Method for device of carrier exalting and compensating in frequency spreading communication system

The present invention relates to a method for defining and tracking carrier shift in spread spectrum communication system and its equipment. It includes the follwong steps: firstly, using multiplier to remove carrier frequency from received digital spread-spectrum signal; then using spreading-removing device to remove PN code sequence; using carrier shift assessor to make conjugate multiplicationof two elements with preset space in the all sample pairs of digital spread-spectrum signals to obtain a series of results containing phase change; those resultes are processed by average and normalizing treatment to obtain carrier shift assessed, then making carrier recovery and regulation of transmission signal carrier frequency so as to make user terminal accurately and quick track carrier frequency of base station. Its equipment is implemented on PSP platform by means of software.