Code Orthogonal Frequency Division Multiplexing (COFDM) is a multi-carrier digital communication modulation technology.Its basic principle is to divide a wideband frequency channel into multiple overlapping subchannels for narrowband transmission.Despite of the spectral overlap
the signals on the subchannels can be correctly separated at the receiver side as long as they are orthogonal.This dissertation focuses on the research on the synchronization technology in COFDM communication systems.