Conditional Entropy based User Selection for Multiuser MIMO Systems

摘要

We consider the problem of user subset selection for maximizing the sum rateof downlink multi-user MIMO systems. The brute-force search for the optimaluser set becomes impractical as the total number of users in a cell increase.We propose a user selection algorithm based on conditional differentialentropy. We apply the proposed algorithm on Block diagonalization scheme.Simulation results show that the proposed conditional entropy based algorithmoffers better alternatives than the existing user selection algorithms.Furthermore, in terms of sum rate, the solution obtained by the proposedalgorithm turns out to be close to the optimal solution with significantlylower computational complexity than brute-force search.