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Dynamic planning track-before-detect method based on iterative processing

A technology of dynamic programming and iterative processing, applied in measuring devices, radio wave measurement systems, radio wave reflection/re-radiation, etc., can solve the problems of high computational complexity of the algorithm, difficulty in ensuring real-time performance of the system, etc., and reduce the amount of calculation , Accurate target movement path, and the effect of suppressing false alarms

Active Publication Date: 2015-07-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, these methods only reduce the amount of data processing in a single sliding window, and cannot essentially solve the problem of repeated calculation of echo data caused by multiple sliding window processing, and the computational complexity of the algorithm when tracking targets for a long time Still very high, it is difficult to guarantee the real-time performance of the system

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  • Dynamic planning track-before-detect method based on iterative processing
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Embodiment Construction

[0035] The present invention mainly adopts the method of computer simulation to verify, and all steps and conclusions are verified and confirmed on MATLAB-R2010b. The specific implementation steps are as follows:

[0036] Step 1. Initialize system parameters:

[0037] Initialize the total number of observation frames M, the length of the sliding window of the dynamic programming tracking algorithm before detection is K, and the detection threshold V T , initialize variable k=1.

[0038] Step 2. Read the kth frame measurement from the radar receiver:

[0039] The kth frame is measured as Z k ={z k (m,n), 1≤m≤N x ,1≤n≤N y} ， z k(m,n) represents the amplitude value of the echo data of the kth frame in the measurement unit (m,n), N x ,N y are the numbers of quantization units in the X direction and the Y direction, respectively.

[0040] Step 3. Accumulate dynamic programming value function:

[0041] If k=1, then use the amplitude value of the first frame echo data cor...

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Abstract

The invention discloses a dynamic planning track-before-detect method based on iterative processing, solves the problem that conventional dynamic planning track-before-detect algorithms based on sliding window processing are large in calculation amount, improves estimation accuracy of the algorithms to target track and lowers false alarm rate of the algorithms. The dynamic planning track-before-detect method is characterized in that when a dynamic planning algorithm is utilized to track a target, a value function of current moment is estimated according to a value function of previous moment; only two adjacent frames of data are iteratively processed at each moment, and combined processing of multiple frames of data is not needed, so that conventional sliding window processing structure is broken through, the problem that calculation amount is increased rapidly due to the fact that echo data are repeatedly processed in conventional methods is solved effectively, estimation accuracy of the algorithms to the target track is improved, value functions of noise state are reduced, realtime target tracking is guaranteed, more accurate target moving paths are provided while false alarm is inhibited, and performance of the algorithms is improved greatly.

Description

technical field [0001] The invention belongs to the field of radar target detection, and in particular relates to the technical field of radar tracking before weak target detection. Background technique [0002] The current radar target detection technology is facing severe challenges. The stealth target has a small reflection cross-sectional area, the target is far away from the radar, and strong clutter backgrounds such as mountains and cities in practical applications make the target echo weak compared to the clutter, and the signal-to-noise ratio of the target is greatly reduced, making it difficult to be detected. detection. [0003] The tracking-before-detection algorithm based on dynamic programming is an effective method for detecting and tracking weak targets. It jointly processes multiple frames of echo data by accumulating value functions, which is an equivalent implementation of exhaustive search, but its efficiency is much higher than that of exhaustive search...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/66G01S7/41
CPCG01S7/41G01S13/66
Inventor 易伟王经鹤李溯淇方梓成孔令讲崔国龙张紫薇李雪婷杨东超
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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