A linear smoothing method for enhancing near-far resistance of CDMA detectors

The near-far problem in a multiuser setting places fundamental limitations on the performance of CDMA communication systems. In the past, significant effort has focused on designing practical, and hence suboptimum, detectors to combat multiple access interference (MAI). However, the optimality in near-far resistance is generally lost with suboptimum detectors. One method which can enhance the near-far resistance of suboptimum detectors under multipath channels is presented. The proposed method is able to overcome the shortcomings of existing methods. Computer simulations confirm the theoretical findings.