Thanks for rating!
For QAM input, I follow the equation (11) in paper
Coded modulation in the block-fading channel: Coding theorems and code
construction

Can you let me know the original equations for the QAM capacity?
I mean the equation before Gaussâ€“Hermite quadrature and that after Gaussâ€“Hermite quadrature also.
If you send me equations, I really appreciate it!