基于脉内波束指向的单相位中心多波束星载SAR系统接收端DBF处理

李杨; 齐维孔; 黄杰文; 禹卫东

doi:10.3724/SP.J.1146.2010.00784

基于脉内波束指向的单相位中心多波束星载SAR系统接收端DBF处理

doi: 10.3724/SP.J.1146.2010.00784

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出版历程
- 收稿日期: 2010-07-28
- 修回日期: 2010-12-22
- 刊出日期: 2011-05-19

Digital Beamforming for Single Phase Center Multi-beam Spaceborne SAR Based on Intrapulse Beamsteering

摘要

摘要: 该文将单相位中心多波束(SPCMB)星载SAR系统与脉内波束指向相结合，有效地解决了传统SPCMB- SAR系统方位模糊较大的问题。该文推导了接收端方位向、距离向及2维联合数字波束形成(DBF)的处理方法，并归纳出先方位向DBF后距离向DBF，先距离向DBF后方位向DBF，以及2维DBF 3种处理流程。同时分析了该系统的主要系统参数，对比了3种处理流程的数据率和计算复杂度。仿真验证了3种处理方法的有效性，并通过模糊度分析证明采用该系统能降低方位模糊和距离模糊，有效实现高分辨率宽测绘带成像。
- 合成孔径雷达 /
- 单相位中心多波束 /
- 脉内波束指向 /
- 数字波束形成 /
- 模糊分析
Abstract: This paper studies single phase center multi-beam spaceborne SAR based on intrapulse beamsteering by combining spaceborne Single Phase Center Multi-Beam (SPCMB-SAR) and intrapulse beamsteering in order to reduce large azimuth ambiguity. The principle of digital beamforming for receiving signal process is explored, including azimuth DBF, elevation DBF and two-dimensional DBF. Three kinds of DBF processing methods are proposed, including azimuth DBF first and elevation DBF later, elevation DBF first and azimuth DBF later, and two-dimensional DBF. The primary system parameters are analyzed. Data rate and calculation complexity of the three methods are compared. Simulation results show that all methods are effective. Ambiguity analysis confirms that the SPCMB-SAR system proposed in this paper can reduce range ambiguity and azimuth ambiguity and realize high resolution wide swath SAR imaging effectively.
- SAR /
- Single Phase Center Multi-Beam (SPCMB) /
- Intrapulse beamsteering /
- Digital beamforming /
- Ambiguity analysis

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Freeman A, Johnson W, and Huneycutt B, et al.The 'myth' of the minimum SAR antenna area constraint[J]. IEEE Transactions on Geoscience and Remote Sensing, 2000, 38(1): 320-324.[2] Krieger G, Gebert N, and Moreira A. Multidimensional waveform encoding: a new digital beamforming technique for radar remote sensing[J]. IEEE Transactions on Geoscience and Remote Sensing, 2008, 46(1): 31-46.[3] Wang Wen-qing. Near-space wide-swath radar imaging with multiaperture antenna[J]. IEEE Antennas and Wireless Propagation Letters, 2009, 8(1): 461-464.[4] Gebert N, Krieger G, and Moreira A. Digital beamforming on receive: techniques and optimization strategies for high- resolution wide-swath SAR imaging[J]. IEEE Transactions on Aerospace and Electronic Systems, 2009, 45(2): 564-592.[5] Krieger G, Gebert N, and Moreira A. Multidimensional waveform encoding for synthetic aperture radar remote sensing[J]. IEEE Transaction on Geoscience and Remote Sensing, 2008, 46(1): 31-46.[6] Currie A and Brown M A. Wide-swath SAR[J]. IEE Proceedings F-Radar and Signal Processing, 1992, 139(2): 122-135.[7] Younis M, Fischer C, and Wiesbeck W. Digital beamforming in SAR systems[J]. IEEE Transactions on Geoscience and Remote Sensing, 2003, 41(7): 1735-1739.[8] Suess M and Wiesbeck W. Side-looking synthetic aperture radar system[P]. German, EP 1241487, 2002.[9] Younis M, Bordoni F, and Gebert N, et al.Smart multi-aperture radar techniques for spaceborne remote sensing[C]. International Geoscience and Remote Sensing Symposium, Boston, USA, July 2008: III-278-III-281.[10] 李世强. 高分辨率宽测绘带合成孔径雷达系统研究[D]. [博士论文], 中国科学院电子学研究所, 2004.[11] Wu Shi-qing. Development of digital array synthetic aperture radar[C]. Asian-Pacific Conference on Synthetic Aperture Radar Proceedings, Xi'an China, Oct 26-29, 2009: 2-5.[12] Younis M, Huber S, and Patyuchenko A, et al.Digital beam-forming for spaceborne reflector and planar antenna SAR a system performance comparison[C]. International Geoscience and Remote Sensing Symposium, Cape Town, South Africa, July 12-17, 2009, 3: 733-736.[13] Bordoni F, Younis M, and Varona E M, et al.Adaptive scan-on-receive based on spatial spectral estimation for high-resolution, wide-swath synthetic aperture radar[C]. International Geoscience and Remote Sensing Symposium, Cape Town, South Africa, July 12-17, 2009, 1: 64-67.

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