Azimuth Phase Center Adaptive Adjustment upon Reception for High-Resolution Wide-Swath Imaging

被引：6
作者：
Xu, Wei [1 ,2 ]
Hu, Jialuo [1 ,2 ]
Huang, Pingping [1 ,2 ]
Tan, Weixian [1 ,2 ]
Dong, Yifan [1 ,2 ]
机构：
[1] Inner Mongolia Univ Technol, Coll Informat Engn, Hohhot 010051, Peoples R China
[2] Inner Mongolia Key Lab Radar Technol & Applicat, Hohhot 010051, Peoples R China
来源：
SENSORS | 2019年 / 19卷 / 19期
基金：
中国国家自然科学基金;
关键词：
synthetic aperture radar (SAR); high resolution wide swath (HRWS); azimuth multichannel reconstruction; phase center adaptation; false targets suppression;
D O I：
10.3390/s19194277
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A spaceborne azimuth multichannel synthetic aperture radar (SAR) system can effectively realize high resolution wide swath (HRWS) imaging. However, the performance of this system is restricted by its two inherent defects. Firstly, non-uniform sampling is generated if the pulse repetition frequency (PRF) deviates from the optimum value. Secondly, multichannel systems are very sensitive to channel errors, which are difficult to completely eliminate. In this paper, we propose a novel receive antenna architecture with an azimuth phase center adaptive adjustment which adjusts the phase center position of each sub-aperture to improve multichannel SAR system performance. On one hand, the optimum value of the PRF can be adaptively adjusted within a certain range by adjusting receiving phase centers to obtain uniform azimuth sampling. On the other hand, false targets introduced by residual channel errors after azimuth multichannel error compensation can be further suppressed. The effectiveness of the proposed method to compensate for non-uniform sampling and suppress false targets is verified by simulation experiments.
引用
收藏
页数：15
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