Iterative Channel Estimation and Decoding of LDPC Coded BICM on block fading channels

摘要

This paper focuses on the performance analysis of regular LDPC coded BICM for block fading channels. We propose an iterative receiver which carries out channel estimation and decoding iteratively via belief propagation algorithm over coherent and non-coherent block fading channels and derive the ML and MAP channel estimator for higher order modulations. Analysis shows that as Signal-to-Noise Ratio (SNR）or channel memory increases, MAP channel estimator becomes ML channel estimator. Simulation result verifies our analysis.