Now showing items 1-1 of 1

  • Power and rate adaptation for MQAM/OFDM systems under fast fading channels 

    Authors:Dong, Zhicheng; Fan, Pingzhi; Zhou, Weixi; Panayirci, Erdal
    Publisher and Date:(IEEE, 2012)
    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 ...