摘要
常规的高效率合成孔径成像算法都是针对单阵设置的,并且普遍作了Stop-and-Hop假设,当SAS成像系统作用距离较远时,由Stop-and-Hop假设引起的系统误差不容忽略.传统的方法是利用逐点算法进行系统误差修正,计算量大,不适合实时处理.针对这一情况,该文采用收发分置的几何模型处理多子阵SAS回波数据,提出一种多子阵SAS逐线成像算法,修正系统误差的同时提高了运算效率.仿真试验和湖试结果验证了分析的正确性和算法的有效性.
Conventional synthetic aperture imaging algorithms were designed for a mono-static pattern. In synthetic aperture sonar, the receiver has more time to travel during signal transmission relative to synthetic aperture radar. The ＂ Stop-and-Hop＂ approximation is no longer valid and system errors are incurred. The conventional method used to correct system error is computationally time-consuming. A new multi-receiver synthetic aperture sonar imaging algorithm was introduced to eliminate system error and improve computational speed. Simulations and trial results validate the algorithm.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2009年第7期820-823,共4页
Journal of Harbin Engineering University
基金
国家863计划基金资助项目(2007AA091101)
