Performance Evaluation of Opportunistic Beamforming with SINR Prediction for HSDPA

In this paper, opportunistic beamforming for HSDPA is considered. Opportunistic beamforming can jointly increase the system throughput and the quality of service in multiuser communication systems with proportional-fair scheduling, since with this beamforming scheme a user experiences more fading peaks in a given period of time. However, the existence of an SINR feedback delay from the user to the base station degrades the performance in such a system rapidly due to outdated and thus mismatched SINR information. Here, the prediction of the SINR in the base station is proposed with a predictor structure that is matched to the beamforming process.