Iterative FDE for asynchronous single-carrier multiuser systems

When the arrival timing difference exists in the uplink MUMIMO systems, the conventional MUD techniques, without timing control, failed under this circumstance. In this paper, we proposed a joint distortion precancelation and iterative FDE architecture, without timing control, for the asynchronous system. The proposed method derives the iterative FDE filters, via the MMSE criterion, by treating the precanceled distortion components as colored noise. The asymptomatic MSE performance is shown to approach MFB, and the achievable SER performance is evaluated in various system settings, which confirms its effectiveness.