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虚拟阵列下的相干信号测向算法 预览 被引量:5

Direction finding algorithm for coherent signals by virtual array
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摘要 大多数解相干测向算法只能应用于均匀线阵,而不能用于均匀圆阵。针对这一问题提出了一种基于虚拟均匀线阵的快速解相干波达方向估计算法,该算法对均匀圆形阵列的输出信号进行模式激励,使其成为虚拟均匀线阵,在色噪声协方差矩阵为复对称Toeplitz结构的情况下,利用空间差分方法和矩阵重构相结合来估计相干信号,并且去除非相干信号以及色噪声。该算法提高了阵列的信源过载能力,不需要进行高阶累积量的计算以及特征分解,计算机仿真结果证明了算法的有效性。 Most of direction finding algorithms for decoherence can only be applied to uniform linear array but cannot be used for uniform circular array(UCA). A fast direction of arrival(DOA) estimation method for decoherence based on virtual uniform linear array(ULA) is proposed to this problem, the mode excitation meth od is used to transform the UCA in element space into a virtual ULA in mode space, the algorithm is presented to cope with the coherent sources under a condition of the colored noise covariance matrix with Toeplitz struc-ture, it employs a method combining spatial differencing and matrix restructure to eliminate the uncorrelated sources and colored noise. The number of signals resolved by this approach can exceed the number of array ele ments,moreover, it does not need to compute the higher order statistics and eigen decomposition. Computer simulation indicates that the method is effective.
作者 甄佳奇 丁群 赵冰 ZHEN Jia-qi, DING Qun, ZHAO Bing (College of Electronic Engineering, Heilongjiang University, Harbin 150080, China)
出处 《系统工程与电子技术》 EI CSCD 北大核心 2013年第10期2032-2036,共5页 Systems Engineering and Electronics
基金 黑龙江省教育厅科研项目(12523026) 黑龙江大学青年科学基金(QL201114)资助课题
关键词 信息处理技术 波达方向估计 虚拟阵列 空间差分 传播算子 information processing technology direction of arrival(DOA) estimation virtual array spatialdifference propagator
作者简介 甄佳奇(1981-),男,讲师,博士,主要研究方向为阵列信号处理、保密通信。E—mail:zhenjiaqi2011@163.com 丁群(1957-),女,教授,博士,主要研究方向为保密通信、信号处理。E—mail:qunding@yahoo.cn 赵冰(1981-),女,讲师,博士,主要研究方向为扩频通信。E—mail:87715460@qq.com
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