Research on offset compensation of OFDM system based on Synchronization Algorithm

OFDM technology mainly relies on the orthogonality of sub-carriers to achieve stable and efficient data transmission. Once the orthogonality of sub-carriers is affected, it will directly affect the communication effect of the entire system. In order to solve the above problems, this paper uses improved timing synchronization algorithm, carrier frequency synchronization algorithm and sampling frequency synchronization algorithm to compensate three kinds of deviations in OFDM system: timing deviation, carrier frequency deviation, and sampling frequency deviation. Finally, the simulation results show that after all synchronization is completed, when the signal-to-noise ratio is 14dB, the bit error rate reaches 0.18; when Eb/N0 = 12dB, the demodulation error is 0 and the bit error rate is 0, which greatly reduces the OFDM system. The impact of the medium deviation problem.