Adaptive Method of Slot and Bit Allocation for OFDMA Transmission Systems

抄録

This paper proposes the Orthogonal Frequency Division Multiple Access (OFDMA)transmission scheme withan adaptive slot and bit allocation method which can provide the broadband wireless LAN (WLAN) systems. From thefact that the radio links between di erent users and a base station experience the independent multi-path fading, this paperproposes a priority-based adaptive slot and bit allocation method in conjunction with an allocation adjustment method. The proposed method can achieve the higher e cient usage of frequency resource than those for the conventional xed slot as-signment with adaptive bit allocation method and the xed bit assignment with adaptive slot allocation method. This paperpresents various computer simulation results to evaluate the proposed method and demonstrates that the proposed method can achieve the higher frequency resourceutilization with less computation complexity in the severe frequency selectivemulti-path fading channels.