机载多通道SAR-GMTI的杂波抑制方法
doi: 10.3724/SP.J.1146.2007.00923
The Clutter Suppression Method of Airborne Multi-channel SAR-GMTI System
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摘要: 该文研究机载多通道合成孔径雷达地面运动目标检测中的杂波抑制问题。杂波抑制是地面运动目标检测的重要问题，而通道间的相干性是影响杂波抑制的一个重要因素。对于多通道系统来讲，通道之间无论是通道特性还是天线的方向图都会存在差异，影响通道间的相干性。为改善杂波抑制比，该文通过通道均衡来提高通道间的相干性，并利用自适应相消的方法进一步抑制杂波。实测数据验证了该文方法的有效性。
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关键词:
- 合成孔径雷达 /
- 地面运动目标检测(GMTI) /
- 通道均衡
Abstract: This paper investigates the clutter suppression problem of airborne multi-channel SAR-GMTI system. A key problem for ground moving target indication is clutter suppression, which is sensitive to the correlation of channels. For the multi-channel system, there are differences among the characteristic of two channels and also the antenna patterns, which worse the correlation of channels. This paper proposes a channel equalization method and an adaptive clutter canceling method to improve the clutter suppression ratio. Theoretical results are evaluated and illustrated with experimental airborne SAR data. -
[1] Yadin E. A performance evaluation mode for a two portinterferometer SAR-MTI. IEEE 1996 National RadarConference, Ann Arbor, Michigan, USA. May 1996: 261-266. [2] Wu Shunjun and Li Yingjun. Adaptive channel equalizationfor space-time adaptive processing. IEEE InternationalRadar Conference, 8-11 May 1995: 624-628. [3] 林幼权. 机载合成孔径成像与地面动目标检测技术研究. [博士论文], 西安电子科技大学, 2000.Lin Youquan. Study of SAR and GMTD for airborne radar.[Ph.D. dissertation], Xidian University, 2000. [4] Soumekh M. Moving target detection and imaging using anX-band along-track monopulse SAR[J].IEEE Trans. on Aerosp.Electron. Syst.2002, 38(1):315-333 -
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