Carrier frequency offset synchronization method for the VDE-TER system

An improved carrier frequency offset synchronization method for a VDE-TER system, the method runs in a VDE-TER baseband chip, the VDE-TER baseband chip includes an analog-to-digital conversion module, a modulation and demodulation module, a pulse shaping and matching filter module, a frequency offset synchronization module, and a phase tracking module, when the VDE-TER baseband chip is running, the data is synchronized based on the frequency offset synchronization module and the phase tracking module, and then the data is demodulated based on the demodulation module;

• the method includes the following steps:
• matching and filtering the data at a receiver of the system, and extracting a training sequence from an information data segment after matching and filtering;
• performing a carrier frequency offset estimation based on the training sequence to obtain a frequency offset estimated value;
• based on the frequency offset estimated value, performing a frequency offset compensation on the information data segment to obtain a first-level compensation data segment;
• performing a phase tracking on the first-level compensation data segment to obtain a cumulative phase compensation value, thereby obtaining a second-level compensation data segment;
• and
• demodulating the second-level compensation data segment to obtain the received information after synchronization.