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Target track-before-detect (TBD) method based on multi-frame coherent integration

A technology of coherent accumulation and forward tracking, which is applied in measuring devices, radio wave measurement systems, radio wave reflection/re-radiation, etc., can solve the problems of large data processing volume and low detection efficiency

Inactive Publication Date: 2012-01-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

In order to achieve good detection performance, the traditional non-coherent detection-before-tracking algorithm often needs to accumulate multiple frames of echo data, which has a large amount of data processing and low detection efficiency.

Method used

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  • Target track-before-detect (TBD) method based on multi-frame coherent integration
  • Target track-before-detect (TBD) method based on multi-frame coherent integration
  • Target track-before-detect (TBD) method based on multi-frame coherent integration

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Embodiment Construction

[0063] The present invention mainly adopts the method of simulation experiment to verify, and all steps and conclusions are verified correctly on MATLAB7.0. The specific implementation steps are as follows:

[0064] Step 1. Multi-frame coherent accumulation TBD data initialization

[0065] Initialization system parameters include: radar transmission pulse repetition period T = 1ms; radar distance resolution δ r =20m; the number of radar range sampling points r=100; the minimum radial velocity V of the target min =250m / s and the maximum radial velocity V max =450m / s(V min and V max From the prior information of the target); the number of data frames for coherent processing K=3; the number of azimuths N=20 of the spatial division of each cycle of radar scanning, and the number of pulses M=16 emitted by each azimuth;

[0066] Step 2. Multi-frame echo data is spliced ​​in the slow time dimension

[0067] Randomly take 3 frames of echo data continuously received by the radar ...

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Abstract

The invention provides a target track-before-detect (TBD) method based on multi-frame coherent integration. The method is characterized in that a new TBD method is provided aiming at the fact that when multi-frame integration is carried out, the phase information of target echo is not utilized in the traditional TBD method. According to the method provided by the invention, a signal to noise ratio is improved through multi-frame echo coherent integration by utilizing the phase information of the target echo; and by using the method in the invention, the detection of a weak target can be effectively achieved under the condition of less echo data frame numbers, the detection efficiency is improved, and the position speed information of the target is provided while detecting so as to realizethe track of the target.

Description

technical field [0001] The invention belongs to the technical field of radar target detection, and in particular relates to the technical field of radar detection of weak targets under low signal-to-noise ratio. Background technique [0002] With the development of target stealth technology, radar is increasingly facing the threat of stealth aircraft, missiles and other small radar cross-section targets. Therefore, the detection and tracking of weak moving targets in the environment of low signal-to-noise ratio has aroused widespread attention in the field of radar signal processing. Using long-time signal accumulation to improve the signal-to-noise ratio is an effective algorithm for the detection of weak moving targets. In the existing early warning radar system, in order to obtain a long warning time, the range of the radar is relatively long, and in order to prevent the generation of distance ambiguity, the pulse repetition frequency is low. Under the low repetition ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/66G01S7/41
Inventor 张晓玲王瑞军
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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