The performance of a blind carrier frequency offset tracking algorithm for OFDM systems

The performance of a carrier frequency offset blind estimation algorithm for OFDM systems, based on time domain signal reconstructed by data after decision and channel estimation, has been investigated deeply in this paper. It is found that the performance of this algorithm not only varies with the additive white Gaussian noise and carrier number, but also varies with channel estimate error and subcarrier modulation scheme. The four factors that affect the estimate accuracy and tracking performance are analyzed theoretically, and their effects are validated by simulation.