Analysis on the Technologies of Eliminate Interferences in OFDM System

Orthogonal frequency division multiplexing (OFDM) has received more and more attention and has been applied to IEEE 802.11 wireless LAN.Usually a cyclic prefix was applied in OFDM system. In this paper,the process of cyclic prefix to eliminate interferences were analysed by considering the Channel to signal function,its simulation result was also given. The results show that adding the prefix cycle can effectively eliminate inter-symbol interference (ISI) and inter-carrier interference (ICI).