改进的Root-MUSIC算法的DoA估计  

Do A Estimation of Modified Root-MUSIC Algorithm

作　　者：王新贺[1] 周围[1,2] 

机构地区：[1]重庆邮电大学移动通信技术重庆市重点实验室,重庆400065 [2]重庆邮电大学光电工程学院,重庆400065

出　　处：《通信技术》2015年第12期1354-1357,共4页Communications Technology

基　　金：国家高技术研究发展计划(863计划)重点项目(No.2009AA011302);重庆邮电大学研究生教育创新计划重点项目(No.Y201019);重庆市教委科研项目(No.KJ090513);重庆市科委重点实验室专项经费~~

摘　　要：快速求根多重信号分类(Root-Multiple Signal Classification,Root-MUSIC)算法是利用信号源个数构建多项式,估计信源的波达方向(Direction of Arrival,Do A),有阵列孔径的损失。为了提高快速算法的Do A估计性能,提出了改进的Root-MUSIC算法。改进算法利用阵元个数构建多项式,没有阵列孔径的损失,提高了Do A估计性能。通过对快速算法与改进算法的仿真分析可以证实,改进算法在估计成功率和均方根误差等方面的性能都要远远的优于快速算法。虽然改进算法在复杂度上稍高于快速算法,但是其总的复杂度并不高,改进算法更适于应用。Fast Root-MUSIC （ Root-Multiple Signal Classification, Root-MUSIC） algorithm, through the number of signals source, constructs the polynomial and estimates the DoA （ Direction of Arrival ） , and however, this algorithm has the loss of array aperture. In order to improve the performance of DoA estima- tion, a modified Root-MUSIC algorithm is proposed. This modified algorithm utilizes the number of array elements to construct polynomial and has no loss of array aperture, thus improving DoA estimation perform- ance. Simulation and analysis on fast algorithm and modified algorithm indicate that the latter is clearly su- perior to the former in success rates of estimation and RMSE （Root-Mean-Square Error）. This modified algorithm, although slightly higher than the fast algorithm in complexity, is acceptable for its the overall complexity and thus more suitable for application.

关 键 词：波达方向估计 快速算法 估计性能 复杂度 

分 类 号：TN929.5[电子电信—通信与信息系统]