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A self-calibration algorithm for cross array in the presence of mutual coupling

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Science China(Information Sciences) 2011年第4期54卷 836-848页

作者： HU XiaoQin 1,2,CHEN Hui 2,WANG YongLiang 2 & CHEN JianWen 2 1 College of Electronic Science and Engineering,National University of Defense Technology,Changsha 410073,China 2 Key Lab of wuhan radar academy,wuhan 430019,China College of Electronic Science and Engineering National University of Defense Technology Changsha China Key Lab of wuhan radar academy Wuhan China

In this paper,a novel blind mutual coupling self-calibration algorithm especially tailored to cross array is *** method compensates for the mutual coupling not only between sensors in each subarray but also between two *** the property of coupling matrix,the proposed method requires neither the calibration sources in known locations nor the multidimensional nonlinear *** method can jointly estimate the DOAs of the incoming signals and the unknown mutual coupling coefficients,and has high estimation precision and low computational *** analysis and computer simulations show the effectiveness of the proposed algorithm.

关键词： cross array mutual coupling self-calibration DOA estimation

Ship Wakes Detection in SAR Images Based on the Joint Radon Transform and Entropy

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Ship Wakes Detection in SAR Images Based on the Joint Radon ...

2006 CIE International Conference on radar

作者： Pengfei Du Ziyue Tang Yongliang Wang Yongjian Sun wuhan radar academy wuhan 430029 China

In order to distinguish true ship wakes from other spurious linear feature effectively,a novel method of ship wakes detection based on the Radon transform （RT） and on the entropy,and named joint Radon and entropy detection algorithm （JRE） is *** proposed approach extracts all possible peaks in Radon transform space with a low threshold,then computes the entropies centering around each peak and identifies the true ship wakes from spurious ***,the method can increase the detection probability and reduce the false alarm *** analysis and experimental results show that the method is capable of detecting synthetic aperture radar （SAR） ship wakes precisely and reliably in the presence of both strong noise and sea clutter.

关键词： SAR images ship wakes Radon transform entropy

Robust Adaptive Beamforming Based on Penalty Function Under Steering Vector Errors

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Robust Adaptive Beamforming Based on Penalty Function Under ...

2002年第6届信号处理国际会议

作者： Li Rongfeng Wang Yongliang Wan Shanhu Key Research Lab wuhan radar academy wuhan 430010 China

＜正＞ The presence of random steering vector errors degrades severely the performance of adaptive beamforming, and results in adapted beam patterns with high sidelobes and distorted mainbeams. In this paper, the penalty function is exploited to prevent signal cancellation and remedy beam distortion due to steering vector errors. Computer simulation results are presented for illustration.

关键词： Adaptive array Penalty function Adapted beam pattern

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空间谱估计算法结构及仿真分析

系统工程与电子技术 2001年第8期23卷 76-79页

作者：陈辉王永良武汉雷达学院兵器运用工程重点实验室 430010

在对高分辨空间谱估计算法研究的基础上 ,提出了空间谱估计算法的基本结构 ,这种结构包含两个组成部分 :预处理算法和波达方向估计 (DirectionofArrival,DOA)算法。同时对多种预处理算法和DOA估计算法进行了分类说明。最后通过大量的计... 详细信息

在对高分辨空间谱估计算法研究的基础上 ,提出了空间谱估计算法的基本结构 ,这种结构包含两个组成部分 :预处理算法和波达方向估计 (DirectionofArrival,DOA)算法。同时对多种预处理算法和DOA估计算法进行了分类说明。最后通过大量的计算机仿真实验比较了各种算法的性能。

关键词：空间普估计信号处理算法信号估计

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The Extended Chirp Scaling Algorithm for Bistatic SAR Imaging

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The Extended Chirp Scaling Algorithm for Bistatic SAR Imagin...

2006 CIE International Conference on radar

作者： Wang Feng Tang Ziyue Sun Yongjian Department of Information & Command Automation wuhan radar academy wuhan 430029 China

Based on the echo model of Bistatic SAR and range equation in RD domains,an ECS （Extended Chirp Scaling） algorithm derived from the ECS algorithm of monostatic SAR was proposed for squint mode Bistatic SAR ***,two key problems of this algorithm,Doppler ambiguity and imaging position in range direction,was *** last the ECS algorithm advanced in this paper is proved to be valid by the simulation results.

