A COMPARATIVE STUDY ON SYNCHRONIZATION ALGORITHMS FOR VARIOUS MODULATION TECHNIQUES IN GSM

The study on various modulation techniques implemented in GSM is the main area of interest to address the problem of estimating synchronization parameters. On estimation of synchronization parameters, a robust synchronization algorithm can be developed for GSM standards. Later in this paper a fast synchronization algorithm for Gaussian Minimum Shift Keying (GMSK) modulation technique is proposed for GSM in mobile devices. GM SK is the spectrally efficient modulation technique with constant envelope property. This synchronization algorithm for GMSK results in low complexity and low signal-to-noise ratio (SNR) for GSM standards. Symbol-by-symbol (SBS) demodulator is used for demodulating GMSK in GSM wh ich can outperform the traditionally high complexity Viterbi Algorithm, but SBS assumes perfect synchronization in designing the demodulator. The proposed method will extend to practical scenario by considering imperfect synchronization caused by synchronization algorithm s at the receiver.