2-D DOA estimating method of coherent wideband signals based on uniform circular array

An azimuth and elevation 2-D direction of arrival(DOA) estimating method of coherent wideband signals is proposed.The signal subspace of each frequency point in bandwidth is focused by the coherent signal subspace approach.Then a mathematical model based on a uniform circular array is established to estimate 2-D direction of arrival.Simulation results verify the effectiveness of the proposed method.At the same time,the influences of signal to noise ratio(SNR),snapshots and relative bandwidth on DOA estimation error are investigated by experiment.In addition,compared with some current relevant methods,the proposed method has lower computational complexity.