DocumentCode :
2976060
Title :
Optimal Resource Allocation and Performance Comparison of Half-Duplex Relay Strategies
Author :
Li, Yong ; Wang, Wenbo ; Kong, Jia ; Peng, Mugen
Author_Institution :
Wireless Signal Process. & Network Lab., Beijing Univ. of Posts & Telecommun., Beijing, China
fYear :
2010
fDate :
18-21 April 2010
Firstpage :
1
Lastpage :
6
Abstract :
Although the established capacity results for the classic three-node relay channel rely on the assumption of full-duplex relay nodes, it´s practically difficult for radio transceivers to support simultaneous signal transmission and reception. Time-division half-duplex relay strategies have thus been proposed to address this limitation. Amplify-and-forward (AF) and decode-and-forward (DF) are two well-known half-duplex relay strategies in the literature. Later, DF approach was extended by the so-called variable-rate two-phase relay strategy, in which the transmission rates for both phases are not necessarily the same. More recently, a novel half-duplex relay strategy based on the information theoretical concepts of broadcast channel (BC) and multiple access channel (MAC) models is proposed. In this approach, the source broadcasts distinct data flows to the destination and the relay respectively during the first phase, and in the second phase the relay forwards the received information whereas the source sends another data flow to the destination. In this paper, we will first develop optimal resource allocation, in terms of power and time, for these half- duplex relay strategies, and then compare their performance under various link conditions.
Keywords :
Gaussian channels; broadcast channels; resource allocation; MAC model; amplify-and-forward strategy; broadcast channel; decode-and-forward strategy; half-duplex relay strategy; multiple access channel model; optimal resource allocation; relay channel; Broadcasting; Communications Society; Decoding; Laboratories; Peer to peer computing; Relays; Resource management; Signal processing; Space time codes; Wireless communication;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications and Networking Conference (WCNC), 2010 IEEE
Conference_Location :
Sydney, NSW
ISSN :
1525-3511
Print_ISBN :
978-1-4244-6396-1
Type :
conf
DOI :
10.1109/WCNC.2010.5506616
Filename :
5506616
Link To Document :
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