应用多收发孔径实现高分辨率宽测绘带的合成孔径雷达研究
doi: 10.3724/SP.J.1146.2006.00140
Study on High Resolution, Wide Swath Synthetic Aperture Radar Using Multiple Transmit-Receive Apertures
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摘要: 测绘带宽和分辨率是合成孔径雷达(SAR)系统的两个关键指标，但SAR的脉冲工作方式限制了分辨率和测绘带宽的同时提高。为了解决这一问题，该文采用多个发射机和接收机进一步展宽测绘带和提高分辨率，同时增加了平均发射功率，提高了信噪比。文中介绍该技术的实现方法，并通过实际参数仿真与常规SAR和采用单发射机的多波束SAR进行了对比，证明了进一步展开测绘带的可行性。Abstract: The most important specifications of space-borne Synthetic Aperture Radar (SAR) are resolution and swath width. But in conventional SAR, there is a well known trade-off between them because of the pulse mode. In this paper, a new method of multiple azimuth beams is proposed using multiple transmit-receive apertures to further improve the swath width and resolution in azimuth. In addition, it should be noticed that the radiation gain or the equivalent isotropic radiated power per unit area can be greatly increased and the Signal-Noise Rate (SNR) also becomes better. The implement of this method is introduced and comparison with STMAB method and conventional SAR is made with computer simulations, and the effectiveness of this method is illustrated.
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Currie A. Wide-swath SAR imaging with multiple azimuth beams. IEE Colloquium on Synthetic Aperture Radar, London, 1989, Nov.29: 3/1-3/4.[2]Currie A and Brown M A. Wide-swath SAR. IEE Proc.-Radar Sonar and Navigation, 1992, 139(2): 122-135.[3]Cooper P S.[J].Wons A F, and Gaskell A P. High resolution synthetic aperture radar using a multiple sub-band technique. Radar97, Edinburgh.1997,:-[4]Flores B C, Solis E A, and Thomas G. Chaotic signals for wideband radar imaging[J].Proc. of SPIE.2002, Vol.4727:100-111[5]Ding Kai and Yang Ruliang. Point target imaging simulation using chaotic signals. IEEE National Radar Conference Proceedings, Arlington, USA, 2005: 847-850.[6]中航雷达与电子设备研究院. 雷达系统. 北京：国防工业出版社，2005: 83-84.[7]李世强. 高分辨率宽测绘带合成孔径雷达系统研究. [博士论文], 北京：中国科学院电子学研究所，2004. -
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