Phase-noise suppress scheme for DTMB system

Abstract:

To improve the phase noise immunity of Chinese Digital Terrestrial/Television Multimedia Broad-casting ( DTMB) system,a time domain CPE ( Common Phase Error) correction scheme utilizing PN sequence which was filled in the guard interval of DTMB signal frame,and a decision aided ICI ( Inter-Carrier Interference) eliminating scheme which used Transmission Parameters Signaling ( TPS) in DTMB signal frame,were proposed. Simulation results showed that the proposed schemes can eliminate the ICI and CPE,which were caused by phase noise of receiver local oscillator,and improve the symbol error rate. In addition,the time domain CPE correction scheme exhibits excellent performance in strong noise and interference environment.