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Fast and High Precision Multi-target Positioning via Imaging Strategy |
ZHANG Xiaoling YU Lei WU Xiliang HE Shufeng |
(School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China) |
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Abstract The association between multiple targets and echo data is the main problem for multi-target location method, which causes huge calculation and the problem of extracting the targets accurately. The location method based on Bistatic Range Space Projection (BRSP) can be used for the sake of overcoming the data association problem. While there are two problems existing on the location method of BRSP, the huge calculation and the low resolution. In the face of vast calculation in projection imaging localization, this paper utilizes hierarchical strategy to decrease calculation. The possible targets areas are located with low resolution at first. After that, more precision probable areas are pinpointed via higher resolution from these possible areas. In this way, the calculation of areas without targets can be avoided. Furthermore, results of hierarchical processing are used to be the initial position guess for Taylor-series estimation. Positioning errors could be modified by the iterative correction of Taylor-series estimation. Simulation results indicate a significant improvement in the running time and positioning precision of the proposed method.
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Received: 25 November 2015
Published: 31 May 2016
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Fund: Aeronautical Science Foundation of China (20130180001, 20142080007) |
Corresponding Authors:
ZHANG Xiaoling
E-mail: txlzhang@163.com
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