The Correction Algorithm for Residual Frequency in All-digital Receiver

This paper is concerned with the carrier residual frequency offset,which may drag down the system performance owing to its incomplete estimation during the carrier frequency offset estimation in the all-digital receiver.On the basis of the analysis and study of the relationship between residual frequency offset and residual phase offset,the paper proposes an algorithm of mean square error feedback in few time for carrier residual frequency offset correction.By use of residual phase calculated during the feedback time,the proposed algorithm directly correct the phase of incoming received data.Simulations show that after applying the algorithm to correct residual frequency offset,the system performance is enhanced to some extent.