The Capacity of a Class of Multi-Way Relay Channels

Details The Capacity of a Class of Multi-Way Relay Channels The Capacity of a Class of Multi-Way Relay Channels

2011-11-15

arxiv.org/abs/1111.3395v1

Proceedings of the 12th IEEE International Conference on Communications Systems (ICCS 2010), Singapore, pp. 346--350, Nov. 17-

Computer Science

Information Theory

Scientific paper

10.1109/ICCS.2010.5686491

The capacity of a class of multi-way relay channels, where L users communicate via a relay (at possibly different rates), is derived for the case where the channel outputs are modular sums of the channel inputs and the receiver noise. The cut-set upper bound to the capacity is shown to be achievable. More specifically, the capacity is achieved using (i) rate splitting, (ii) functional-decode-forward, and (iii) joint source-channel coding. We note that while separate source-channel coding can achieve the common-rate capacity, joint source-channel coding is used to achieve the capacity for the general case where the users are transmitting at different rates.

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