A Novel Speed Compensation Method for ISAR Imaging with Low SNR

被引：13
|
作者：
Liu, Yongxiang [1 ]
Zhang, Shuanghui [1 ]
Zhu, Dekang [1 ]
Li, Xiang [1 ]
机构：
[1] Natl Univ Def Technol, Coll Elect Sci & Engn, Changsha 410073, Hunan, Peoples R China
来源：
SENSORS | 2015年 / 15卷 / 08期
关键词：
ISAR; radar imaging; SNR; cubic phase function; FM SIGNAL;
D O I：
10.3390/s150818402
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In this paper, two novel speed compensation algorithms for ISAR imaging under a low signal-to-noise ratio (SNR) condition have been proposed, which are based on the cubic phase function (CPF) and the integrated cubic phase function (ICPF), respectively. These two algorithms can estimate the speed of the target from the wideband radar echo directly, which breaks the limitation of speed measuring in a radar system. With the utilization of non-coherent accumulation, the ICPF-based speed compensation algorithm is robust to noise and can meet the requirement of speed compensation for ISAR imaging under a low SNR condition. Moreover, a fast searching implementation strategy, which consists of coarse search and precise search, has been introduced to decrease the computational burden of speed compensation based on CPF and ICPF. Experimental results based on radar data validate the effectiveness of the proposed algorithms.
引用
收藏
页码：18402 / 18415
页数：14
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