Link-level performance of satellite DMB system a considering frequency & timing synchronization error and HPA non-linearity

초록

The DAB (Digital Audio Broadcasting) system which is based on Eureka-147 employing COFDM (Coded Orthogonal Frequency Division Multiplexing) technique is evolved into DMB (Digital Multimedia Broadcasting) system that is categorized into Terrestrial DMB and Satellite DMB. The Satellite DMB is multi-channel multimedia broadcasting service for the reception by the portable or vehicular receiver. Link level performance of Satellite DMB System A considering the sensitivity of HPA non-linearity has been analyzed in this paper. We choose the appropriate value of HPA back-off to reflect major practical RF impairment. We also investigated time and frequency synchronization techniques, which were suitable for Satellite DMB system A. Finally, we verified the overall link level performance considering the above RF impairment and frequency offset.