PROPOSED FAST CONVERGENCE TECHNIQUE FOR SINR MAXMIN PROBLEM IN MIMO WIRELESS RELAY NETWORK

Abstract

Nonconvex SINR constraints in amplify-and-forward (AF) multiple-input
multiple-output (MIMO) relay beamforming problems make the design
mathematically intractable. A more practical optimization is to maximize the
minimum SINR achievable data rate among all the users. The previously existing
methods invoke the vectorization of pre-coding matrix X and then introduce the
auxiliary variable matrix of lager dimension which results in an increased
computational complexity. In order to deal with large size problems, the number of
additional variables should be reduced. In this article, we propose to use the
optimization technique to improve the optimal speed through the minmax SINR
problem in which the dimension of the optimization problem is significantly
smaller than that of the mentioned DCI approach.