Non-linear channel compensation method for OFDM under fast fading channel

In a recent year, a high data rate and a high quality multimedia services are demanded. To meet this demand, orthogonal frequency division multiplexing (OFDM) is attractive and widely studied. In an OFDM system, the channel estimation (CE) is very important. However, since the channel is rapidly varied, many errors occur in the last part of the packet in the fast fading environment. To mitigate this problem, the joint direct and linear prediction method has been proposed. However, this method shows the large number of errors in the last part of the packet by using the linear prediction. To overcome this problem, in this paper, we propose the non-linear prediction method to compensate the channel variance in the last part of the packet.