一种可用于DVB-T的OFDM全数字解调器  

An All-digitized OFDM Demodulator for DVB-T

作　　者：董斌[1] 徐元欣[1] 王匡[1] 仇佩亮[1] 

机构地区：[1]浙江大学信息与电子工程学系,浙江杭州310027

出　　处：《电路与系统学报》2004年第3期35-39,共5页Journal of Circuits and Systems

基　　金：国家"九五"重大科技产业工程项目(96-B06-01-05)

摘　　要：OFDM是一种高效的数据调制方式,被广泛地应用于宽带数字通信领域。DVB-T就将它作为物理层的传输制式。本文提出了一种可用于DVB-T的OFDM全数字解调器。文章首先分析了各种因素对解调的影响,提出了全数字解调器的结构,然后介绍了符号同步、载波同步、时钟同步和信道补偿等模块在解调器中的全数字实现,最后给出了解调器的误码性能。结果表明,本文提出的全数字解调器具有较好的性能。As an effective digital modulation scheme, OFDM is widely used in wideband digital communication systems, such as DVB-T. In this paper, an all-digitized OFDM demodulator for DVB-T is proposed. Based on the analysis of those factors that interfere with demodulation, the architecture of demodulator is presented. Then functional modules that implement digitized demodulator, such as symbol synchronization, carrier synchronization, clock synchronization, and channel compensation, are explained. At the end, the BER performance of the demodulator is given. As the result shows, the all-digitized demodulator has good performance.

关 键 词：数字视频地面广播(DVB-T) 正交频分复用(OFDM) 全数字解调器 

分 类 号：TN94[电子电信—信号与信息处理]