Direction-of-arrival estimation via exploitation of cyclostationarity for circular array with the combination of interpolation and spatial smoothing

This paper presents a new algorithm for the problem of estimating the directions of arrival (DOA's) of narrow-band signals in the environment of the circular array It combines the spectral correlation theory with interpolating technique and spatial smoothing technique to solve the DOA's estimation problem. The simulation results indicate that it can greatly reduce the effect of background noise and interfering signals, and assure satisfactory performances for coherent signals It also shows the ability of the signal-selective property to discriminate the signals of interest (SOI's) with different spectral correlation properties.