Improved partial parallel interference cancellation for CDMA
Li Cui · Journal of the China Railway Society · 2001
In this paper, we propose an improved partial parallel interference cancellation algorithm based on the partial interference cancellation approach suggested by Divalar and Simon . In this scheme, allowing for the reliability of data estimations to vary from one user to another, it is more reasonable for each user to have its own weight, rather than one constant weight for all users in each stage . The weights are obtained by minimizing the mean square error between the receiver signal and its estimate through a least mean square (LMS) algorithm. The implementation complexity of the algorithm is linear in the number of users, which is much lower than that of linear multiuse detectors. In AWGN channel, simulation results show that the proposed scheme outperforms the partial parallel interference cancellation.