色散补偿技术在有线电视长距离信号传输中的应用研究
|
摘要
我国有线电视近年来发展迅速,有线电视网络遍布全国城乡各地,并和卫星、微波等其它传输方式一起构成了全国性的广播电视传输覆盖网。在国民经济中占有举足轻重地位的广播电视传输网已和电信网一起成为我国信息产业的重要基础设施。数字电视的出现,在世界范围内掀起了一场前所未有的产业技术革命,它带来的不仅是大容量的节目传输、很强的抗干扰能力、高质量的图像声音,更重要的是它使电视机成为人们主动获取信息、相互沟通、娱乐休闲的工具。作为广播电视网重要组成部分的有线电视网因其具有传输频带宽、用户范围广等独特的优点而日益受到重视。传输频带宽的优点使其不仅可传输更多的广播电视节目,还可利用网络的富裕容量在网上开发其他业务。
我国的有线电视网络的建设发展进入了快车道,特别是国家提出三网融合的战略计划和部署,已经在“加快有线电视网络的升级改造,加强网络的多功能开发应用,争取新的经济增长点”上达成共识并予以实施。到目前为止,大、中城市有线电视网络已完成了750MHz或860MHz的HFC本地网络。可是长距离光传输中遇到的因色散带来系统指标下降的问题一直困扰着业务的拓展。
本文首先对基于色散补偿技术的CATV网络的构成、结构以及信号的调制方式作了论述,并根据某区域现有的有线电视网络情况,提出了一套色散补偿网络改造方案。在网络改造方案中充分考虑到了当前及今后一段时间技术进步及各项业务发展,预留出指标的富裕量。论文详细分析了色散补偿在某区域有线电视传输网络中的应用,并且对设计、安装、调试过程中遇到的一些实际问题提出了解决办法。
通过对某区域有线电视网络进行基于色散补偿技术的改造,不仅提高了网络的运行可靠性,提高了服务质量,还可以实现在网上开展多项增值业务,从而充分开发出了网络的经济效益,提升了网络的综合竞争力。
The cable television in China has developed rapidly in recent years. Cable TV network spreads the counties and towns all over the country, which composes national broadcasting TV transmission network with other transmission methods such as satellites and microwaves. The broadcasting TV transmission network which takes an important role in the national economy and the telecommunication network become the important elementary facilities of our national Informantion Industry. The emergence of digital television in the world sets off an unprecedented revolution in industrial technology, it brings not only high-capacity program transmission, a strong anti-interference ability, high-quality image and voice, more importantly is that it makes TV become active access to information, mutual communication, entertainment and leisure tools. As an important component part of the broadcasting television network, the cable television network gets more attention because of its special characteristics such as its wide transmission band, its extensive consumer range. The wide transmission band of the cable television network not only makes it transmit more broadcasting programs but also develops other network service using the network's abundant capacity.
The construction of cable TV network has entered into the fast lane. Especially the strategic plan of the convergence of three networks has already come to consensus and implemented at "speeding up the upgrading of cable TV network, strengthenning multi-functional development and application in the network, striving for the new points for economic growth". So far, most of the cable television networks in the big or medium cities has mainly finished HFC local network(750 MHz or 860 MHz)'s renovation and upgrading. But the problems in the network transportation between the small and medium cities, especially the problem of the descent of the system target because of the dispersion of the light in the long-distance light transmit always assails the development of the network business in the cities and counties.
The thesis first comments on the construction, structure of the CATV network which bases on the technology in the light dispersion and compensation, it also comments on the methods of the signal modulation. Then it introduces a series of the network reforming projects about the dispersion and compensation of light. In the network reforming projects, the writer has the thorough consideration of the technology and other businesses'development in the present and future, and reserves the index opulent amount. The article analyses the application of the light dispersion and compensation in the cities and counties'cable television network and proposes some solutions to some practical problems in the process of design, installment and modulation.
The technological reform of the light dispersion and compensation in the cities and counties'cable television network not only promotes the reliability and service qualities of the network, but also can achieve a number of appreciation business on the network, which fully develop the network economic benefits and improve the network competitive ability.
