Carrier Frequency Offset-Based OFDM Synchronization Technology

To meet the demand of high speed and reliability, the key performance of mobile communication has higher requirements for different application scenarios. According to the 3rd Generation Partnership Project protocol, the 5th generation (5G) mobile communication technology still adopts Orthogonal Frequency Division Multiplexing (OFDM) technology in spectrum transmission. The wireless channel fading, noise interference and Doppler effect will cause data loss in signal transmission, so the research of synchronization technology has more practical significance for signal transmission in complex environment and limited bandwidth resources. This paper investigates Carrier Frequency Offset (CFO) synchronization technology in OFDM, analyzes CFO from time domain and frequency domain, and simulates CFO synchronization technology based on OFDM with MATLAB. The simulation results show that the received signals’ signal noise ratio (SNR) of increases, the mean square error (MSE) estimated by CFO decreases, and the MSE estimated by CFO is also different when the phase difference between the two repeat leads is changed.