Carrier synchronization method for MPSK satellite communication system

The invention relates to a carrier synchronization method of an MPSK satellite communication system, which comprises the following steps of: acquiring two sections of MPSK digital baseband signals, respectively performing M power operation on each section of MPSK digital baseband signal to obtain two sections of unsigned modulation digital signals, M being the number of phases of the MPSK digital baseband signals; calculating unambiguous phase estimation values of the two segments of unsigned modulation digital signals, and respectively recording the unambiguous phase estimation values as a first unambiguous phase estimation value psi 1 and a second unambiguous phase estimation value psi 2; according to the relationship between the first unambiguous phase estimation value psi 1 and the second unambiguous phase estimation value psi 2 and the carrier frequency offset and the carrier phase of the MPSK digital baseband signal, establishing a binary linear equation set, and resolving the binary linear equation set