In Orthogonal Frequency-Division Multiplexing (OFDM) the spectrum or channel is divided into a set of mutually orthogonal subcarriers, which are used to modulate the data to be transmitted. In Multiuser OFDM the subcarriers may be assigned to different communication paths where the spectrum are divided into blocks of subcarriers for each path.
Figure: Multiuser Cooperative Radio Scenario. The communication path may be either directly from base station to mobile station or data can be relayed through other mobile
Stations to get to the destination.
In OFDM the Discrete Fourier Transform (DFT) and it’s inverse counterpart plays a significant role, as …