地面数字电视广播的信道估计算法

Channel Estimation Methods of Digital Television Terrestrial Broadcasting

本文在简介地面数字电视广播（Digital Television Terrestrial Broadcasting,DTTB的发展及其信道特点的基础上,描述了国外现有的DTTB传输标准和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 Broadcasing）所采用的信道估计算法,并对以上信道估计性能进行比较,证明DMB-T信道估计算法受高斯噪声和时变信道估计的影响更小,而且算法实现更简单.

The development of the Digital Television Terrestrial Broadcasting (DTTB) and channel characters of the DTTB are first described, and the channel estimation method for the DMB-T (Terrestrial Digital Multimedia/Television Broadcasting) standard innovated by Digital TV R and D Center of Tsinghua University is then discussed in details. Comparing with other existing international standards of DTTB, we conclude that the channel estimation for DMB-T has advantages of low computational complexity and significant suppression of channel noise.