Libo Zhong Fady Alajaji Glen Takahara Error analysis for nonuniform signaling over Rayleigh fading channels. 39-43 2005 53 IEEE Transactions on Communications 1 http://doi.ieeecomputersociety.org/10.1109/TCOMM.2004.840641 db/journals/tcom/tcom53.html#ZhongAT05