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A detection system and detection method for slow and small targets in sea clutter background

A detection method and small target technology, applied in the field of slow small target detection system, to achieve the effect of improving detection probability, engineering feasibility, and suppressing sea clutter false alarm

Active Publication Date: 2017-04-12
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology

This application can solve the problem of radar looking down to detect small slow-moving targets in the background of sea clutter, and adopts the time-frequency domain partition CFAR processing technology to decompose the target echo and sea clutter data into a two-dimensional plane in the time-frequency domain for processing

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  • A detection system and detection method for slow and small targets in sea clutter background
  • A detection system and detection method for slow and small targets in sea clutter background
  • A detection system and detection method for slow and small targets in sea clutter background

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Embodiment Construction

[0058] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0059] A detection system for slow and small targets under the background of sea clutter, the detection system includes: a radar transceiver unit for detecting and obtaining signals of slow moving small targets under the background of sea clutter; connected to the output end of the radar transceiver unit The radar echo processing unit; the detection unit connected to the output end of the radar echo processing unit.

[0060] In this embodiment, a data processor whose model is ADSP-TS201 is used as the radar echo processing unit and the detection unit respectively.

[0061] Such as figure 1 As shown in , a detection method of slow and small targets in the background of sea clutter, the method includes the following steps:

[0062] S1, the radar transceiver unit acquires the signal of a slow-moving small target u...

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Abstract

The invention discloses a system and a method for detecting a low-speed small target under a sea cluster background. The method includes that S1, a radar transceiving unit acquires signals of the low-speed moving small target under the sea cluster background; S2, the radar transceiving unit sends received signals to a radar echo processing unit to be processed to generate radar echo data and sends the radar echo data to a detection unit; S3, the detection unit processes multiple continuous radar echoes and establishes corresponding time frequency domain two-dimension planar graphs to effectively eliminate false-alarm targets in different areas. The system and the method are suitable for detection of dim and small targets moving at low speed under sea cluster background interference during downward-looking detection of sea-surface targets through radar. By the system and the method, the problem of radar downward-looking detection of the low-speed moving small target under the sea cluster background can be solved; time frequency domain CFAR (constant false alarm rate) processing technology is adopted to decompose target echoes and sea cluster data to a time frequency domain two-dimension plane for processing.

Description

technical field [0001] The invention relates to a radar target detection technology, in particular to a detection system and a detection method for slow small targets under the background of sea clutter. Background technique [0002] The existing radar system has relatively mature detection methods for high-speed moving small targets in the background of the sea. According to the difference in the frequency domain between echo Doppler and sea clutter Doppler of high-speed moving small targets, the detection of targets in the clutter-free area of ​​the frequency domain is realized. However, the radar echo Doppler and sea clutter Doppler of slow and weak targets are close to 0, and the echo of small targets will be "submerged" in the sea clutter, which will affect the correct detection of the radar system. [0003] Among them, one of the existing technologies proposes a BOS-CFAR target detection method, which uses a dual-parameter detection method to detect targets under the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/414
Inventor 王志诚张天键吉峰邹波余渝生
Owner SHANGHAI RADIO EQUIP RES INST
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