Link level performance analysis of adaptive MIMO-OFDM systems

Link Adaptation Schemes are used to improve the channel's spectral efficiency by adapting the transmission parameters to the time varying channel. Furthermore, these adaptive systems provide substantial gains in performance, less complexity and reduced feedback overhead. This paper develops an analytical framework designed to investigate the link level performance of rate adaptation in a time-varying channel for MIMO OFDM systems. The paper addresses outdated CSI impact due to feedback delay and derived new thresholds for SNR, results are compared with the simulation results.