均匀圆阵下DOA估计算法研究.pdfVIP

* 均匀圆阵下的DOA 估计算法研究 杨华 邱天爽 （大连理工大学 电子与信息工程学院，辽宁 大连 116023） E-mail：yanghua81924@ 摘要：波达方向估计(DOA)在移动通信中一直具有举足轻重的作用。本文基于第三代移 动通信系统 TD-SCDMA 采用的 8 阵元均匀圆阵智能天线，首先给出一种利用内插阵列变换的 圆阵平移一维 DOA 估计方法，该算法精度较高，并且能够分辨相干信号；接着介绍了 UCA-RB-MUSIC 算法，该算法基于空间模式变换对信号源可进行一维和二维 DOA 估计。通过 仿真实验说明内插阵列变换圆阵平移一维 DOA 估计方法对相干信号源可以有效估计，而 UCA-RB-MUSIC算法则不行；但是 UCA-RB-MUSIC算法可以实现对信号源的二维 DOA估计。 关键词：均匀圆阵；波达方向估计；MUSIC 中图分类号：TN91 Researches on DOA Estimation Algorithms for Uniform Circular Arrays Yang Hua Qiu Tianshuang (School of Electronic and Information Engineering Dalian University of Technology , Liaoning Dalian 116023) E-mail：yanghua81924@ Abstract: Direction of arrival estimation always plays an important part in mobile communications. On the basis of uniform circular arrays (UCA) with 8 sensors adopted by the third-generation telecommunication system TD-SCDMA, this paper introduces a 1-D algorithm which takes advantage of interpolated arrays to realize the shifts of the UCA and get DOA estimations. This algorithm can tell two coherent signals. What’s more, the paper also introduces a 2-D DOA estimation algorithm for UCA, which is based on mode space transformation to get 1-D and 2-D DOA estimation. Simulations show that the algorithm based on interpolated arrays works better than UCA-RB-MUSIC algorithm when the signals are coherent in 1-D DOA estimation; while UCA-RB-MUSIC algorithm can realize effective 2-D DOA estimation instead of the algorithm based on i