SYNCHRONIZATION SCHEMES USING SUPERIMPOSED TRAINING FOR MOBILE DVB-T SYSTEMS IN HIGH SPEED

In the conventional synchronization schemes based on pilot and the guard intervals, frame synchronization couldn't been achieved for DVB-T with high mobile speed. Two novel frame synchronization schemes based the training sequence/Barker code with very lower power were proposed and compared for European DVB-T 2K systems to improve the mobile performances. Both the estimators here designed to achieve better frame synchronization in Rayleigh fading channels with mobile speed 150 km/h, especially where the second scheme could achieve 99.9% correct frame synchronization probability with SNR 5dB. Simulation results also showed that the superimposed training sequence/Barker code had a significantly smaller effect on system performance. Obviously, the proposed schemes are much better than the conventional schemes.