Performance analysis of cooperative LDPC coding for wireless network

Abstract

Cooperative communication represents a way of achieving diversity in wireless network. Cooperative coding is a channel code that exploits user cooperation gains. In this paper we present LDPC codes that have the capability of providing full cooperation diversity, while achieving maximum possible diversity gain and coding gain. We analyze the performance of cooperative communication with LDPC codes over noncooperative or direct communication in Rayleigh fading channel. A traditional three node model is developed to analyze the performance where relay helps to do the cooperative communication. We illustrate that cooperative LDPC codes offers more than 3 dB gain over direct transmission in the high SNR region for MPSK and MQAM modulation even when the inter-user channel is noisy.