Title :
Half-duplex relaying based on quantize-and-forward
Author :
Yao, Sha ; Skoglund, Mikael ; Kim, Tùng T. ; Poor, H. Vincent
Author_Institution :
ACCESS Linnaeus Center, R. Inst. of Technol., Stockholm, Sweden
fDate :
July 31 2011-Aug. 5 2011
Abstract :
The original compress-and-forward relaying scheme uses the technique of random binning at the relay node and successive decoding at the destination node. Recently, a scheme (termed the quantize-and-forward scheme in this paper) without binning and using joint decoding at the destination node has been proposed, which has been shown to achieve the same rate as the original compress-and-forward scheme. Since the previous work focuses on the so-called full duplex relay network, in this paper, an adaption of it for relay networks with a half-duplex relay is provided. Coding schemes and achievable rate results are presented for discrete memoryless half-duplex relay channels and half-duplex additive white Gaussian noise (AWGN) relay channels. Moreover, slow fading channels are considered, for which outage-related performance measures are evaluated. Specifically, the outage probability and the expected rate of the quantize-and-forward scheme are derived and compared with other well-known schemes. Furthermore, the diversity-multiplexing tradeoff is derived. It is shown that the quantize-and-forward scheme is a more suitable scheme than the compress-and-forward scheme over slow fading channels and it achieves the optimal diversity-multiplexing trade-off of a half-duplex relay channel.
Keywords :
AWGN channels; decode and forward communication; decoding; fading channels; multiplexing; network coding; probability; AWGN relay channels; compress-and-forward relaying scheme; destination node; discrete memoryless half-duplex relay channels; diversity-multiplexing tradeoff; full duplex relay network; half-duplex additive white Gaussian noise relay channels; joint decoding; outage probability; quantize-and-forward relaying scheme; random binning technique; relay node; slow fading channels; successive decoding; AWGN; Decoding; Fading; Random variables; Relays; Signal to noise ratio; Source coding;
Conference_Titel :
Information Theory Proceedings (ISIT), 2011 IEEE International Symposium on
Conference_Location :
St. Petersburg
Print_ISBN :
978-1-4577-0596-0
Electronic_ISBN :
2157-8095
DOI :
10.1109/ISIT.2011.6034004