calculate 4x4 MIMO capacity with 16 QAM on rayleih fading channel

Hello all,

In my project, I am trying to achieve near shannon performance for 4x4 MIMO using 16 QAM on rayleigh fading channel. For that i need to calculate the shannon capacity of rayleigh fading channel for 4x4 MIMO. Whats the formula/approach for that?
Is this code doing it right way?
http://www.mathworks.com/matlabcentr...annel-capacity

The programs seems to working fine, but experimental consideration must be modified as per ur end if you are implementing it practically