Energy efficient predictive AMC with adaptive SNR-based power allocation in MIMO radio networks

Abstract

To achieve high data rate and reliability, the multiple-input and multiple-out (MIMO) scheme has been proposed while enabling compatible with the existing wireless networks. However, MIMO suffers from high mobility, inefficient power allocation and various-type of wireless interferences, because the quality of wireless-channels in MIMO significantly affects the determination of modulation and coding scheme (MCS) and the system capacity. The power efficiency, system capacity and the MCS selection are thus degraded significantly. This paper thus proposed a predictive MCS selection with adaptive MIMO power allocation to achieve high system capacity and power efficiency, while overcoming these disadvantages. Additionally, an MCS hysteresis scheme is proposed to avoid unnecessary MCS change and to minimize the overhead of changing MCSs. Numerical results indicate that the proposed approach significantly outperforms the compared approaches in system capacity, the probability of MCS change, and the accuracy of MCS determination.