OFDM技术在数字电视地面传输系统中的应用

Application of Communication Technology in Digital Television Terrestrial Transmission System

数字广播是广播电视体系的重要组成部分,地面数字电视广播(Digital Video Broadcasting-Terrestrial,DVB-T)与地面数字多媒体广播(Digital Terrestrial Multimedia Broadcast,DTMB)之间的调制技术有所差异,DTMB采用的是同步正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)调制技术,不会出现信号不好、图像质量问题,还能够提升无线频谱的利用效率,即使在移动的情况下也能够接收到稳定的信号。主要对OFDM技术在数字电视地面传输中的应用进行了研究,旨在推动数字电视在新时代的高质量发展。

Digital broadcasting is an important part of broadcasting and television system.There are differences in modulation technology between Digital Video Broadcasting-Terrestrial(DVB-T)and Digital Terrestrial Multimedia Broadcasting(DTMB).DTMB adopts Orthogonal Frequency Division Multiplexing(OFDM)modulation technology,which will not cause bad signal and image quality problems,and can also improve the utilization efficiency of wireless spectrum,and can receive stable signals even when moving.The application of OFDM technology in digital TV terrestrial transmission is studied in order to promote the high-quality development of digital TV in the new era.