地面数字电视广播系统的研究

Terrestrial Digital TV Broadcast System Research

本文主要介绍了地面数字电视广播(Digital Television Terrestrial Broadcasting,DTrB)系统,在介绍国外现有的DTIB传输标准的基础上说明清华大学数字电视传输技术研发中心提出的DMB-T(Terrestrial Digital Multi- media/Television Broadcasting)标准。DMB-T系统采用了时域同步正交频分复用(TDS-OFDM)的多载波调制方式,适用于具有多径干扰和多普勒频移的地面数字电视广播传输信道。通过比较,DMB-T具有新的关键技术和优越的性能。

Digital Television TelTestrial Broadcasting （DTTB） system is introduced in this paper. Based on the introduction of DTIB transmission standards abroad, DMB-T . presented by Digital Television Research and Develop center of Tsinghua University, has been proposed. DMB-T system uses TDS-OFDM modulation, which is suit for digital television telTestrial transmission channels with multi-paths delay and doppler shift. DMB-T system has new key technology and better performance by compared.