Performance analysis of turbo equalization for nonlinear channels

Abstract

This paper presents the performance for turbo equalization of ISI caused by a nonlinear satellite channel. Mutual information transfer characteristics are used to highlight the performance of the proposed turbo equalization and confirm convergence of the iterative scheme. An equivalent SNR model for the nonlinear channel is presented which shows direct correspondence between the linear and nonlinear channels. The nonlinear channel equalizer is based on a soft interference cancellation approach which has linear complexity with modulation order and channel memory