关键词： Bistatic synthetic aperture radar Extended Chirp Scaling algorithm Doppler Ambiguity Squint mode

Modeling and Suppression of Clutter for Airborne Fire Control radar with Conformal Antennas Array

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Modeling and Suppression of Clutter for Airborne Fire Contro...

2011 CIE International Conference on radar(radar 2011)

作者： K.Q.Duan W.C.Xie Y.L.Wang Key Research Lab. wuhan radar academy wuhan 430019 China

Conformal antennas array （CAA） offer many advantages over conventional planar antennas array （PAA） such as less payload weight, larger effective aperture and increased field of view without mechanically canting or rotating the array. In this paper, airborne fire control radar （AFCR） with CAA is analyzed in terms of antennas modeling, working mechanism, subarray synthesis, clutter characteristics and clutter suppression method, etc. Firstly, the mathematics model and geometry configuration of AFCR with CAA are given, and the manners of subarray division and working are obtained based on the requirement for moved target detection of AFCR, and the pattern properties of CAA are analyzed. Secondly, the clutter spectrum distribution in space-time plane is analyzed. Finally, clutter suppression performance of existing space- time adaptive processing （STAP） techniques for practice is compared, and the minimum detectable velocity of AFCR with CAA is shown.

关键词： Airborne fire control radar Conformal antennas array Space-time adaptive processing Clutter suppression

radar Weak Target Detection and Location Based on Hough Transform

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Radar Weak Target Detection and Location Based on Hough Tran...

2002年第6届信号处理国际会议

作者： Du Pengfei Wang Yongliang Sun Wenfeng School of Electronic Science and Engineering National University of Defence Technology Changsha Hunan 410073 China Key Research Lab wuhan radar academy wuhan Hubei 430010 China

＜正＞ The Hough transform （HT） is analyzed and applied to radar weak target detection and location in this paper. The literature [1], in which only search radar is used, is extended to more general radar system. The theoretical analysis and experimental results used real-life radar data show that the presented method performs well in the strong clutter background, and robust to the clutter distribution.

关键词： Hough transform (HT) Weak target detection and location

L型阵列通道不一致及阵元位置误差的联合校正方法

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数据采集与处理 2009年第B10期24卷 150-154页

作者：胡晓琴王永良陈建文陈辉国防科技大学电子科学与工程学院长沙410073 武汉空军雷达学院重点实验室武汉430019

针对L型阵列中通道不一致和阵元位置误差同时存在的情况,利用辅助阵列和校正源,提出一种L型阵列通道不一致和阵元位置误差的解耦合估计方法。该方法计算量小,不需要误差参数的任何先验知识,且校正源的位置可以未知。理论分析和仿真结果... 详细信息

针对L型阵列中通道不一致和阵元位置误差同时存在的情况,利用辅助阵列和校正源,提出一种L型阵列通道不一致和阵元位置误差的解耦合估计方法。该方法计算量小,不需要误差参数的任何先验知识,且校正源的位置可以未知。理论分析和仿真结果表明,提出的方法能很好地解决L型阵列中通道不一致和阵元位置误差的联合校正问题,且两种误差的估计精度高。

关键词： L型阵列通道不一致位置误差误差校正

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Meteor radar observation of circulation near mesopause over wuhan

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Chinese Science Bulletin 2003年第15期48卷 1634-1638页

作者： XIONG Jiangang, WAN Weixin, NING Baiqi & LIU Libo wuhan Institute of Physics and Mathematics, Chinese academy of Sciences, wuhan 430071, China Correspondence should be addressed to Xiong Jiangang (e-mail: xjg@***) wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430071 China

The wuhan meteor radar is the first all-sky meteor radar in China. The circulation near the mesopause from February to September 2002 is studied based on the data obtained by the wuhan meteor radar. The zonal wind is usually eastward in winter from 80 to 100 km. The mean zonal wind become westward from March to early of May, when the winter circulation reverses to the summer circulation. But at the meteor heights, the zonal circulation usually becomes eastward after the middle of May. The meridional circulation is always equatorward. The peaks of the meridional wind move downward with the height, and the peak value reaches its maximum of 21 ms-1 in July. Having made a comparison between monthly mean wind and HWM93 model wind, the value of southward wind, the maximal value of eastward wind as well as the reversal height of zonal wind are found to be quite different from each other.

关键词：武汉市气象雷达带状气流数据采集中间层顶

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