DocumentCode :
2915141
Title :
Finite-SNR Diversity-Multiplexing Tradeoff for Two-Way Relay Fading Channel
Author :
Lin, Xiaochen ; Tao, Meixia ; Xu, Youyun ; Wang, Xiaodong
Author_Institution :
Dept. of Electron. Eng., Shanghai Jiao Tong Univ., Shanghai, China
fYear :
2010
fDate :
23-27 May 2010
Firstpage :
1
Lastpage :
6
Abstract :
This paper studies the performance limits of two-way relay channel (TWRC) at finite signal-to-noise ratio (SNR) in Rayleigh fading environment. A two-phase decode-and-forward (DF) protocol is considered. We first derive closed-form expressions for both outage probability and diversity-multiplexing tradeoff (DMT). Our results are general and suitable for any time sharing and any rate allocation in the two-way relay protocol. It is found that DF outperforms amplify-and-forward (AF) when either multiplexing gain or SNR is small enough, otherwise, DF is inferior to AF in term of outage probability. Meanwhile, finite-SNR DMT of DF is always lower than that of AF regardless of SNR due to the additional sum-rate constraint imposed on the relay node for full decoding. Furthermore, the optimum relay location for any given combination of time sharing and rate allocation is presented.
Keywords :
Rayleigh channels; channel allocation; channel coding; decoding; diversity reception; multiplexing; probability; Rayleigh fading environment; amplify-and-forward; diversity-multiplexing tradeoff; finite signal-to-noise ratio; finite-SNR diversity-multiplexing tradeoff; optimum relay location; outage probability; rate allocation; sum-rate constraint; time sharing; two-phase decode-and-forward protocol; two-way relay fading channel; two-way relay protocol; Closed-form solution; Decoding; Fading; MIMO; Measurement; OFDM modulation; Peer to peer computing; Protocols; Relays; Time sharing computer systems;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications (ICC), 2010 IEEE International Conference on
Conference_Location :
Cape Town
ISSN :
1550-3607
Print_ISBN :
978-1-4244-6402-9
Type :
conf
DOI :
10.1109/ICC.2010.5502771
Filename :
5502771
Link To Document :
بازگشت