吉林大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (4): 1344-1353.doi: 10.13229/j.cnki.jdxbgxb201604047
张乐乐, 陈殿仁, 赵爽
ZHANG Le-le, CHEN Dian-ren, ZHAO Shuang
摘要: 为解决图像模糊和图像混叠的问题,提出了将混合相控阵MIMO雷达与SAR相结合(混合相控阵MIMO SAR)的多方向测绘带成像方法,且提出二维数字波束合成(DBF)处理技术以实现无模糊宽测绘带高分辨率成像。首先建立该方法信号模型,推导了混合相控阵MIMO SAR的实际控制矩阵。然后针对多方向成像易造成图像混叠和距离模糊的不足,提出俯仰向自适应DBF算法,实现了图像混叠部分的有效分离且对模糊有很好的抑制。最后利用方位向加权对带外模糊置零。仿真结果表明该二维DBF处理技术的有效性。与星载双向和相控阵多向成像方法相比,该方法工作方式更灵活,能够满足多功能星载SAR的要求。
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[1] Gebert N, Krieger G, Moreira A. Multichannel azimuth processing in ScanSAR and TOPS mode operation[J]. IEEE Transactions on Geoscience and Remote Sensing, 2010, 48(7):2994-3008. [2] Gao Can-guan,Wang R,Deng Yun-kai, et al. Large-scene sliding spotlight SAR using multiple channels in azimuth[J]. IEEE Geoscience and Remote Sensing Letters, 2013, 10(5):1006-1010. [3] Henke D, Magnard C, Frioud M, et al. Moving-target tracking in single-channel wide-beam SAR[J]. IEEE Transactions on Geoscience and Remote Sensing, 2012, 50(11):4735-4747. [4] Wollstadt S, Prats-Iraola P, Lopez-Dekker P, et al. Bidirectional SAR imaging mode[J]. IEEE Transactions on Geoscience and Remote Sensing, 2013, 51(1):601-614. [5] Ender J H G, Brenner A R. PAMIR—a wideband phased array SAR/MTI system[J]. IEE Proceedings Radar, Sonar and Navigation, 2003, 150(3):165-172. [6] Wang Wen-qin. MIMO SAR OFDM chirp waveform diversity design with random matrix modulation[J]. IEEE Transactions on Geoscience and Remote Sensing, 2015, 53(3):1615-1625. [7] Kim J H, Younis M, Prats-Iraola P,et al. First spaceborne demonstration of digital beamforming for azimuth ambiguity suppression[J]. IEEE Transactions on Geoscience and Remote Sensing, 2013, 51(1):1-11. [8] Krieger G, Gebert N, Moreira A. Multidimensional waveform encoding: a new digital beamforming technique for synthetic aperture radar remote sensing[J]. IEEE Transactions on Geoscience and Remote Sensing, 2008, 46(1):31-46. [9] Feng Fan, Li Shi-qiang, Yu Wei-dong,et al. Study on the processing scheme for space-time waveform encoding SAR system based on two-dimensional digital beamforming[J]. IEEE Transactions on Geoscience and Remote Sensing, 2012, 50 (3):910-932. [10] Hassanien A, Vorobyov S A. Phased-MIMO radar: a tradeoff between phased-array and MIMO radars[J]. IEEE Transactions on Signal Processing, 2010, 58(6):1-33. [11] Fuhrmann D R, Browning J P, Rangaswamy Muralidhar. Signaling strategies for the hybrid MIMO phased-array radar[J]. IEEE Journal of Selected Topics in Signal Processing, 2010, 4(1):66-78. [12] Hua G, Abeysekera S S. Receiver design for range and doppler sidelobe suppression using MIMO and phased-array radar[J]. IEEE Transactions on Signal Processing, 2013, 61(6):1315-1326. [13] Wang Wen-qin, Shao Huai-zong. A flexible phased-MIMO array antenna with transmit beamforming[J]. International Journal of Antennas and Propagation, 2012, 10(6):473-475. [14] Krieger G, Gebert N, Moreira A. Unambiguous SAR signal reconstruction from nonuniform displaced phase center sampling[J]. IEEE Geoscience and Remote Sensing Letters, 2004, 1(4):260-264. [15] Wang Wen-qin. High altitude platform multichannel SAR for wide-area and staring imaging[J]. IEEE A&E Systems Magazine, 2014, 29(5):12-17. [16] 冯帆,李世强,禹卫东. 一种多维编码全极化SAR回波分离改进方法[J]. 电子与信息学报,2012,34(1):172-178. Feng Fan, Li Shi-qiang, Yu Wei-dong. An improved approach to separating echoes in multidimensional waveform encoding fully-polarimetric SAR[J]. Journal of Electronics&Information Technology,2012,34(1):172-178. [17] Kou Guang-jie, Wang Zhen-song, Yao Ping. Multiple beams spaceborne SAR imaging[J]. IEEE Transactions on Aerospace and Electronic Systems, 2012, 48(4):3363-3375. [18] Tseng C Y, Griffiths L J. A unified approach to the design of linear constraints in minimum variance adaptive beamformers[J]. IEEE Transactions on Antennas and Propagation, 1992, 40(12):1533-1542. [19] Carlson B D. Covariance matrix estimation errors and diagonal loading in adaptive arrays[J]. IEEE Transactions on Aerospace and Electronic Systems, 1988, 24(4):397-401. |
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