Abstract: With the development of satellite communication services,satellite broadband high-speed data communication is becoming more and more important,higher order modulation technology is increasingly used in satellite communications,but the carrier frequency offset the impact of higher order modulation signals,such as APSK．its various amplitudes also make carrier synchronization more complicated．Review carrier synchronization algorithm theory based on the carrier frequency and phase deviation APSK signal system,and to study the carrier frequency and phase offset estimation algorithm,analysis shows that the algorithm can effectively solve the APSK signal multi-amplitude and phase Fuzzy large problems,and can be preferably applicable to the the APSK signal carrier frequency and phase synchronization.

Key words: Carrier synchronization,APSK,Phase ambiguity,NDA algorithm,DDA algorithm