Joint direction of departure, time delay, and frequency shift estimation of multi-user MC CDMA signals in multipath scenario

MUSIC type algorithm for joint estimation of parameters in asynchronous MC CDMA systems with antenna array at the transmit and single antenna at the receive side is presented in this paper. The proposed algorithm enables joint of direction of departure (DoD), time delay, and frequency shift estimation of multi-user MC CDMA signals. The algorithm is suitable for use in fading channels and can be used for multipath channel identification. Developed algorithm is near-far resistant, requires no preamble, and can be also applied when user sequences at the transmit or the receive side are not perfectly orthogonal.