Weighted Semi-Blind Channel Identification by Cross Relation Method
Mohamed Tahar Taba, Smain Femmam · American Journal of Applied Sciences · 2009
Problem statement: The bandwidth efficiency of many communication systems could be improved if the transmission channel was estimated blindly without resort to training sequences.GMSK was a spectrum-efficient modulation scheme and it was adopted as the modulation standard of GSM systems.Approach: However, because of its phase modulation, Gaussian filtering and partial response signalling properties, Results: The simulation results showed great potential of semi-blind identification algorithms, since we used no extra antenna or over-sampling the received signal.Conclusion: GMSK was not a linear modulation.Linear approximation of the GMSK signal made the blind equalization system model applicable for GSM.In the sequel, a linear approximation of GMSK signals was presented and a blind GSM and semi-blind channel identification algorithm based on the cross relation method was suggested.