tailieunhanh - Báo cáo hóa học: " Research Article Joint Channel-Network Coding for the Gaussian Two-Way Two-Relay Network"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Joint Channel-Network Coding for the Gaussian Two-Way Two-Relay Network | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010 Article ID 708416 13 pages doi 2010 708416 Research Article Joint Channel-Network Coding for the Gaussian Two-Way Two-Relay Network Ping Hu 1 Chi Wan Sung 1 and Kenneth W. Shum2 department of Electronic Engineering City University of Hong Kong Hong Kong department of Information Engineering The Chinese University of Hong Kong Hong Kong Correspondence should be addressed to Kenneth W. Shum wkshum@ Received 1 October 2009 Revised 27 January 2010 Accepted 13 March 2010 Academic Editor Sae-Young Chung Copyright 2010 Ping Hu et al. 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. New aspects arise when generalizing two-way relay network with one relay to two-way relay network with multiple relays. To study the essential features of the two-way multiple-relay network we focus on the case of two relays in our work. The problem of how two terminals equipped with multiple antennas exchange messages with the help of two relays is studied. Five transmission strategies namely amplify-forward AF hybrid decode amplify forward HLC hybrid decode amplify forward HMC decode forward DF and partial decode forward PDF are proposed. Their designs are based on a variety of techniques including network coding multiplexed coding multi-input multi-output transmission and multiple access with common information. Their performance is compared with the cut-set outer bound. It is shown that there is no dominating strategy and the best strategy depends on the channel conditions. However by studying their multiplexing gains at high signal-tonoise SNR ratio it is shown that the AF scheme dominates the others in high SNR regime. 1. Introduction Relay channel which considers the communication between a source node and