米波雷达仰角和多径衰减系数联合估计算法

刘俊; 刘峥; 刘韵佛

doi:10.3724/SP.J.1146.2010.00251

米波雷达仰角和多径衰减系数联合估计算法

doi: 10.3724/SP.J.1146.2010.00251

基金项目:

长江学者和创新团队发展计划(IRT0645)和国家自然科学基金(60901068)资助课题

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出版历程
- 收稿日期: 2010-03-18
- 修回日期: 2010-08-23
- 刊出日期: 2011-01-19

Elevation Angle and Multipath Fading Coefficient Joint Estimation Algorithm in VHF Radar

摘要

摘要: 针对多径信号严重影响米波雷达低仰角测高的问题，基于广义MUSIC算法的思想，提出了一种可同时估计目标仰角和多径衰减系数的新算法。该算法利用阵列协方差矩阵和搜索角度计算出虚拟的多径衰减系数，然后将该系数与搜索角度一起构造子空间，当该子空间与噪声子空间正交时，即可获得波达方向角度，对应的系数即为多径反射波相对于直达波的多径衰减系数。该算法在克服多径效应的同时，不损失阵列孔径，不要求阵列具有特殊的结构。理论分析和仿真结果表明了该算法的优越性。
- 米波雷达 /
- 测高 /
- 波达方向 /
- 多径 /
- 衰减系数
Abstract: Based on general MUSIC algorithm, an elevation angle and multipath fading coefficient of the target joint estimation algorithm is proposed in VHF multipath environment. In this algorithm, a virtual multipath fading coefficient is derived from the array covariance matrix and search angles, then a subspace is formed by this coefficient and search angles. When this subspace is orthogonal to the noise subspace, DOA angles are achieved. Simultaneously, the corresponding coefficient is multipath fading coefficient. While overcoming multipath effects to elevation angle measurement, this method retains antenna aperture, and does not require a special antenna array configuration. Theoretical analysis and computer simulation results demonstrate the merits of the new algorithm.
- VHF radar /
- Altitude measurement /
- Direction-Of-Arrival (DOA) /
- Multipath /
- Fading coefficient

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吴向东, 张守宏, 董玫. 一种基于线性预处理的米波雷达低仰角处理算法[J]. 电子学报, 2006, 34(9): 1668-1671.Wu Xiang-dong, Zhang Shou-hong, and Dong Mei. An algorithm based on linear preprocessing for meter-wave radar to a target at low altitude[J]. Acta Electronica Sinica, 2006, 34(9): 1668-1671.[2]Ziskind I and Wax M. Maximum likelihood localization of multiple sources by alternating projection[J].IEEE Transaction on Acoustics, Speech, and Signal Processing.1988, 36(10):1553-1560[3]赵永波, 张守宏. 雷达低角跟踪环境下的最大似然波达方向估计方法[J]. 电子学报, 2004, 32(9): 1520-1523.Zhao Yong-bo and Zhang Shou-hong. Maximum likelihood DOA estimation in radar low-angle tracking environment[J]. Acta Electronica Sinica, 2004, 32(9): 1520-1523.[4]Zoltowski M and Haber F. A vector space approach to direction finding in a coherent multipath environment[J].IEEE Transaction on Antennas and Propagation.1986, 34(9):1069-1079[5]张文俊, 赵永波, 张守宏. 广义MUSIC 算法在米波雷达测高中的应用及其改进[J].电子与信息学报.2007, 29(2):387-390浏览[6]Zhang Wen-jun, Zhao Yong-bo, and Zhang Shou-hong. Altitude measurement of meter-wave radar using the general[7]MUSIC algorithm and its improvement[J]. Journal of[8]Electronics Information Technology, 2007, 29(2): 387-390.[9]Lo T and Litva J. Use of a highly deterministic multipath signal model in low-angle tracking[J]. IEE Proceedings-F, 1991, 138(2): 163-171.[10]胡晓琴, 陈建文, 王永良. 米波雷达测高多径模型研究[J]. 电波科学学报, 2008, 23(4): 651-657.Hu Xiao-qin, Chen Jian-wen, and Wang Yong-liang. Research on meter-wave radar height-finding multipath model[J]. Chinese Journal of Radio Science, 2008, 23(4): 651-657.[11]Zhang Yu-feng, Ye Zhong-fu, and Liu Chao. Estimation of fading coefficients in the present of multipath propagation[J]. IEEE Transaction on Antennas and Propagation, 2009, 57(7): 2220-2224.[12]赵光辉, 陈伯孝, 董玫. 基于交替投影的DOA估计方法及其在米波雷达中的应用[J].电子与信息学报.2008, 30(1):224-227浏览Zhao Guang-hui, Chen Bai-xiao, and Dong Mei. A new DOA estimator based on alternating projection and its application in VHF radar[J].Journal of Electronics Information Technology.2008, 30(1):224-227[13]Shan T J, Wax M, and Kailath T. On spatial smoothing for direction-of-arrival estimation of coherent signals[J].IEEE Transaction on Acoustics, Speech, and Signal Processing.1985, 33(4):806-811[14]董玫, 赵永波, 张守宏, 等. 倾斜面阵下的米波雷达测高方法[J]. 西安电子科技大学学报, 2009, 36(1): 43-47.Dong Mei, Zhao Yong-bo, and Zhang Shou-hong. Method for altitude measurement in the VHF radar under the oblique planar array[J]. Journal of Xidian University, 2009, 36(1): 43-47.

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