Azimuth and elevation estimation for multipath signals exploiting cyclostationarity and temporal smoothing technology

The two-dimensional (2-D) multipath direction of arrival (DOA) estimation algorithm using a planar array is provided exploiting higher order cyclostationarity (HOCS) and temporal smoothing technology. Based on real mobile communication channel characteristics, in which the multipath reflection coefficient changes more rapidly than their DOAs, the temporal smoothing is applied to resolve 2-D DOAs of coherent signals. Compared with all the previous multipath azimuth/elevation angle estimation methods, the proposed method achieves further array aperture extension, as well as its powerful capability of noise-suppression and signal-selectivity due to the use of HOCS.