WLAN stands for Wireless LAN.
There are many WLAN standards evolving as series of IEEE 802.11 standards viz. 11a,11b,11g,11n,11ac,11ad and so on.
I will provides downloadable link to 11a OFDM physical layer matlab and simulink source codes.
OFDM Simulink Model
11a physical layer article for complete physical layer modules of WLAN OFDM physical layer.
The simulink model is implemented as per 64 point FFT.
This FFT composed of 52 data , 4 pilot carriers, 1 DC and rest of guard carriers.
MATLAB WLAN OFDM Model Code
The matlab source code zip file can be downloaded from following link with all the finctions
https://swim-eu.com/wp-content/uploads/2023/05/wireless-matlab-0.5.zip
Also Refer following link to download simulink model source code directly from MATLAB
https://www.mathworks.in/matlabcentral/fileexchange/3540-ieee-802-11a-wlan-model
IEEE 802.11n source code can be downloaded from following link
https://www.mathworks.in/matlabcentral/fileexchange/26232-ieee-802-11n-wlan-file-update