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1前言上海交通大学的ADTB-T系统的设计是“满足需求、技术先进、自主产权、便于生产和使用”。ADTB-T系统在传承了单载波体系大量技术优势的基础上,攻克了单载波技术不支持移动接收和单频网组网的世界性技术难题,从而形成一个国际领先的技术方案。ADTB-T技术是单载波技术的典范,在关键技术上有诸多创新,如:基于时域同步,时域信号处理,时域或/和频域滤波;时域PN序列同步;时域信号处理(载波恢复,时钟恢复,相位跟踪,信道估计,信道均衡;时域或/和频域滤波);单载波时域均衡/和单载波频域均衡。2)简洁、高效的数据结构。3)先进的信道编码(Turbo product code).4)低阶调制(4OQAM,16OQAM,32OQAM)5)突破了单载波数字电视移动接收。专家鉴定为该领域国际领先,获得2003年国家科技进步二等奖。6)不利用外部时钟信息(如GPS或其他替代物)实现了单频组网,保证了系统应用的安全性。
1 Introduction Shanghai Jiaotong University ADTB-T system design is “to meet the demand, advanced technology, independent property rights, ease of production and use.” Based on the large number of technical advantages of the single-carrier system, the ADTB-T system overcomes the worldwide technical challenges that the single-carrier technology does not support mobile reception and single frequency network networking, and thus forms a leading international technology solution. ADTB-T technology is a model of single-carrier technology and has many innovations in key technologies such as time domain synchronization, time domain signal processing, time domain or / and frequency domain filtering, time domain PN sequence synchronization, time domain signal processing (Carrier recovery, clock recovery, phase tracking, channel estimation, channel equalization; time domain or / and frequency domain filtering); single carrier time domain equalization / and single carrier frequency domain equalization. 2) concise, efficient data structure. 3) Advanced channel coding (4) Low order modulation (4OQAM, 16OQAM, 32OQAM) 5) Breakthrough of single-carrier digital TV mobile reception. Expert appraisal is the international leader in this field and won the second prize of National Science and Technology Progress Award in 2003. 6) The use of external clock information (such as GPS or other alternatives) to achieve a single-frequency networking, to ensure the safety of system applications.