An optimal subcarrier allocation algorithm is proposed for orthogonal frequency
division multiple access systems over Rayleigh fading channels with channel state
information feedback. The transmitted orthogonal frequency division multiple access
frame is divided into groups called subchannels according to the detected number of
users at the base station. The pilots are reduced for the stable subchannel and replaced
with additional data subcarriers in order to increase the total system throughput.
Simulation and semi-analytical results demonstrate that the throughput performance of
the proposed method outperforms the conventional approaches.
Keywords:OFDMA, Optimized Methods, Subcarrier Allocation.
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