Throughput Analysis of Band-AMC Scheme in Broadband Wireless OFDMA System
Source: Korea University
In broadband wireless Orthogonal Frequency Division Multiple Access (OFDMA) systems where a set of sub-carriers are shared among multiple users, the overall system throughput can be improved by a band-AMC mode that assigns each suband, a set of contiguous sub-carriers within a coherence bandwidth, to individual user with the better channel quality. As long as channel qualities for the sub-bands of all users are known a priori, multi-user and multiband gains can be simultaneously achieved with opportunistic scheduling. This paper presents an analytical means of evaluating the maximum system throughput for a band-Adaptive Modulation and Coding (AMC) mode under the various system parameters.