一种应用于数字电视地面广播的信道编码调制方法

北京邮电大学学报 ›› 2004, Vol. 27 ›› Issue (2): 72-73.

一种应用于数字电视地面广播的信道编码调制方法

韩猛¹, 门爱东², 潘长勇¹, 杨知行¹

1. 清华大学电子工程系, 北京100084;
2. 北京邮电大学电信工程学院,北京100876

收稿日期:2002-12-10 出版日期:2004-02-28
作者简介: 韩猛(1972—),男,博士生。 E-mail:hanmengoo@mails.tsinghua.edu.cn
基金资助:
高等学校优秀青年教师科研奖励计划资助项目

A Novel Channel Coding and Modulation Scheme Adopted
in the Digital Television Terrestrial Broadcasting

HAN Meng¹, MEN Ai-dong², PAN Chang-yong¹, YANG Zhi-xing¹

1.Dept. of Electronics Engineering, Tsinghua University, Beijing 100084, China;
2.Telecommunication Engineering School, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2002-12-10 Online:2004-02-28

摘要/Abstract

摘要： 提出了一种应用于数字电视地面广播(DTTB)的新的编码调制方案。首次以多级分组乘积码代替传统的串行级联编码结构,提高了频谱效率;同时采用一种多分辨率64QAM星座图,可在一个DTTB信道中提供3种级别的服务。在接收端采用基于MAX-LOG-MAP准则的迭代Turbo译码算法以获得可靠接收。仿真结果表明,在视觉门限BER=3×10^-6处,高优先级码流的比特信噪比约为7 dB,适用于高可靠性的服务。中优先级和低优先级码流可支持室外固定接收。

关键词: 数字电视地面广播, 地面数字多媒体/电视广播协议, 分组乘积码, 分级调制

Abstract: A new channel coding and modulation scheme adopted in Digital Television Terrestrial Broadcasting (DTTB) is presented, in which multilevel Block Product Code (BPC) is for the first time introduced to replace the serially concatenated codingarchitectures to improve spectrum efficiency and a multi-resolution 64QAM constellation is used for hierarchical modulation to offer three tiers of services within one DTTB channel. In the receiver, an iterative turbo decoding algorithm based on MAX-LOG-MAP criterion is adopted to achieve robust reception. Simulation shows that the bit SNR of High Priority stream is about 7 dB at the Thresholdof Visibility, which is competent for services requiring high reliability. TheMedium and Low Priority streams can support fixed outdoor reception.

Key words: DTTB, DMB-T, BPC(block product code), hierarchical modulation

中图分类号:

TN941.3

韩猛, 门爱东, 潘长勇, 杨知行. 一种应用于数字电视地面广播的信道编码调制方法[J]. 北京邮电大学学报, 2004, 27(2): 72-73.

HAN Meng, MEN Ai-dong, PAN Chang-yong, YANG Zhi-xing. A Novel Channel Coding and Modulation Scheme Adopted
in the Digital Television Terrestrial Broadcasting
[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2004, 27(2): 72-73.