基于实值分解技术的循环root-MUSIC算法  

Cyclic root-MUSIC Based on Real-valued Decomposition

作　　者：刘志刚[1] 汪晋宽[1] 王福利[1] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110004

出　　处：《系统仿真学报》2006年第9期2438-2441,共4页Journal of System Simulation

基　　金：教育部博士点基金资助项目(20050145019);河北省教育厅科学研究指导计划项目(Z2004103)

摘　　要：通过构造了循环自相关矩阵的数据模型,使其具有厄尔米特特性,提出了一种基于实值分解技术的循环root-MUSIC算法,无需空间谱搜索,较好地解决了多径传播环境中信号高度相关问题,极大地降低了计算量。实值循环root-MUSIC算法的均方误差公式的理论推导,证明了该算法既适合独立信号,又适合高度相关信号或者相干信号。仿真实验结果证明,与循环root-MUSIC算法相比,该算法适应多径传播环境,具有计算量小和性能好等特点。Using real-valued decomposition technique, Unitary Cyclic root-MUSIC algorithm without spectral search was proposed for multipath environment of mobile communication, by reconstructing the data model of the cyclic covariance matrix with Hermitian property, which has a better performance in the presence of multipath propagation and substantially reduces the computational complexity. The derivation of the mean square error（MSE） shows that this approach not only accurately estimates direction of arrivals （DOAs） of uncorrelated sources, but also allows to seperate highly correlated or coherent signals. Finally, the simulation results, compared with Cyclic root-MUSIC algorithm, adapt to multipath environment and have features of better performance and low computational complexity.

关 键 词：波达方向 循环平稳 阵列信号处理 多径传播 移动通信 

分 类 号：TN911.7[电子电信—通信与信息系统]