DISPERSION COMPENSATION METHOD AND DEVICE

摘要

A method and device for dispersion compensation comprising: a transmitter inserting pilot information on Npilot (Npilot > 1) orthogonal frequency division multiplexing (OFDM) symbols causing the pilot information to be carried on a sub-carrier of the same frequency; a receiver extracting the pilot information from the Npilot OFDM symbols, calculating the phase of each pilot information, then calculating the dispersion phase of the pilot information on the basis of the phase of each pilot information; on the basis of the relationship between dispersion phase frequency and sub-carrier frequency, using the dispersion phase of the pilot information to calculate the dispersion phase of each sub-carrier in the OFDM symbol, and performing compensation for the dispersion phase. The present solution enables the dispersion compensation of high-speed fiber optic communication, reducing training overhead for dispersion compensation to 1/Nsc of the overhead of a traditional dispersion compensation processing solution, where 1/Nsc is the number of sub-carriers carrying data within an OFDM symbol.