On spatial smoothing for direction-of-arrival estimation of coherent signals
Tie-Jun Shan, M. Wax, T. Kailath · IEEE Transactions on Acoustics Speech and Signal Processing · 1985
We present an analysis of a "spatial smoothing" preprocessing scheme, recently suggested by Evans et al., to circumvent problems encountered in direction-of-arrival estimation of fully correlated signals. Simulation results that illustrate the performance of this scheme in conjunction with the eigenstructure technique are described.