Performance of nonuniform sampled signal with MUSIC algorithm

The channel outputs are sampled on nonuniform sampling sets, and an analysis of the sensitivity of MUSIC algorithm with nonuniform sampling (NUS) is investigated. It is demonstrated that it may be capable to select the nonuniform sampled received signal of interesting using MUSIC algorithm. NUS in the time domain is equivalent to construct a virtual nonuniform array through a virtual array transformation, which expands the relative phase difference of the received signal at the different sensors just as that of nonuniform linear array (NLA) arising by the antenna placement. Simulations are conducted to verify that using NUS is beneficial to reduce the system complexity as sampling wide frequency signals at low sampling rate, and greatly improve the DOA estimation performance in lower SNR than using typical uniform sampling with MUSIC algorithm.