Table of Contents
International Scholarly Research Notices
Volume 2015 (2015), Article ID 493767, 10 pages
http://dx.doi.org/10.1155/2015/493767
Research Article

Improved Iterative Decoding of Network-Channel Codes for Multiple-Access Relay Channel

Department of Electronics and Telecommunication, National Institute of Technology, Raipur, Chhattisgarh, India

Received 15 June 2015; Revised 8 October 2015; Accepted 18 October 2015

Academic Editor: Seung-Hoon Hwang

Copyright © 2015 Saikat Majumder and Shrish Verma. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Cooperative communication using relay nodes is one of the most effective means of exploiting space diversity for low cost nodes in wireless network. In cooperative communication, users, besides communicating their own information, also relay the information of other users. In this paper we investigate a scheme where cooperation is achieved using a common relay node which performs network coding to provide space diversity for two information nodes transmitting to a base station. We propose a scheme which uses Reed-Solomon error correcting code for encoding the information bit at the user nodes and convolutional code as network code, instead of XOR based network coding. Based on this encoder, we propose iterative soft decoding of joint network-channel code by treating it as a concatenated Reed-Solomon convolutional code. Simulation results show significant improvement in performance compared to existing scheme based on compound codes.