An Efficient Clutter Suppression Approach for TOPS SAR System
Konferenz: EUSAR 2014 - 10th European Conference on Synthetic Aperture Radar
03.06.2014 - 05.06.2014 in Berlin, Germany
Tagungsband: EUSAR 2014
Seiten: 4Sprache: EnglischTyp: PDF
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Autoren:
Li, Xueshi; Sun, Guang-Cai; Wu, Min; Zhang, Yi; Xing, Mengdao; Wu, Yufeng (National Key Laboratory of Radar Signal Processing, Xidian University, China)
Inhalt:
Compared with single-channel TOPS SAR, a multichannel TOPS SAR system is capable of imaging a wider swath with a higher azimuth resolution for improved moving target detection. For TOPS SAR, due to antenna beam steering, the azimuth bandwidth of background clutter is much larger than the instantaneous signal bandwidth. Therefore, the background clutter is highly aliased if the PRF is designed to be equal to or less than the instantaneous signal bandwidth, yielding degraded clutter suppression performance. To overcome this problem, a new method, referred to as spectrum compression space-time adaptive processing (SC-STAP), is proposed in this paper.