ICI Mitigation Schemes for Uncoded OFDM over Channels with Doppler Spreads and Frequency Offsets - Part I: Review

Orthogonal frequency-division multiplexing (OFDM) suffers from inter-carrier interference (ICI) if the channel has the Doppler spread and/or frequency offset. Polynomial cancellation coding (PCC), symmetric cancellation coding (SCC), and windowing are simple, but effective, schemes to mitigate the ICI in the OFDM system without error-correcting coding. In this two-part paper, we derive approximations to the signal-to-interference plus noise power ratio (SINR) attainable by PCC, SCC, and windowing and compare their performances in terms of SINR. To this end, in this first part, we review these known schemes and discuss some of interrelationships between them.