Convergence analysis of iterative interference cancellation receivers for turbo-coded DS-CDMA systems

We investigate the behaviour of iterative interference cancellation receivers in turbo-coded DS-CDMA systems. We propose a methodology for the convergence analysis of the receivers. Our method is based on the Gaussian approximation technique. Analytical expressions for the SNR transfer function of the interference cancellation stage of the receiver are presented. This is in contrast to the semi-analytical approach that has been used in the literature to determine the variance transfer function of the interference cancellation stage. Results show that the proposed methodology is accurate for the convergence analysis of the iterative interference cancellation receiver