aw高A p(ylx,h) log,M+log, P(ylx.h) where M=.the ergodic capacity of the fading channel with M-QAM signaling is given by ∑pyx,h) COCAM =10g2-10g2 7.28) p(ylx,h) See Fig.7.13 for numerical results M-PSK bound Shannon bound (Rayleign Shannon bound (AWGN) 1-8-PSK QPSK 10 Eb/NO (dB) 23 23 2 ( |,) log 1 ( | ,) x p y xh p yxh M      2 2 ( |,) log log ( | ,) x p y xh M p yxh       where M = ||, the ergodic capacity of the fading channel with M-QAM signaling is given by MQAM CSIR 2 , , 2 ( | ,) log | | log ( |,) x xyh p yxh C p y xh              E   (7.28) See Fig. 7.13 for numerical results. -5 0 5 10 15 20 25 0 1 2 3 4 5 6 7 8 9 Eb/N0 (dB) Capacity C (bits per 2D symbol) M-PSK bound Shannon bound (Rayleign) Shannon bound (AWGN) 8-PSK QPSK