Direction-of-arrival estimation of cyclostationary coherent signals in array processing

A new approach is proposed for estimating the direction-of-arrival (DOA) of the cyclostationary coherent signals impinging on a uniform linear array (ULA) by utilizing the spatial smoothing (SS) technique. In order to improve the robustness of the DOA estimation by exploiting the cyclic statistical information sufficiently and handling the coherence effectively, we give a cyclic algorithm with multiple lag parameters and the optimal subarray size. The performance is verified and compared with the conventional methods through numerical examples.