| 一种冲击噪声环境下的最优波束形成算法 |
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| 引用本文： | 刘枫,李杨,王文昌.一种冲击噪声环境下的最优波束形成算法[J].电子信息对抗技术,2011,26(3):42-46. |
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| 作者姓名： | 刘枫 李杨 王文昌 |
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| 作者单位： | 电子信息控制重点实验室;海思半导体有限责任公司成都分公司; |
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| 摘 要： | 针对冲击噪声（包括所有对称α稳定分布噪声）环境下一般未知噪声统计特性,提出了一种最小几何功率无失真响应波束形成算法。该算法利用求取有限对数矩时无需噪声统计特性的特点,用对数矩代替二阶矩在约束期望信号增益为1的条件下使快拍信号的几何功率最小,最终使输出信号能达到更高的几何信干噪比。并通过一种新的迭代的方法得到最优权向量。仿真实验证明了该算法的有效性。
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| 关 键 词： | 阵列信号处理 波束形成 几何功率 冲击噪声 对数矩 |
An Optimum Beamforming Algorithm Against Heavy-Tailed Noise of Unknown Statistics |
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| Authors: | LIU Feng Li Yang WANG Wen-chang |
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| Institution: | LIU Feng1,Li Yang1,WANG Wen-chang2(1.Science and Technology on Electronic Information Control Laboratory,Chengdu 610036,China,2.Hisilion Techologies Co.Ltd Chengdu,Chengdu 610041,China ) |
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| Abstract: | A minimum geometric power distortionless response beamforming approach against impulsive noise(including all α-stable noise) of unknown statistics is proposed.Due to that definite logarithmic moments require no priori knowledge of impulsive noise,this new beamformer substitutes the logarithmic moments for the second-order moments and iteratively minimizes the "geometric power"of the beamformer’s output snapshots,subject to a linear constraint.Therefore,the proposed beamformer can provide significantly higher output geometric signal-to-noise-and-interference ratio(G-SINR).Moreover,the optimum weight vector is obtained by using a new iteration process.The simulation results prove that the new method is effective. |
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| Keywords: | array signal processing beamforming geometric power impulsive noise logarithmic moments |
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