We propose a new coding technique based on nested coset codes and derive a new achievable rate region for a general three user discrete memoryless broadcast channel (DMBC). We identify an example of a three user binary broadcast channel for which the proposed achievable rate region strictly outperforms that obtained by a natural extension of Marton's [1] rate region. As a step towards deriving the achievable rate region for the general three user DMBC, we introduce the new elements of our coding theorem through a new class of broadcast channels called 3-to-1 broadcast channels.
Authors in REF derived an inner bound based on coset codes for the three users BC.
A new coding theorem for three user discrete memoryless broadcast channel
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Mathematics Computer Science