A joint time-frequency domain algorithm for carrier frequency estimation

To solve the problem that both the estimation range and estimation accuracy cannot be satisfied at the limited pilot overhead for data-aided carrier synchronization in burst signals, a new joint time-frequency carrier frequency offset estimation algorithm is proposed. The basic idea of the algorithm is combining the advantages of wide estimation range of frequency-domain estimation algorithms and high estimation accuracy of time-domain estimation algorithms. Firstly, the coarse frequency offset is estimated by frequency-domain periodogram peak, then the remaining frequency offset is estimated by the summation of the entire time cross correlation. System parameters design needs trade-off between the error performance requirement and system complexity. Simulation results show that the algorithm has high estimation accuracy within the estimated range of 50% of the symbol rate, and it has low complexity which is suitable for short burst communication systems.