基于Schur-Hadamard积波束域传播因子的分布式信源参数联合估计  

Beamspace Propagator Method Based on Schur-Hadamard Product for Joint Parameter Estimation of Coherently Distributed Source

作　　者：韩英华[1] 汪晋宽[1] 宋昕[1] 张艳凤[2] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110004 [2]沈阳农业大学高等职业技术学院,辽宁沈阳110122

出　　处：《信号处理》2008年第4期534-537,共4页Journal of Signal Processing

基　　金：教育部博士点基金(20050145019)

摘　　要：针对分布式信源阵元域参数估计算法在低信噪比时性能下降、计算量大的问题,提出了基于Schur-Hadamard积波束域传播因子的分布式信源参数联合估计算法。根据角度信号密度对称的约束条件,将分布式信源方向向量化简为点信源方向向量与实矩阵的Schur-Hadamard积,使其两个子矩阵满足传播因子的线性变换,进而将波束域传播因子方法用于分布式信源参数联合估计,降低了计算量。仿真实验验证了所提算法的有效性,与阵元域DSPE算法相比,基于Schur-Had- amard积的波束域传播因子算法具有更好的信噪比性能。In an effect to tackle the problem of the performance deteriorates at low SNR and the high computational complexity induced by sensor array processing, beamspace propagator method based on Schur-Hadamard product for joint parameter estimation of coherently distributed source is proposed. According to the symmetry assumption of angular signal intensity, the steering vector is expressed as Schur-Hadamard product by the point source steering vector and a real matrix. And then the partition of the steering vector of the distributed source can be deduced as linear operator of the propagator. So beamspace propagator method is proposed to estimate the parameters jointly with reduced complexity cost. Specifically,it is shown from simulation resuhs that the proposed algorithm has better SNR performance compared with DSPE algorithm.

关 键 词：相干分布式信源 中心波达方向 角度扩散 波束域 传播因子 

分 类 号：TN911.72[电子电信—通信与信息系统] O151.21[电子电信—信息与通信工程]