A Novel Joint Estimation Algorithm of Timing and Carrier Frequency Offset

A novel joint estimation algorithm of timing and carrier frequency synchronization for orthogonal frequency division multiplexing(OFDM) systems is presented.Only one training symbol is used for symbol timing and carrier frequency offset estimation,the overhead is small.Timing synchronization and carrier frequency synchronization are achieved in time domain,thus the complexity of synchronization is reduced.As autocorrelation is used,timing estimation is robust against carrier frequency offset.Compared with the existing OFDM system timing synchronization algorithms,the presented algorithm avoids the phenomenon of plateau or multpeak in timing metric.Even for very low single-to-noise ratio(SNR),a peak pulse can be present in timing metric while the presented algorithm is used.Simulations show that the algorithm can estimate the timing offset and frequency offset quickly and exactly.