Expanded Time-Frequency OFDM and its interference suppression techniques

An approach to interference suppression in an expanded time-frequency OFDM (ETF-OFDM) system is presented in this paper. Because of the special structure, the ETF-OFDM system inherently suppresses variously co-existing interference simultaneously, such as single tone interference, narrow band interference, and short-time pulse burst interference, to a certain extent. We can obtain an improved performance with simple interference suppression methods which fit in the system and involve low complexity. Simulation results prove that under the same simulation conditions, the ETF-OFDM system outperforms the MC-CDMA system with the same interference suppression methods in presence of the same interference.