Robust Multiuser Detection in Chaotic Communication Systems over Non-gaussian Fading Channels

In this article, we deal with the problem of robust code division multiple access (CDMA) signal detection in a chaotic communication system transmitting across a Non-gaussian fading channel. Since the performance of robust multiuser detector depends on the selection of M-estimator and the spreading sequences, a new influence function is used to derive an improved robust detector for the problem of data detection in CDMA impulsive fading channels using chaotic spreading. Numerical results show that the proposed robustification offers improved performance over Huber's minimax detector and outperforms the DPSK decorrelating detector, particularly when the channel is highly impulsive.