First of all, OFDMA, also referred to as Multiuser-OFDM, is being considered as a modulation and multiple access method. OFDM is a digital modulation technique and not a multi user channel access technique. OFDMA allows multiple users to transmit simultaneously on the different subcarriers per OFDM symbol.
So, I am considering to introduce OFDMA in NS2. NS2 stands for Network Simulator. It's a discrete event simulator for networking research. It work at packet level. The language used onto NS2 is C++ &Tcl.
With OFDMA, the whole bandwith is made up of N subcarriers in the direction frequency, and organized into several sub-channels and S time slots in the direction time.
I look for solutions or examples of simulation of this technique in NS2.
Thanks.