Survey on Intercarrier Interference Self-Cancellation Techniques in OFDM Systems
Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier modulation technique which divides the available spectrum into many carriers. Efficient spectrum usage makes it most desirable candidate for high data rate transmission. However the major drawback is its sensitivity to CFO which causes Inter Carrier Interference (ICI). This ICI causes severe degradation of the Bit Error Rate (BER) performance of the OFDM receiver. There are numerous techniques for reducing ICI including time domain windowing, frequency domain equalization and ICI self-cancellation, but the simplest one is self-cancellation. In this paper the two ways for ICI self-cancellation data conversion and data conjugate are described and the comparisons are made.