Power and rate adaptation for MQAM/OFDM systems under fast fading channels
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Date
2012
Authors
Dong, Zhicheng
Fan, Pingzhi
Zhou, Weixi
Panayırcı, Erdal
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE
Abstract
In this paper the effect of power and rate adaptation on the spectral efficiency of orthogonal frequency division multiplexing (OFDM) systems using M-ary quadrature amplitude modulation (MQAM) is investigated in the presence of the fast fading channels under power and instantaneous bit error rate (BER) constraints. A lower bound on the maximum spectral efficiency of adaptive OFDM/MQAM systems is obtained together with a closed-form expression for the average spectral efficiency of adaptive OFDM systems. Theoretical and numerical results show that the adaptive MQAM/OFDM systems under fast fading channel have substantial gain in spectral efficiency over the non-adaptive counterparts.
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Keywords
Orthogonal Frequency Division Multiplexing (OFDM), Intercarrier Interference (ICI), Power and rate adaptation, Spectral efficiency, High mobility
Turkish CoHE Thesis Center URL
Citation
1
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