Paper Info
Title
SNR Decomposition for Full-Duplex Gaussian Relay Channel
Abstract
A relay channel (RC), consisting of a source, a relay, and a destination, is a basic transmission unit of cooperative communication networks. The capacity of an RC is not known in general. In this paper, an SNR decomposition (SD) strategy is presented to implement time sharing, which provides a new tractable and achievable rate for a full-duplex Gaussian RC. More specifically, we first expand the SNR of a relay destination channel (SNR-RD) into two terms under the relay power constraint and divide the system into two subbands. Then, we assign the obtained SNR-RD for each subband and employ decode-forward (DF) or compress-forward (CF) according to the assigned SNR-RD. It is shown that the achievable rate of the SD strategy is competitive with that of superposing CF on DF. As the superposition structure requires a sophisticated codeword design, the SD strategy provides another practical combination structure of DF and CF strategies. Approximations for the SNR-RD and bandwidth allocation for subbands are also given. Based on the obtained results, two application scenarios, i.e., mobile relay and quasi-static fading RCs, are also considered. Finally, various numerical results are shown to support our developed theoretical results.
Year
DOI
Venue
2015
10.1109/TWC.2014.2361119
IEEE Transactions on Wireless Communications
Keywords
Field
DocType
relay networks (telecommunication),gaussian channels,snr decomposition (sd),codeword design,decode-forward channel,quasistatic fading rc,decode and forward communication,cf strategies,compress-forward (cf),relay power constraint,snr decomposition,cooperative communication,compress-forward channel,df strategies,cooperative communication networks,sd strategy,relay destination channel,fading channels,decode-forward (df),gaussian relay channel,bandwidth allocation,superposition structure,time sharing,mobile radio,full-duplex gaussian relay channel,mobile relay,snr-rd,combination structure,transmission unit,wireless communication,resource management,bandwidth,decoding,signal to noise ratio,encoding
Topology,Relay channel,Telecommunications,Fading,Computer science,Signal-to-noise ratio,Communication channel,Real-time computing,Bandwidth (signal processing),Decoding methods,Relay,Duplex (telecommunications)
Journal
Volume
Issue
ISSN
14
2
1536-1276
Citations 
PageRank 
References 
6
0.43
16
Authors
3
Name
Order
Citations
PageRank
Zhengchuan Chen160.43
Pingyi Fan21282132.85
K. B. Letaief311078879.10