Unified Approach to the Capacity Evaluation of the Relay Channel

Abstract

Abstract- We indicate the dependence between the inputs of the relay channel with one auxiliary random variable<br><br>as Cover, El-Gamal and Salehi have done so for the multiple access channel with arbitrarily correlated sources. Then,<br><br>by considering broadcast and multiple access sub-channels in the relay channel, we describe the essential role of the<br><br>relay with special Markovity conditions on the auxiliary random variable and channel input-outputs, and unify most of<br><br>known capacity theorems into one capacity theorem. Our capacity theorem potentially may be applicable to a more<br><br>general class of relay channels including at least the relay channels with known capacity.