摘要
针对将FFT算法用于空域信号处理中存在受空间阵元数的限制,分辨率不高,无法识别相距较近的两个目标的问题,对等距线阵的DoA估计算法进行了研究,提出了基于空间分割的快速MUSIC算法。此算法在FFT算法粗略估计的若干局域子空间内进行谱峰搜索,可大大减小MUSIC算法全空间谱峰搜索的计算量。在单一期望信号的情况下,提出了基于最小二范数的快速DoA估计算法,它可进一步减小计算量。仿真结果证明了对DoA估计的快速算法理论分析的正确性和算法的有效性。
The FFT algorithm is used in space signal processing and the rapid DoA estimation algorithms are studied,then a rapid MUSIC algorithm based on space partition is proposed. The new algorithm searches the spectral peak in several local subspaces based on approximate estimation of DoA with FFT algorithm. It can greatly reduce the computational complexity of MUSIC algorithm. Under condition of a single expected signal,a rapid DoA estimation algorithm based on mininorm is proposed,which can further reduce the computational complexity. Simulation results verify the theoretical analysis of rapid DoA estimation algorithms and demonstrate the effectiveness of the algorithms.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2004年第10期1364-1366,1425,共4页
Systems Engineering and Electronics
基金
空军装备部科研项目资助课题(KJ02132)
