| 冲击噪声背景下归一化广义旁瓣相消器 |
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| 引用本文： | 李洪涛,顾陈,朱晓华,胡文.冲击噪声背景下归一化广义旁瓣相消器[J].南京理工大学学报(自然科学版),2011,35(5). |
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| 作者姓名： | 李洪涛 顾陈 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： | 航空科学基金(2009ZC52038); 南京理工大学自主科研专项计划(2010ZYTS082) |
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| 摘 要： | 针对冲击噪声背景下常规波束形成算法性能下降的问题,该文提出一种归一化广义旁瓣相消器(N-GSC)算法,该算法适用于任意未知统计特性的代数拖尾冲击噪声环境。算法通过对输入信号进行无穷范数归一化,使信号的二阶统计量存在且有界,再进行维纳滤波,提高了波束形成在冲击噪声背景下的性能。进行了4种冲击噪声背景下的仿真实验。仿真结果表明,与传统的GSC算法和基于分数低阶矩的GSC算法相比,N-GSC算法计算简单,无需噪声特征指数的先验信息或估计,适用于任意分布的冲击噪声环境,具有更强的干扰抑制能力。
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| 关 键 词： | 阵列信号处理 广义旁瓣相消器 分数低阶矩 冲击噪声 |
Normalized-generalized Sidelobe Canceller in Impulsive Noise |
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| LI Hong-tao,GU Chen,ZHU Xiao-hua,HU Wen.Normalized-generalized Sidelobe Canceller in Impulsive Noise[J].Journal of Nanjing University of Science and Technology(Nature Science),2011,35(5). |
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| Authors: | LI Hong-tao GU Chen ZHU Xiao-hua HU Wen |
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| Institution: | LI Hong-tao1,GU Chen1,ZHU Xiao-hua1,HU Wen2(1.School of Electronic Engineering and Optoelectronic Technology,NUST,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 performance degradation of a beamformer in impulsive noises,a new normalized-generalized sidelobe canceller(N-GSC)algorithm is presented for the heavy-tailed impulsive noises of arbitrary unknown statistics.The second-order statistical entity of input signal is made exist and finite by infinity-norm normalizing the input signal,and the input signal is filtered by wiener filter to improve the performance of the beamformer amid heavy-tailed impulsive noise of unknown statistics.The simulation res... |
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| Keywords: | array signal processing generalized sidelobe cancellers fractional lower order moments impulsive noises |
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