我国的有线电视网络的建设发展进入了快车道,特别是国家提出三网融合的战略计划和部署,已经在“加快有线电视网络的升级改造,加强网络的多功能开发应用,争取新的经济增长点”上达成共识并予以实施。到目前为止,大、中城市有线电视网络已完成了750MHz或860MHz的HFC本地网络。可是长距离光传输中遇到的因色散带来系统指标下降的问题一直困扰着业务的拓展。
本文首先对基于色散补偿技术的CATV网络的构成、结构以及信号的调制方式作了论述,并根据某区域现有的有线电视网络情况,提出了一套色散补偿网络改造方案。在网络改造方案中充分考虑到了当前及今后一段时间技术进步及各项业务发展,预留出指标的富裕量。论文详细分析了色散补偿在某区域有线电视传输网络中的应用,并且对设计、安装、调试过程中遇到的一些实际问题提出了解决办法。
通过对某区域有线电视网络进行基于色散补偿技术的改造,不仅提高了网络的运行可靠性,提高了服务质量,还可以实现在网上开展多项增值业务,从而充分开发出了网络的经济效益,提升了网络的综合竞争力。
The cable television in China has developed rapidly in recent years. Cable TV network spreads the counties and towns all over the country, which composes national broadcasting TV transmission network with other transmission methods such as satellites and microwaves. The broadcasting TV transmission network which takes an important role in the national economy and the telecommunication network become the important elementary facilities of our national Informantion Industry. The emergence of digital television in the world sets off an unprecedented revolution in industrial technology, it brings not only high-capacity program transmission, a strong anti-interference ability, high-quality image and voice, more importantly is that it makes TV become active access to information, mutual communication, entertainment and leisure tools. As an important component part of the broadcasting television network, the cable television network gets more attention because of its special characteristics such as its wide transmission band, its extensive consumer range. The wide transmission band of the cable television network not only makes it transmit more broadcasting programs but also develops other network service using the network's abundant capacity.
The construction of cable TV network has entered into the fast lane. Especially the strategic plan of the convergence of three networks has already come to consensus and implemented at "speeding up the upgrading of cable TV network, strengthenning multi-functional development and application in the network, striving for the new points for economic growth". So far, most of the cable television networks in the big or medium cities has mainly finished HFC local network(750 MHz or 860 MHz)'s renovation and upgrading. But the problems in the network transportation between the small and medium cities, especially the problem of the descent of the system target because of the dispersion of the light in the long-distance light transmit always assails the development of the network business in the cities and counties.
The thesis first comments on the construction, structure of the CATV network which bases on the technology in the light dispersion and compensation, it also comments on the methods of the signal modulation. Then it introduces a series of the network reforming projects about the dispersion and compensation of light. In the network reforming projects, the writer has the thorough consideration of the technology and other businesses'development in the present and future, and reserves the index opulent amount. The article analyses the application of the light dispersion and compensation in the cities and counties'cable television network and proposes some solutions to some practical problems in the process of design, installment and modulation.
The technological reform of the light dispersion and compensation in the cities and counties'cable television network not only promotes the reliability and service qualities of the network, but also can achieve a number of appreciation business on the network, which fully develop the network economic benefits and improve the network competitive ability.
引文
[1]Yao Wang(美).视频处理与通信.北京：电子工业出版社,2003：213-220.
[2]Lars Gruner-Nielsen,Marie Wandel,Poul Kristensen,Et Al.Dispersion-Compensating Fibers.Journal Of Lightwave Tech.,2005:23(11):3566-3579.
[3]林如俭.光纤电视传输系统.北京：电子工业出版社,2001：463-473,540.
[4]Shlomo Ovadia(美).宽带有线电视接入网.北京：人民邮电出版社,2002：156-160.
[5]S. Tsuji And Y. Hamasaki.250 Km Transmission Of Frequency Multiplexed 64-QAM Signals For Digital CATV Backbone Application.NCTA Tech.Paper, 1998:5:21-29.
[6]杜百川.数字电视.北京：国家广电总局培训中心,1998：123-126.
[7]方宏一.有线电视宽带多媒体网络.北京：中国广播电视出版社,2001：115-120.
[8]陈建设.有线电视系统工程技术实用手册.北京：地震出版社,2002：101-115.
[9]王宝济.网络建设实用指南.北京：人民邮电出版社,1999：89-95.
[10]李鉴增,焦方性.有线电视综合网技术.北京：人民邮电出版社,2002：67-80.
[11]郑雯,翟希山等.数字电视原理传输与接收.北京：人民邮电出版社,2006：113-120.
[12]Chang C.H.,Chen Y.K..Experimental demonstration ofbidirectional lightwave CATV 100 km transmission system using SMF and LEAF links.Electron.Lett., 2000:36(3):243-244.
[13]汪洋.1550nm长距离CATV系统色散补偿技术的研究.上海：上海大学硕士学位论文,2005：45-57.
[14]L.leng,B.Zhu,S.Stulz,et al.1.6/Tbs(40×40 Gb/s) transmission over 500 krn of nonzero dispersion fiber with 100-km amplified spans compensated by extra-high-slope dispersion-compensating fiber.in OFC,2002:ThX2.
