A low-complexity resource allocation scheme for single-user MIMO transmission

We investigate the resource allocation problem for the downlink of a spatial multiplexing (SM) based multiple input multiple output orthogonal frequency division multiple access (MIMO-OFDMA) based network. We address this problem in the context of the utility-based resource allocation presented in earlier papers in order to enhance the efficiency and guarantee fairness among users by exploiting multiuser diversity, frequency diversity, as well as time diversity. We design utility functions with respect to the average rate in order to simultaneously provide two services, real-time and best-effort. We propose a low-complexity joint subchannel and power control algorithm that converges very fast. Simulation results indicate that using the proposed method achieves near-optimum solutions and the available resources are distributed more fairly among users.