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Hybrid Demodulate-Forward Relay Protocol for Two-Way Relay Channels

Luo, Chunbo, Parr, Gerard, McClean, Sally I, Peoples, Cathryn and Wang, Xinheng (2015) Hybrid Demodulate-Forward Relay Protocol for Two-Way Relay Channels. IEEE Transactions on Wireless Communications, 14 (8). pp. 4328-4341. [Journal article]

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URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7079523

DOI: 10.1109/TWC.2015.2419627


Two-Way Relay Channel (TWRC) plays an important role inrelay networks, and efficient relaying protocols are particularly importantfor this model. However, existing protocols may not be able to realizethe potential of TWRC if the two independent fading channels are notcarefully handled. In this paper, a Hybrid DeModulate-Forward (HDMF)protocol is proposed to address such a problem. We first introduce thetwo basic components of HDMF - direct and differential DMF, and thenpropose the key decision criterion for HDMF based on the correspondinglog-likelihood ratios. We further enhance the protocol so that it can beapplied independently from the modulation schemes. Through extensivemathematical analysis, theoretical performance of the proposed protocolis investigated. By comparing with existing protocols, the proposed HDMFhas lower error rate. A novel scheduling scheme for the proposed protocolis introduced, which has lower length than the benchmark method. Theresults also reveal the protocol’s potential to improve spectrum efficiencyof relay channels with unbalanced bilateral traffic

Item Type:Journal article
Keywords:Two-way relay, hybrid demodulate-forward, maximum likelihood detection, Log-likelihood ratio, queue analysis, scheduling
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Computing and Information Engineering
Research Institutes and Groups:Computer Science Research Institute
Computer Science Research Institute > Information and Communication Engineering
ID Code:32068
Deposited By: Professor Sally McClean
Deposited On:10 Jul 2015 11:55
Last Modified:25 Jan 2016 12:34

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