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Tracking radar marine small target detection method and system based on inter-frame accumulation

A small target detection and tracking radar technology, applied in the radar field, can solve the problems of limited sea clutter suppression, affecting small target detection, target signal-to-noise ratio loss, etc.

Active Publication Date: 2021-05-25
成都汇蓉国科微系统技术有限公司
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  • Abstract
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Problems solved by technology

Single-frame accumulation does not make full use of the prior echo information to improve the echo signal-to-noise ratio, and inter-frame coherent accumulation can obtain better detection results under good sea conditions, but when the sea conditions are bad, the impact on sea clutter Inhibition will be limited
Inter-frame non-coherent accumulation can obtain better detection results than coherent accumulation under harsh sea conditions, but the benefits of multi-pulse cannot be fully utilized when the sea conditions are good, and the target signal-to-noise ratio will be reduced to a certain extent. loss, which affects the detection of small targets

Method used

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] refer to figure 1 , which is a general flow chart of the present invention based on the tracking radar sea small target detection method based on inter-frame accumulation. Wherein said a kind of tracking radar sea small target detection method based on inter-frame accumulation, comprising the following steps:

[0032] Step 1 Initialize parameters: start the tracking radar, and enter the tracking process based on the obtained prior information of target tracking. The transmitter transmits the radio frequency signal, the receiver receives the radio frequency echo signal, and obtains \*MERGEFORMAT(1)k frame baseband echo signal and k-1 frame target tracking information x after digital down-conversion and AD data collection k-1 ;

[0033] Said tracking information x k-1 Contains target distance R k-1 =[R 1, , R 2 ,...,R k-1...

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Abstract

The invention provides a tracking radar marine small target detection method based on inter-frame accumulation, and the method comprises the steps: enabling multiple frames of data to be connected in parallel, carrying out the non-coherent accumulation of one path of parallel signals, obtaining a corresponding non-coherent accumulation result, carrying out the coherent accumulation of the other path of parallel signals, and obtaining a corresponding coherent accumulation result; and performing target detection on the non-coherent accumulation result to obtain corresponding target trace point information and corresponding range gate information, feeding back to a coherent accumulation signal processing flow, adjusting a detection threshold value based on the range gate information, and performing two-dimensional distance-Doppler detection on the coherent accumulation result based on the adjusted detection threshold value to obtain a corresponding detection result. According to the detection method, the sea clutter texture component is effectively suppressed by fully utilizing the amplitude-time correlation of the sea clutter texture component, and the purposes of suppressing the sea clutter and improving the detection probability of the small target on the sea are achieved.

Description

technical field [0001] The invention belongs to the technical field of radar, in particular to a tracking radar sea small target detection method based on inter-frame accumulation, which is suitable for a type of pulse Doppler tracking radar. Background technique [0002] Radar sea surface target detection is an important branch in the field of radar detection, which is of great significance in both military and civilian fields. In terms of military affairs, in recent years, aircraft and cruise missiles have used low-altitude and ultra-low-altitude penetration. Their flight speed is fast, their height is low, and their radar backscattering cross-section is small. Shore-based and ship-borne radars will encounter sea clutter when monitoring the sea. Object detection problem in wave background. Civilian use involves sea vessels, icebergs, reliefs, reefs, sea surface search and rescue, sea surface monitoring and illegal fishing, etc. [0003] When the radar illuminates the sea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/415Y02A90/10
Inventor 鲁瑞莲金敏费德介汪宗福康腾飞
Owner 成都汇蓉国科微系统技术有限公司
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