信源数目过估计下相干信号的修正MUSIC算法分析

Performance Analysis of the Modified MUSIC Algorithm Under the Over Estimation of Source Number for Coherent Signal

在简要介绍阵列信号处理中广泛采用的MUSIC算法的基础上,分析了信源数目过估计情况下的MUSIC算法测向性能,针对信源数目过估计下MUSIC谱会出现虚假信号的问题,提出了一种适合于相干信号的改进MUSIC算法,仿真结果证实了改进算法的可行性和有效性。

On the base of introducing basic principles of MUSIC algorithm, which is widely applied in array signal processing , the performance of MUSIC algorithm with source number over estimated is analyzed in this paper. Simulation results show that some false peaks appear in MUSIC spectrum when the source number is over estimated. Then a modified MUSIC algorithm which has good performance for coherent signal is discussed. Computer simulation results confirms the modified algorithm availability and effectiveness.