Real-time DBS imaging algorithm based on chirp z-transform

被引：0
|
作者：
Yang, Jian [1 ,2 ]
Liu, Chang [1 ]
Wang, Yanfei [1 ]
机构：
[1] Chinese Acad Sci, Inst Elect, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
来源：
IEICE ELECTRONICS EXPRESS | 2012年 / 9卷 / 21期
关键词：
chirp z-transform (CZT); Doppler beam sharpening (DBS); range cell migration correction (RCMC); SAR/GMTI system;
D O I：
10.1587/elex.9.1660
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A novel Doppler beam sharpening (DBS) algorithm based on chirp z-transform (CZT) is proposed in this letter to correct range cell migration (RCM) without prior knowledge of Doppler centroid. Iterations of conventional Doppler centroid estimation algorithms are avoided, and the impact of Doppler centroid estimation error is further circumvented. The processing steps combining DBS and CZT are given based on FFT, which are suitable for real-time projects. Simulation results prove the effectiveness of the proposed algorithm.
引用
收藏
页码：1660 / 1665
页数：6
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