| IMPROVEMENT OF PHASE GRADIENT AUTOFOCUS ALGORITHM |
| |
| 作者姓名： | 李立伟 毛士艺 刘莹 |
| |
| 作者单位： | Department of Electronic Engineering，Beijing University of Aeronautics and Astronautics，Beijing，100083，China |
| |
| 摘 要： | ＩＭＰＲＯＶＥＭＥＮＴＯＦＰＨＡＳＥＧＲＡＤＩＥＮＴＡＵＴＯＦＯＣＵＳＡＬＧＯＲＩＴＨＭＬｉＬｉｗｅｉ（李立伟），ＭａｏＳｈｉｙｉ（毛士艺），ＡｓｉｆＲａｚａ，ＬｉｕＹｉｎｇ（刘莹）（ＤｅｐａｒｔｍｅｎｔｏｆＥｌｅｃｔｒｏｎｉｃＥｎｇｉｎｅｅｒｉｎｇ...
|
IMPROVEMENT OF PHASE GRADIENT AUTOFOCUS ALGORITHM |
| |
| Li Liwei,Mao Shiyi,Asif Raza,Liu Ying.IMPROVEMENT OF PHASE GRADIENT AUTOFOCUS ALGORITHM[J].Chinese Journal of Aeronautics,1998(3). |
| |
| Authors: | Li Liwei Mao Shiyi Asif Raza Liu Ying |
| |
| Abstract: | The phase error estimated by phase gradient autofocus(PGA) is not based on a finite order polynomial mode, so PGA has a good autofocus property for arbitrary order phase error and is fit for high resolution airborne SAR. But PGA has two shortcomings: first, it has a worse estimation property for fast changing phase error; second, there exists a section of linear phase in the phase error estimated by this algorithm. This paper introduces the idea of rank one phase estimate (ROPE) autofocus technique, and improves PGA. The improved PGA(IPGA) can successfully overcome both these shortcomings of PGA. |
| |
| Keywords: | high resolution airborne SAR autofocus algorithm phase gradient autofocus(PGA) rank one phase estimation(ROPE) |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
