Frequency offset tracking algorithm for orthogonal frequency-division multiplexing systems using a pilot sub-carrier

To improve the estimation precision of the carrier frequency offset in a multi-path fast fading environment,the performance of the frequency offset tracking algorithm using a pilot sub-carrier was studied extensively.Comparing with the frequency offset tracking algorithm based on a cyclic prefix,a frequency offset tracking algorithm using a pilot sub-carrier can not only derive better frequency offset tracking performance in the AWGN channel,but also obtain exact frequency offset estimation in multi-path fast fading channels.The algorithm using a pilot sub-carrier therefore is more suitable for frequency offset tracking in the multi-path fast fading channels.