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CORR
2010
Springer

Capacity Theorems for the AWGN Multi-Way Relay Channel

13 years 11 months ago
Capacity Theorems for the AWGN Multi-Way Relay Channel
Abstract--The L-user additive white Gaussian noise multiway relay channel is considered, where multiple users exchange information through a single relay at a common rate. Existing coding strategies, i.e., complete-decode-forward and compressforward are shown to be bounded away from the cut-set upper bound at high signal-to-noise ratios (SNR). It is known that the gap between the compress-forward rate and the capacity upper bound is a constant at high SNR, and that between the completedecode-forward rate and the upper bound increases with SNR at high SNR. In this paper, a functional-decode-forward coding strategy is proposed. It is shown that for L 3, completedecode-forward achieves the capacity when SNR 0 dB, and functional-decode-forward achieves the capacity when SNR 0 dB. For L = 2, functional-decode-forward achieves the capacity asymptotically as SNR increases.
Lawrence Ong, Christopher M. Kellett, Sarah J. Joh
Added 09 Dec 2010
Updated 09 Dec 2010
Type Journal
Year 2010
Where CORR
Authors Lawrence Ong, Christopher M. Kellett, Sarah J. Johnson
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