Performance Evaluation of Interference Cancellation Technique based on Maximum Correlation Detection for Single User DS-CDMA Receiver in Rayleigh Fading Channels

摘要

Authors have proposed so far a new single user interference cancellation method for direct-sequence code-division multiple-access (DS-CDMA). This system has an ability to overcome the near-far problem (NFP) without using any particular power control technique. In this method, it generates all replica patterns of the interference signals by discovering the unknown spreading sequences of all interference users and estimating their amplitudes. Then, it takes correlation between the received signal and each replica so as to find which combination replica takes the maximum value. The maximum correlation replica is considered as the true interference signal. Then, interference cancellation is done by subtracting all estimated interference signals from the received signal. It has confirmed that proposed method outperforms the conventional receiver under white Gaussian noise channels. In this paper, we examine the performance of the proposed receiver in Rayleigh fading channel with an assistance of the pilot symbols. The proposed method is applied to the slow fading environment such as mobile satellite and ad-hoc network.