非均匀阵列模糊问题及测向性能分析

在非均匀线阵上应用空间平滑MUSIC算法进行测向。在排除测向模糊的条件下，阵列设置为中心对称阵列。仿真实验对比了非均匀阵列和均匀阵列的测向性能，结果表明在同时存在相干和非相干信源的信号环境下，前者可以有效估计信源的来向，在相同信噪比的条件下具有更好的抗干扰能力和测向分辨力。

Ambiguity and Direction Finding Performance for Non-uniformly Spaced Linear Arrays

We consider the problem of direction-of-arrival estimation in non-uniform sensor arrays base on space smoothing MUSIC technique. To achieving unambiguous DOA estimation, antenna arrays with symmetrical arrangement with respect to its centre are adopted. The direction finding performance of NLA（non-uniform linear array） with that of ULA（uniform linear array） are compared by computer experiments. It is shown that the former one can effectively realize DOA estimation in the presence of coherent and incoherent sources simultaneously. On condition of the same SNR, the former array has better quality of anti-jamming and resolvability.