| 一种低快拍情况下稳健的波束形成算法 |
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| 引用本文： | 李洪涛,贺亚鹏,朱晓华,胡文.一种低快拍情况下稳健的波束形成算法[J].信号处理,2011,27(6). |
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| 作者姓名： | 李洪涛 贺亚鹏 朱晓华 胡文 |
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| 作者单位： | 1. 南京理工大学电子工程与光电技术学院,江苏南京,210094
2. 南京航空航天大学信息科学与技术学院,江苏南京,210016 |
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| 基金项目： | 航空基金(2009ZC52038)；南京理工大学科研启动基金 |
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| 摘 要： | 针对低快拍情况下自适应波束形成器输出方向图存在主峰偏移,副瓣电平较高的问题,该文提出一种低快拍情况下稳健的波束形成算法.算法通过对线性约束最小方差(LCMV)波束形成器的输入信号协方差矩阵进行指数修正,改善了采用协方差矩阵求逆(SMI)算法的LCMV波束形成器输入信号协方差矩阵小特征值在低快拍情况下的发散程度,从而可在减小主峰偏移的同时,有效地解决副瓣电平较高的问题；最后通过分析波束形成器输出信干噪比(SINR)随修正指数变化的情况,给出算法修正指数的取值范围.计算机仿真结果验证了该算法的有效性和优越性.
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| 关 键 词： | 自适应波束形成 低快拍 稳健性 |
A Robust Beamforming Algorithm in the Situation of Limited Snapshots |
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| LI Hong-tao,HE Ya-peng,ZHU Xiao-hua,HU Wen.A Robust Beamforming Algorithm in the Situation of Limited Snapshots[J].Signal Processing,2011,27(6). |
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| Authors: | LI Hong-tao HE Ya-peng ZHU Xiao-hua HU Wen |
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| Affiliation: | LI Hong-tao~1 HE Ya-peng~1 ZHU Xiao-hua~1 HU Wen~2 (1.School of Electronic Engineering and Optoelectronic Technology,Nanjing University of Science & Technology,Nanjing 210094,China,2.College of Information Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China) |
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| Abstract: | To solve the problem of deviation of mainlobe and high sidelobe in the adaptive beamformer in the situation of limited snapshots,this paper presents a robust beamforming algorithm in the situation of limited snapshots.The proposed algorithm amends the exponent of covariance matrix of input signal in the Linearly Constrained Minimum Variance(LCMV) adaptive beamformer which is computed by Sample Matrix Inversion(SMI) algorithm to make the small eigenvalues of the covariance matrix close to each other in the s... |
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| Keywords: | Adaptive Beamforming Limited snapshots Robust |
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