A new DOA estimation for wideband signals
Jin Zhang · Journal of Circuits and Systems · 2012
Based on the test of orthogonality of projected subspaces algorithm(TOPS),a novel direction of arrival estimation method for wideband uncorrelated and coherent signals is proposed with a uniform linear array.Firstly,uncorrelated signals are resolved by applying TOPS directly.Secondly,at each frequency bin,the components of uncorrelated signals and noise are removed away by means of the differencing technique and a new matrix is then formed.Finally,spatial smoothing operation is performed on the new matrices and coherent signals are resolved with TOPS.The method can resolve more wideband signals than the array elements.Simulation results demonstrate its effectiveness.