On the capacity of maximum selection in MIMO multicast network

In the open-loop multiple input multiple output (MIMO) multicast network, space-time block coding (STBC) is a remarkable transmission scheme with an elegant mathematical solution and full diversity. However, the open-loop design has no special strategies for the worst channel-case user, whereas the multicast design need pay more attention to the worst channel- case user than the average performance with respect to all users in the multicast group. This paper is motivated by the need for certain application of limited channel state information feedback in the MIMO multicast network. The maximum selection in the MIMO unicast network is extended to the MIMO multicast network and some relevant design principles are proposed. Specifically, we investigate some basic information theory results that promise some advantages of using the proposed schemes. Compared to the baseline, i.e., the capacity behavior of the open-loop STBC scheme, we present some scenarios for the application of the proposed schemes.