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The communication strategies for coded bidirectional (two-way) relaying emerge as a result of successful amalgamation of the recent ideas from network coding and the broadcast/interfering nature of the wireless communication medium. In this paper, the authors consider the basic scenario in which two terminal nodes carry out a two-way communication, helped by a third, relay node. Insights are provided into several important ideas that arise in this simple communication scenario. The communication mechanisms can be divided into two groups, depending whether the relay node is or is not required to decode the messages from the terminals.
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