Abstract:

The frequency offset of the broadband orthogonal frequency division multiplexing (OFDM) system will lead to inter-carriers interference (ICI) in high mobile environment. Based on the analysis of the frequency offset causing ICI, a new effective self-cancellation scheme for mitigating ICI is proposed, which connects with the conjugate solution and the optimized coefficients. Simulation results show that the new scheme can acquire higher carrier-to-interference ratio (CIR) and lower bit error rate (BER) in a wide range of frequency offset, and can validly remove the “error floor”, and obtain the performance improvement.