基于FFT与MUSIC的改进DOA估计算法  

Improved Algorithm of DOA Based on FFT and MUSIC

作　　者：计征宇[1] 杨向华[1] 

机构地区：[1]中国工程物理研究院电子工程研究所,绵阳621900

出　　处：《系统仿真学报》2010年第2期487-490,共4页Journal of System Simulation

摘　　要：针对MUSIC算法在进行信号波达方向(DOA)估计时谱峰搜索运算量大的问题,提出了一种基于FFT多波束算法与MUSIC算法的联合DOA估计方法。该方法采用FFT多波束算法形成多个波束,近似估计信号DOA,获得对应波束指向,再利用MUSIC算法实现对信号DOA的精确估计。这样就只需在该波束指向对应的空域范围内搜索,减小了DOA估计的运算量。In order to reduce the computational complexity in searching the peak, an improved algorithm of DOA estimation based on FFT algorithm and MUSIC algorithm was proposed. Firstly, it uses FFT algorithm to form multi-beam, and get a rough estimation of DOA. Then it uses MUSIC algorithm to get an accuracy estimation of DOA. With this method, searching of the peak is worked in small angle range, and the computational complexity is reduced.

关 键 词：DOA FFT MUSIC 数字多波束 

分 类 号：TN95[电子电信—信号与信息处理]