Channel estimation based on coded pilot for OFDM

The multipath fast frequency selective fading channel is estimated using coded pilot, based on DS-SS, for orthogonal frequency division multiplexing (CP-OFDM). The effect of the channel is equalized using channel inversion and channel estimation with maximum likelihood sequence estimation (CE-MLSE). The performance of unfaded coded pilot OFDM is derived for AWGN. The performance of channel inversion and CE-MLSE are simulated for multipath fast fading channels. The coded pilot estimation occurs at the same instant that the signal undergoes the fading effect which makes it suitable for fast fading channels.