Los Alamitos, California：Institute of Electrical and Electronics Engineers (IEEE)
By using what we call the pre-averaging method, an exact closed form expression for the symbol error probability (SEP) is derived for arbitrary rectangular M-QAM signaling in OFDM systems over frequencyselective Rayleigh fading channels. In addition, the channel capacity for the QAM OFDM transmission over Rayleigh fading environment is obtained.
Advanced Information Networking and Applications, 2005. AINA 2005. 19th International Conference on, vol.2, pp.453-456