Title :
A half-duplex relay coding scheme optimized for energy efficiency
Author :
Parzysz, Fanny ; Vu, Mai H. ; Gagnon, François
Author_Institution :
Ecole de Technol. Super., Montreal, QC, Canada
Abstract :
We explore the issue of the network energy efficiency in relay channels. We first propose a half-duplex decode-forward coding scheme. We then optimize the power allocation to minimize the total power consumption while maintaining a desired source rate. We show that this scheme significantly outperforms direct and two-hop transmissions. Moreover, it reduces the relay energy consumption by up to 7dB, which is beneficial for shared relay stations, and smooths out transmit power peaks, which simplifies interference management.
Keywords :
decode and forward communication; minimisation; network coding; radiofrequency interference; wireless channels; energy efficiency; half-duplex decode-forward coding scheme; half-duplex relay coding scheme; interference management; power allocation; power consumption; relay channels; relay energy consumption; relay stations; two-hop transmissions; AWGN; Encoding; Power demand; Relays; Resource management; Routing; Achievable rate; Coding scheme; Energy efficiency; Half-duplex; Relay channel;
Conference_Titel :
Information Theory Workshop (ITW), 2011 IEEE
Conference_Location :
Paraty
Print_ISBN :
978-1-4577-0438-3
DOI :
10.1109/ITW.2011.6089442