I have found a similar work which has the graphs required by you. This might help. Found this coorelating to another work.
that link might help.
15 Oct 2013
IEEE 802.11a WLAN model
IEEE 802.11a WLAN physical layer model, with demonstration of adaptive modulation and coding.
commdigbbndam2 library is out-of-date library.
I think Mathworks does not support any more.
You can change each block in new communication library.
But you might not get the correct original parameter value.
Fortunately, this model is included in each Matlab Demo.
You can find it in Help menu.