Title :
Source Coding Rate Allocation in Orthogonal Compress-and-Forward Relay Networks
Author :
Zeitler, Georg ; Brehmer, Johannes ; Bauch, Gerhard ; Widmer, Joerg
Author_Institution :
Inst. for Commun. Eng., Tech. Univ. Munchen, Munich, Germany
Abstract :
The source coding rate allocation problem for the orthogonal multiple-access relay channel with M users and compress-and-forward at the relay is addressed. In case of Gaussian codebooks at the sources and Gaussian channels, we show that the sum-rate-optimal assignment of source coding rate at the relay is given by waterfilling. For general modulation alphabets at the sources and finite-alphabet discrete memoryless channels, the source coding rate allocation problem is formulated using the information bottleneck method, based on which we appropriately modify a standard cutting-plane algorithm to numerically compute an optimal source coding rate vector at the relay.
Keywords :
Gaussian processes; orthogonal codes; radio networks; source coding; Gaussian channels; Gaussian codebooks; finite-alphabet discrete memoryless channels; general modulation alphabets; information bottleneck method; optimal source coding rate vector; orthogonal compress-and-forward relay networks; orthogonal multiple-access relay channel; source coding rate allocation problem; standard cutting-plane algorithm; waterfilling; Communications Society; Decoding; Frequency; Gaussian channels; Laboratories; Memoryless systems; Modulation coding; Relays; Signal Processing Society; Source coding;
Conference_Titel :
Communications (ICC), 2010 IEEE International Conference on
Conference_Location :
Cape Town
Print_ISBN :
978-1-4244-6402-9
DOI :
10.1109/ICC.2010.5501864