PREDICTIVE FH CONTROL FOR FH-OFDMA SYSTEMS

摘要

In this paper, we propose a method to predict FH patterns in FH-OFDMA systems. For 4th generation wireless communication systems, OFDM is recognized as a promising modulation technique. Multi-user allocation in OFDM system can use FH that provides the spectrum-spread techniques. If one can generate more predictable FH sequence, then performance of the system can be easily improved. Current random FH and simple adaptive FH methods, however, do not consider the important of accurately predicting FH sequence. In this paper we show that the sampling of the wireless faded signal is not realized as a certain probability nature. With this regard, the proposed predictive FH allocation method is designed to embed the unknown probability in the model. Simulation study shows that the predictive FH method is more accurately predict FH sequences than the random or simple adaptive FH method. We will further improve this proposed method to apply QoS control and MAC function development in OFDM based wireless physical structure.