A Novel ICI Self-Cancellation Scheme for OFDM Systems

Orthogonal frequency division multiplexing (OFDM) is a promising technique for fourth-generation (4G) broadband wireless communication systems. However, it suffers from intercarrier interference (ICI) due to its sensitivity to the frequency offset caused by Doppler frequency drift. In this paper, we investigate the self-cancellation techniques to mitigate ICI for OFDM systems and a novel ICI self-cancellation scheme is proposed to mitigate the ICI effects. The performances of ICI self-cancellation schemes are analyzed in terms of the carrier-to-interference ratio (CIR) and bit error rate (BER). Simulation results demonstrate that the proposed ICI self-cancellation scheme outperforms other existing self-cancellation methods and robustness to large frequency offset.