Effect of tracking error on DS/CDMA successive interference cancellation

Since the optimal DS/CDMA multiuser detector is too complex, much work is being done in order to see whether a practical version is feasible. Among the issues that need to be addressed are departures from ideal assumptions that may affect the performance. The authors derive results for the performance degradation that a successive interference cancellation scheme experiences due to synchronization tracking error. Results are displayed as a function of the synchronization tracking error, normalized to the chip duration. It is shown that the interference canceller still retains a performance advantage over the conventional detector