Replication-based Outer bounds and the Optimality of "Half the Cake" for Rank-Deficient MIMO Interference Networks

Bofeng Yuan, Hua Sun, Syed A. Jafar

In order to gain new insights into MIMO interference networks, the optimality of ${\sum }_{k=1}^K{M}_k/2$ (half the cake per user) degrees of freedom is explored for a $K$-user multipl…