Direction finding of coherent signals via spatial smoothing for uniform circular arrays
M. Wax, J. Sheinvald · IEEE Transactions on Antennas and Propagation · 1994
We present a preprocessing technique that in conjunction with spatial smoothing circumvents the difficulty of direction-of-arrival estimation of coherent signals in the case of uniform circular arrays. Special consideration is given to problems arising in practice, such as mutual coupling and array geometry imperfections. Simulation results illustrating the performance of this scheme in conjunction with the MUSIC method are included.>