Simulation research to finding direction precision based on music algorithm in non-uniform circular array

For the non-uniform circular antenna array, the algorithm based on multiple signal classification (MUSIC) is a high-resolution estimation algorithm on direction-of-arrival (DOA). This paper analyzes that the direction finding precision of multiple signal classification (MUSIC) algorithm is under the different background signal-to-noise ratio (SNR), multi-path or mirror reflection, and different number of snapshots. At the same time, it simulates that the amplitude and phase inconsistency of super-heterodyne receiver channels effects on the direction finding precision of multiple signal classification (MUSIC) algorithm. The simulation results show that the MUSIC algorithm has higher direction finding precision, and meet the requirements of a direction finding system under certain snapshots and SNR measurement. This paper affords the effective use for a reference on the direction finding based on spatial spectrum estimation.