Sub-optimality of superposition coding region for three receiver broadcast channel with two degraded message sets
Chandra Nair, Mehdi M. Yazdanpanah · 2017
In this article, we resolve open problem 8.2 in [1]. We show that superposition coding is sub-optimal for a three receiver broadcast channel with two message sets (M0, M1) where two of the three receivers need to decode messages M0, M1) while the remaining one just needs to decode the message M0.