Two-state Viterbi detection system and method

The present invention provides a two-state Viterbi detection system and method. The system comprises a time domain to frequency domain conversion module for converting an inputted time domain sample point signal into a frequency domain sample point signal, a difference judgment module for obtaining a judgment bit and a judgment variable, a phase error calculation module for calculating errors to obtain judgment error variables, a frequency domain two-state Viterbi module for carrying out the combined detection of the multiple judgment error variables and obtaining corrected judgment error variable values, a cache module for storing the judgment bit so as to match the processing time delay introduced by the frequency domain two-state Viterbi module, and a judgment bit correction module which corrects the judgment bit by using the corrected judgment error variables. The system and the method have the advantages that good detection performance can be obtained, the system complexity can be reduced, and the system