不同数字电视地面广播传输系统在多径衰落信道下的性能比较  

Performance Comparison of Digital Television Terrestrial Broadcasting Transmission Systems over Multipath Fading Channels

作　　者：郑紫微[1] 杨知行 朱义胜[2] 潘长勇[1] 

机构地区：[1]清华大学电子工程系微波与数字通信国家重点实验室,北京100084 [2]大连海事大学信息工程学院,辽宁大连116026

出　　处：《电子学报》2004年第3期425-428,共4页Acta Electronica Sinica

基　　金：国家自然科学基金 (No .50 1 770 0 1 );国家"九八五"项目;信息产业部电子信息产业发展基金 (No .2 0 0 2 2 91 )

摘　　要：本文分析了数字电视地面广播通信信道具有长脉冲响应的多径衰落的特点 ,从频域上表达了其多径衰落信道模型 ;基于单载波和多载波两种不同的传输模式 ,推导了数字电视地面广播传输系统在该多径衰落信道下的系统截止率和中断概率的表达式 ;The characteristics of the digital television terrestrial broadcasting (DTTB) channels with long impulse responses are analyzed, and the frequency domain multipath channel model is given. Based on single carrier and multicarrier these two different transmission modes, the cutoff rate expressions and the outage probability expressions of the DTTB transmission systems are derived. The performance of different DTTB standards-based or schemes-based transmission systems over DTTB multipath fading channels are compared both analytically and by computer simulations.

关 键 词：数字电视地面广播传输系统 频域多径信道模型 截止率 中断概率 多径衰落信道 

分 类 号：TN934.3[电子电信—信号与信息处理] TN949.197[电子电信—信息与通信工程]