基于改进ESPRIT算法的波达方向估计  

DOA Estimation Based on Modified ESPRIT Algorithm

作　　者：云彩霞[1] 李珊[1] 白彦霞[1] 

机构地区：[1]北京化工大学北方学院,河北廊坊065201

出　　处：《现代电子技术》2010年第1期61-63,68,共4页Modern Electronics Technique

摘　　要：把经典的波达方向估计算法应用于均匀圆阵智能天线是一个重要的研究课题。通过预处理技术把均匀圆阵转换成虚拟均匀线阵,为了解决噪声造成信号子空间的扰动问题,提出了两种总体最小二乘ESPRIT(TLS-ESPRIT);为把ES-PRIT算法应用于均匀圆阵,引入了模式空间的ESPRIT算法。通过建立恰当的数学模型,对上述各算法的均匀线阵和均匀圆阵上的性能进行仿真和对比分析。仿真结果证明,两种改进的算法性能均好于基本的ESPRIT算法。Applying classical algorithms of DOA estimation to UCA is an important research item. In order to apply spatial smoothing techniques to UCA,convert the array manifold form UCA to virtual ULA by pretreatment techniques. For solving the fluctuation of signal subspace caused by noise, two kinds of TLS- ESPRIT are proposed, then the mode- space algorithms of UCA are introduced. Based on proper mathematic model, the performance of those algorithms is simulated and compared. The simulation results verify that these two kinds of modified algorithms can get better performance then rudimentary ESPRIT.

关 键 词：波达方向估计 TLS—ESPRIT 均匀圆阵 智能天线 

分 类 号：TN911.25[电子电信—通信与信息系统]