A timing and frequency offset estimation scheme for OFDM systems by using an analytic tone

摘要

O uses OFDM (OFDM) timing and frequency offset estimation method is estimation calculating timing offset estimation and the frequency offset analytic tone (analytic tone) for. Analytic tone has a constant and the phase rotation a predetermined size characterized as a signal that contains only one sub-carrier. Oh estimation algorithm using the analytic tone is based on the correlation function. In correlation by changing the distance between the two samples, the maximum estimation range for frequency offset can be extended to ± N / 2 subcarrier spacing. Here, N is the total number of sub-carriers. Thus, the frequency synchronization method in the OFDM system becomes simpler than the conventional frequency synchronization method of OFDM systems which require separate fine and coarse synchronization sync has a wider estimating range.