor 帅晓飞高节狄中泉邓桂福蒋易霖夏微微姜旭先曾御林
Owner LINGBAYI ELECTRONICS GRP
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