冲击噪声背景下的DOA估计新方法  

A Novel DOA Estimation Method in Impulsive Noise

作　　者：刁鸣[1] 安春莲[1,2] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,哈尔滨150001 [2]西南电子设备研究所,成都610000

出　　处：《北京邮电大学学报》2013年第5期99-104,共6页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(61102106);中央高校基本科研业务费专项基金项目(HEUCF1208;HEUCF100801)

摘　　要：现有冲击噪声背景下的波达方向(DOA)估计方法都是基于分数低阶统计量提出的,其求解比传统的二阶矩方法复杂.为此,根据冲击噪声的幅值特性,通过对阵列接收数据进行去冲击预处理,提出了一种冲击噪声背景下的DOA估计新方法.该方法首先估计出阵列接收数据中信号成分的幅值上限,然后对阵列接收数据进行去冲击处理,从而利用传统的二阶矩方法来实现DOA估计.理论分析和仿真实验结果表明,所提方法无需求解分数低阶统计量,计算简便,估计精度高,且在强冲击噪声环境下仍然具有良好的估计性能.The present direction of arrival （DOA） estimation methods in impulsive noise are mostly based on the fractional lower order statistics, and the computational load is much heavier than the traditional methods based on the second-order moment. Utilizing the property of the impulsive noise, a new DOA es- timation method is proposed. Firstly, the reference amplitude of the array receiving data is estimated, which is not influenced by the impulsive noise. Then, the data with amplitude higher than the reference amplitude is normalized. Finally, the common second-order moment method is exploited to estimate the DOAs. Theoretical analysis and simulation results show that the proposed method has small computational load, and is effective in the presence of strong impulsive noise.

关 键 词：波达方向估计 冲击噪声 多重信号分类算法 二阶矩 分数低阶统计量 

分 类 号：TN911.7[电子电信—通信与信息系统]