A time domain phase-gradient based ISAR autofocus algorithm

摘要：

Autofocus is a well known required step in ISAR (and SAR) processing to compensate translational motion. This research proposes a time domain autofocus algorithm and discusses its relation to the well known phase gradient autofocus (PGA) technique. Results on simulated and measured data show that the algorithm performs well. Unlike many other ISAR autofocus techniques, the algorithm does not make use of several computationally intensive iterations between the data and image domains as part of the autofocus process. As such, the proposed algorithm could prove to be faster than other techniques. Observations are made regarding the type of phase errors that can be handled, and it is argued that the technique could be posed either as parametric or nonparametric depending on the type of phase errors expected.

关键词： ISAR Autofocus Phase Gradient Time-Domain.

作者: W. Nel E. Giusti M. Martorella M.Y Abdul Gaffar

作者单位: Council for Scientific and Industrial Research (CSIR), South Africa University of Pisa, Italy

会议类型: 国际会议

会议名称: 2011 IEEE CIE International Conference on Radar(2011年IEEE国际雷达会议RADAR 2011)

会议地点: 成都

会议语种:英文

页码: 541-544

在线出版日期: 2011-10-24（万方平台首次上网日期，不代表论文的发表时间）