On Hermitian Mapping for Direction-of-Arrival Estimation of Coherent Cyclostationary Signals

By constructing the cyclic autocorrelation matrix with Hermitian property, a Hermitian mapping method (HMM) is proposed which is appropriate for both cyclic MUSIC and conjugate cyclic MUSIC in this paper. By exploiting the cyclostationarity of the signals of interest (SOIs), this approach not only allows to select uncorrelated desired signals ,but also has a better performance in the presence of multipath propagation.Theoretical analysis is presented and shows that the Hermitian mapping method achieves a larger effective aperture of the array. Finally, simulation results show the effectiveness of the proposed method.