Heterogeneous Broadcast Channel: Spatial Diversity or Advanced Receiver Design
In this paper, the authors look at the simplest instance of heterogeneous Broadcast Channel (BC) where a multi-antenna transmitter Base Station (BS) is trying to communicate data to two User Equipments (UEs), having the perfect CSIT about UE-1 and no CSIT about UE-2. They focus on UE-2 which is severely limited by the interference of UE-1. They consider the question whether additional spatial diversity or advanced receiver design at UE-2 is feasible for mitigating this interference. They investigate both the options and show that the rate of UE-2 gets significantly improved in both cases however hardware and RF design constraints may make the advanced receiver design solution preferable over spatial diversity solution.