DBS imaging based on Keystone transform

To correct the range walk through resolution cell in Doppler beam sharpening （DBS） imaging, a new DBS imaging algorithm based on Keystone transform is proposed. Without the exact values of the movement parameters and the look angle of the radar platform in the multi-targets environment, a linear tra...

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Bibliographic Details
Published in:Journal of systems engineering and electronics 2012-06, Vol.23 (3), p.342-348
Main Authors: Tian, Jing, Cui, Wei, Ma, Lin, Wu, Siliang
Format: Article
Language:English
Subjects:
Algorithms
Azimuth
Computation
DBS
Doppler
Doppler effect
Imaging
Keystone变换
Transforms
传输形式
多普勒模糊
多目标环境
成像算法
方位分辨率
计算负荷
运动参数
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Summary:To correct the range walk through resolution cell in Doppler beam sharpening （DBS） imaging, a new DBS imaging algorithm based on Keystone transform is proposed. Without the exact values of the movement parameters and the look angle of the radar platform in the multi-targets environment, a linear trans- form on the received data is employed to correct different range walk values accurately under the condition of Doppler frequency ambiguity in this algorithm. This method can realize the cohe- rent integration in azimuth dimension and improve the azimuth resolution. In order to reduce the computational burden, a fast implementation of Keystone transform is used. Theoretical anal- ysis and simulation results demonstrate the effectiveness of the new algorithm. And through comparing the computational load of the fast implementation with several other algorithms, the real-time processing ability of the proposed algorithm is superior to that of other algorithms.
ISSN:1004-4132
1004-4132
DOI:10.1109/JSEE.2012.00042