New robust multiuser detector in flat fading asynchronous non-Gaussian channels using chaotic spatio-temporal spreading

摘要

In this paper, we address the problem of improved robust CDMA signal detection in asynchronous non Gaussian flat-fading channels. Since the performance of robust multiuser detector depends on the selection of M-estimator and the spreading sequences, the new influence function proposed in [5] with spatio-temporal chaotic spreading is considered to develop a new better performing robust detector for the problem of data detection in asynchronous CDMA impulsive fading channels. It is shown, through computer simulations that the performance gains offered by the proposed detector, also extend to asynchronous transmissions via fading channels, particularly when the channel is strongly impulsive.