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arXiv 1111.3395cs.ITmath.IT
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一类多路中继信道的容量

The Capacity of a Class of Multi-Way Relay Channels

Lawrence Ong, Sarah J. Johnson, Christopher M. Kellett

摘要:

一类多路中继信道的容量,其中L个用户通过一个中继通信(在可能不同的速率),推导出的情况下,其中的信道输出是信道输入和接收机噪声的模和。割集上限的能力是可以实现的。更具体地,使用(i)速率分割、(ii)函数解码转发和(iii)联合信源-信道编码来实现容量。我们注意到,虽然单独的信源-信道编码可以实现共同速率容量,但是联合信源-信道编码用于实现用户以不同速率发送的一般情况的容量。

英文摘要:

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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