Optimization of synchronization method at low SNR in GSM systems

In order to optimize the synchronization algorithm under the low signal-to-noise ratio(SNR) environment in a global system for mobile communication(GSM)system,the improved Gaussian-filtered minimum shift keying(GMSK) modulation signal synchronization algorithm was adopted to obtain the comparison chart of signal synchronization success rate.At the receiving end the phase of GMSK was reversed first,symbolized,and be processed by synchronization algorithm with slide-relative synchronous progress.The results show that the synchronization algorithm has a higher success rate than the traditional algorithm based on the sliding of the training sequence,which can not only improve the synchronization success rate significantly in the low SNR,but also simplify the threshold calculation process.This result means a great significance to the signal modulation in the low SNR environment.