A residual frequency offset estimation algorithm with uncertainty factor

A new frequency offset estimation algorithm is presented that uses an indicator of the channel status called the uncertainty factor (UF). The UF is calculated for the packet of interest and used to determine if the frequency offset estimate should be updated. If so, then a number of temporary frequency offset estimates are averaged together to obtain the final frequency offset estimate. Computer simulations show that the UF is inversely proportional to the SNR and CIR, and proportional to the frequency selectivity and Doppler frequency of the channel. The new frequency offset estimation algorithm is shown to significantly outperform conventional methods