Title :
Adaptive Compress-and-Forward Relaying in Fading Environments with or without Wyner-Ziv Coding
Author :
Sneessens, Harold H. ; Vandendorpe, Luc ; Laneman, J. Nicholas
Author_Institution :
Univ. Catholique de Louvain, Louvain-la-Neuve, Belgium
Abstract :
Compress-and-Forward is a protocol for transmission over relay networks in which the relay forwards a compressed version of the signal it observes. The compression method used by the relay is source coding with side information, i.e. Wyner-Ziv coding, since the destination can use the signal it receives directly from the source as side information. This paper addresses the case of a wireless relay network with orthogonal transmissions from the source and the relay terminals; we show that when the transmitters have no instantaneous channel state information the optimal compression parameters often make Wyner-Ziv coding reduce to conventional source compression, i.e. compression that does not take into account the side information available at the destination. This result simplifies the implementation of the CF protocol in the case we consider, since it shows that in several situations one can use more convenient compression methods without significant performance loss.
Keywords :
fading channels; source coding; Wyner-Ziv coding; adaptive compress-and-forward relaying; channel state information; fading environments; optimal compression parameters; orthogonal transmissions; source coding; wireless relay network; Communications Society; Decoding; Fading; Frequency; Intelligent networks; Protocols; Relays; Source coding; Transmitters; USA Councils;
Conference_Titel :
Communications, 2009. ICC '09. IEEE International Conference on
Conference_Location :
Dresden
Print_ISBN :
978-1-4244-3435-0
Electronic_ISBN :
1938-1883
DOI :
10.1109/ICC.2009.5198699