Blind Synchronization Arithm For MIMO Systems

With the widely application of MIMO technology, blind identification of MIMOsignals has became a key research topic. As a prerequisite for the follow-up blindchannel estimation, blind coding identification, blind signal demodulation and otherkey technologies, the work on blind synchronization is of great value and significance.Aiming at blind synchronization techniques, the MIMO system and space timecode is introduced, then the Unfixd Window Maximum Likelihood, UWML algorithmbased on the training sequence is proposed. Simulation results show that UWML couldachieve time synchronization and coarse frequency synchronization.To improve the frequency synchronization performance, frequencysynchronization based on space time redundancy is explored, the method of MaximumLikelihood and Second Order Solution are successively discussed before the spacetime code parameter, STCP algorithm is proposed. STCP could achieve finefrequency synchronization without needing channel information or code information.Simulation shows that STCP is superior to sliding correlating algorithm.