A fast converging multi-user detection for IDMA based on time-reversal

In this paper, we propose a fast converging multiuser detection for interleave-division multiple access (IDMA) system based on time-reversal (TR) technique. The proposed algorithm uses the time-reversed version of the channel impulse responses (TR-CIR) obtained from the uplink to process the received signal before the elementary signal estimator (ESE). With the help of the weak correlation of fading channel for difference user end (UE), the signal to interference and noise ratio (SINR) at the beginning of turbo-like detection of the proposed algorithm is much higher than that of the traditional methods. Thus the SINR evaluation speed is much faster, and less iteration number can be achieved in the proposed algorithm.