Hello, I try to simulate an Ad-Hoc network on NS2. First of all, I try to introduce a OFDMA into NS2.
OFDMA (Othogonal Frequency Division Multiple Access) is beging considered as a Multiuser-OFDM and as a multiple access method. OFDMA provides multiplexing operation of data streams from multiple users onto the downlink sub-channels and uplink multiple access by means of uplink sub-channels. In OFDMA, both time and/or frequency resources are used to seperate the multiple user signals. Il allows for partitioning the time and frequency resources into : OFDM symbols, s=1,...,S (in time dimension) OFDM subcarriers, n=1,...N (in frequncy dimension) Each user is allocated a number of OFDM symbols and subcarriers exclusively. I don't know how to start ??? I try to find solutions of allocation of different subcarriers to different user. Please help me. Thank you at all in advance. Soumaya. --
