An Efficient Scheme for MIMO Broadcast Channels Based on Iterative User Selection

Dirty Paper Coding (DPC) is shown to achieve the capacity of Multiple-Input Multiple-Output (MIMO) Gaussian Broadcast Channels (BCs). In circuit data scenarios, users demand to get service at fixed desire rate. Finding the optimal covariance matrices and order of users for maximizing user capacity requires high complexity computation. To deal with this problem, many researchers use fixed order of users and get subpar performance. In this paper, the authors present an iterative user selection scheme that aims to maximize user capacity. The main feature of the proposed scheme is that it do not impose a fixed order on the users.