摘要
本文通过对DTMB数字电视地面广播标准GB20600-2006的研究,从信号体制的角度论述了DTMB系统用于授时的可行性,并且从DTMB授时原理、帧头PN模式辨识和帧头检测三个方面阐述了DTMB授时的关键技术,最后对DTMB作为授时服务系统存在的若干问题进行了探讨,并给出了初步解决方案。
This paper studies the digital television multimedia broadcasting standard GB 20600-2006 firstly.Through the study,the feasibility of DTMB system in time service is discussed from the perspective of the signal system.Then some key technologies of DTMB timing are elaborated from timing principle,frame head PN mode identification,and frame detection.Finally,some problems of the DTMB worked as a time service system is discussed,and corresponding initial solutions are presented.
