Deep-space communication oriented code-aided carrier phase synchronization system and deep-space communication oriented code-aided carrier phase synchronization method

The invention provides a deep-space communication oriented code-aided carrier phase synchronization system and a deep-space communication oriented code-aided carrier phase synchronization method. The deep-space communication oriented code-aided carrier phase synchronization system comprises a receiving-end unit. The receiving-end unit comprises an LDPC (low-density parity check) decoder, a multiplier, a Costas loop module, a rotational metric function generator and a phase compensator. The deep-space communication oriented code-aided carrier phase synchronization system and the deep-space communication oriented code-aided carrier phase synchronization method have the advantages that a gain per square loss of the system conforms to a theoretical gain, a phase acquisition range of the system is wide as compared with an existing IRCS (information-reduced carrier synchronization) scheme and an EM (expectation-maximization) algorithm, phase deviation within a +/-180-degree range can be correctly estimated, and the complexity is low as compared with a phase deviation search algorithm.