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Rapid dynamic programming track-before-detect method

A dynamic programming and forward tracking technology, applied in measurement devices, radio wave measurement systems, reflection/re-radiation of radio waves, etc., can solve the problems of increased algorithm complexity, high dimension, and large amount of data.

Active Publication Date: 2015-08-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0003] In the field of radar, the traditional tracking-before-detection method of dynamic programming first needs to uniformly quantize the continuous state space according to the resolution of the radar, and then perform dynamic programming search based on the discrete state space. Significantly higher with the increase of area area and target speed search range
Therefore, for radar systems with high dimensionality and large amount of data, the amount of computation using traditional methods is often unbearable for radar hardware
In order to solve this problem, some dynamic programming tracking before detection methods based on low-threshold processing have been proposed, which can reduce the calculation amount of the algorithm by avoiding the accumulation of some noise-like low-amplitude data, but these methods are still difficult to meet the real-time performance of radar. needs

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Embodiment Construction

[0033] The present invention mainly adopts the method of computer simulation for verification, and all steps and conclusions are verified correctly on MATLAB-R2012b. The specific implementation steps are as follows:

[0034] Step 1. Initialize system parameters:

[0035] The initialization system parameters include: radar distance resolution △r=180m; radar azimuth resolution △a=1.2°; number of radar distance dimension resolution units N r =300; the number of radar azimuth resolution units N a =50; distance dimension preprocessing factor P r =5; azimuth dimension preprocessing factor P a = 3; target speed upper bound V max =800m / s; monitoring distance lower bound r min =100km; observation interval T=6s; total number of observation frames K=6; threshold V T =15.3109; initialize the current frame number k=1.

[0036] Step 2. Quantize the state space:

[0037] Step 2.1, Indicates that the kth frame corresponds to any quantization state of the original measurement, where r ...

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Abstract

The invention discloses a rapid dynamic programming track-before-detect method suitable for a radar system, belongs to the technical field of radar target detection, and relates to a track-before-detect technology of a weak target in a radar system. The method comprises the steps of: firstly carrying out pre-processing on measurement of a radar, and enabling the measurement of the radar to be corresponding to a discrete state space which is less in quantized state; and carrying out dynamic programming searching based on preprocessed data, and estimating a target stat sequence with less calculation amount. Then, by adopting an estimated result, fine searching is carried out on only a few related states, the accurate position of the target is determined, a large amount of meaningless searching is effectively avoided at the same time, and the calculation amount is substantially reduced.

Description

Technical field: [0001] The invention belongs to the technical field of radar target detection, and relates to the detection-before-tracking technology of a weak target in a radar system. Background technique: [0002] Track-before-detection is a technique for faint object detection and tracking. Different from the traditional detection-then-tracking technology, the detection-before-tracking technology does not announce the detection result in a single frame, but through the joint processing of multiple frames of echo data, and uses the correlation of the target state between frames to achieve signal accumulation and noise suppression. Thereby effectively improving the weak target detection performance. Among them, the tracking-before-detection method based on dynamic programming has the advantages of excellent performance and easy implementation, and has been widely used in the fields of optical, infrared, radar and other faint target detection and tracking. [0003] In t...

Claims

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Application Information

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IPC IPC(8): G01S13/72G01S7/41
CPCG01S7/415G01S13/723
Inventor 易伟方梓成王经鹤李溯琪宋海洋崔国龙孔令讲杨晓波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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