Comparative Evaluation of Prediction Heuristics for Wireless Channels
Ana Aguiar, Adam Wolisz · 2006
Impairments in wireless data communication due to time and location dependent errors can be overcome by using channel-adaptive techniques, like channel-aware scheduling or adaptive modulation. These techniques require information about channel behaviour obtained from channel predictors. Unfortu- nately enough the accuracy of predictors usually suggested in the literature has not been confirmed and comparative studie s do not exist (with one exception). In addition, existing predictors are frequently difficult to compute and sensitive to numerou s parameters, e.g. noise and channel variability. In this paper, we investigate and compare the performance accuracy of three simple heuristics for channel prediction. Our investigation includes a comparison with a verified referen ce predictor using Rayleigh channels and measured WLAN traces. Our study indicates the usefulness of the investigated heuristics for fixed systems and pedestrian speed mobility.