TY - GEN
T1 - Power optimization for layered transmission over decode-And-forward relay channels
AU - Attia, Mohamed Adel
AU - Shaqfeh, Mohammad
AU - Seddik, Karim
AU - Alnuweiri, Hussein
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/9/22
Y1 - 2014/9/22
N2 - In this paper, we consider a fading relay channel where the source uses two layers source coding with successive refinement. The two source layers are transmitted using superposition coding at the source and relay with optimal power allocation, and successive interference cancellation at the receivers (i.e. relay and destination). The power allocation for the two layers at the source and relay is subject to optimization in order to maximize the expected user satisfaction that is defined by a utility function of the total decoded rates at the destination. We assume that only the channel statistics are known. The relay is half-duplex and applies decode and forward. We characterize the expected utility function in terms of the channel statistics of the fading channels, and we solve the optimization problem using the numerical random search method. We provide many numerical examples to show the prospected gains of using the relay on the expected utility for different channel conditions. Furthermore, we obtain that for some conditions, it is optimal to send only one layer.
AB - In this paper, we consider a fading relay channel where the source uses two layers source coding with successive refinement. The two source layers are transmitted using superposition coding at the source and relay with optimal power allocation, and successive interference cancellation at the receivers (i.e. relay and destination). The power allocation for the two layers at the source and relay is subject to optimization in order to maximize the expected user satisfaction that is defined by a utility function of the total decoded rates at the destination. We assume that only the channel statistics are known. The relay is half-duplex and applies decode and forward. We characterize the expected utility function in terms of the channel statistics of the fading channels, and we solve the optimization problem using the numerical random search method. We provide many numerical examples to show the prospected gains of using the relay on the expected utility for different channel conditions. Furthermore, we obtain that for some conditions, it is optimal to send only one layer.
KW - Broadcast approach
KW - multilayer transmission
KW - relay channel
KW - selection relaying decode-And-forward
KW - utility maximization
UR - http://www.scopus.com/inward/record.url?scp=84908637014&partnerID=8YFLogxK
U2 - 10.1109/IWCMC.2014.6906423
DO - 10.1109/IWCMC.2014.6906423
M3 - Conference contribution
AN - SCOPUS:84908637014
T3 - IWCMC 2014 - 10th International Wireless Communications and Mobile Computing Conference
SP - 594
EP - 599
BT - IWCMC 2014 - 10th International Wireless Communications and Mobile Computing Conference
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 10th International Wireless Communications and Mobile Computing Conference, IWCMC 2014
Y2 - 4 August 2014 through 8 August 2014
ER -