|Publisher version (open access)||131 KB||Adobe Acrobat PDF||View/Open
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/927177
- Capacity theorems for the AWGN multi-way relay channel
Kellett, Christopher M.;
Johnson, Sarah J.
- The University of Newcastle. Faculty of Engineering & Built Environment, School of Electrical Engineering and Computer Science
- The L-user additive white Gaussian noise multi-way 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 compress-forward 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 complete-decode-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, complete-decode-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.
- 2010 IEEE International Symposium on Information Theory (ISIT 2010). Proceedings of the 2010 IEEE International Symposium on Information Theory (ISIT 2010) (Austin, TX 13-18 June, 2010) p. 664-668
- Publisher Link
- Institute of Electrical and Electronics Engineers (IEEE)
signal to noise ratio
- Resource Type
- conference paper
- Copyright © 2010 IEEE. Reprinted from 2010 IEEE International Symposium on Information Theory (ISIT 2010). This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Newcastle's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to email@example.com. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.