[15]Hai-Han Lu.Performance Comparison Between DCF and RDF Dispersion Compensation in Fiber Optical CATV Systems.IEEE Trans,on Broadcasting,2000:48(4)370-373.
[16]马汉良.数字化整体转换.北京：中国广播电视出版社,2006：111-123.
[17]M.C.Wu,C.H.Wang,and W.I.Way. CSO distortions due to the combined effects of self-and-phase modulations in long-distance 1550nm AM-CATV systems", IEEE Photonics Tech. Lett.,1999:12(9) 1255-1257.
[18]Qing Ye,Feng Liu,Haiwen Cai,Ronghui Qu,and Zujie Fang.Analysis of dispersion compensation for position dependence in externally modulated CATV lightwave systems by using chirped fiber grating.Chinese Optics Letters,2005:3(10)566-569.
[19]董天临.光纤通信与光纤信息网.北京：清华大学出版社,2006：215-222.
[20]Laming R.I.,loh W.H.,Cole M.J.,et al.Fiber grating for dispersion compensation.OFC'97 Tech.Dig.,1997:ThA3.
[21]Philips M R,and Ott D M.Crosstalk due to optical fiber nonlinearities in WDM CATV lightwave systems. [J].J Lightwave Technol,1999:17(10):1782-1792.
[22]LiA,M ahon C J,Wang Z,Jacobsen G,and Bodtker E. Experimental confirmation of crosstalk due to stimulated Raman scattering in WDM AM-VSB CATV transmission systems.[J] Electron,1995:31(18):1538-1539.
[23]阿格拉瓦(美).光纤通信系统.北京：清华大学出版社,2007：138-145.
[24]安连生.应用光学.北京：北京理工大学出版社,2000：178-186.
[25]Hai-Han Lu,Wen-Shing Tsai.A hybrid CATV/256-QAM/OC-48 DWDM system over an 80 km LEAF transport.Broadcasting IEEE Transactions on,2003:97-102.
[26]H.H.Lu,K,L,Lee,and P.C.Lai.350 km Transmission of 15-Channel 256-QAM Signals.Journal of Optical Communications,2002:107-110.
[27]Kazuki Maeda,Kuniaki Utsumi.Bit-Error Rate of QAM Signal and Its Analysis Model for Composite Distortions in AM/QAM Hybrid Transmissionl.IEEE Transaction on Communications,1999:1173-1179.
[28]约瑟夫.C-帕勒里斯(美).光纤通信(第5版).北京：电子工业出版社,2005：95-105.
[29]Djafark,Mynbaev(美).光纤通信技术.北京：机械工业出版社,2002：88-118.
[30]赵凯华.光学.北京：高等教育出版社,2004：76-85
[31]邱昆.光纤通信导论.北京：电子科技大学出版社,1995：121-125.
[32]赵梓森.单模光纤通信系统原理.北京：人民邮电出版社,1988：252-255.
[2]Lars Gruner-Nielsen,Marie Wandel,Poul Kristensen,Et Al.Dispersion-Compensating Fibers.Journal Of Lightwave Tech.,2005:23(11):3566-3579.
[3]林如俭.光纤电视传输系统.北京：电子工业出版社,2001：463-473,540.
[4]Shlomo Ovadia(美).宽带有线电视接入网.北京：人民邮电出版社,2002：156-160.
[5]S. Tsuji And Y. Hamasaki.250 Km Transmission Of Frequency Multiplexed 64-QAM Signals For Digital CATV Backbone Application.NCTA Tech.Paper, 1998:5:21-29.
[6]杜百川.数字电视.北京：国家广电总局培训中心,1998：123-126.
[7]方宏一.有线电视宽带多媒体网络.北京：中国广播电视出版社,2001：115-120.
[8]陈建设.有线电视系统工程技术实用手册.北京：地震出版社,2002：101-115.
[9]王宝济.网络建设实用指南.北京：人民邮电出版社,1999：89-95.
[10]李鉴增,焦方性.有线电视综合网技术.北京：人民邮电出版社,2002：67-80.
[11]郑雯,翟希山等.数字电视原理传输与接收.北京：人民邮电出版社,2006：113-120.
[12]Chang C.H.,Chen Y.K..Experimental demonstration ofbidirectional lightwave CATV 100 km transmission system using SMF and LEAF links.Electron.Lett., 2000:36(3):243-244.
[13]汪洋.1550nm长距离CATV系统色散补偿技术的研究.上海：上海大学硕士学位论文,2005：45-57.
[14]L.leng,B.Zhu,S.Stulz,et al.1.6/Tbs(40×40 Gb/s) transmission over 500 krn of nonzero dispersion fiber with 100-km amplified spans compensated by extra-high-slope dispersion-compensating fiber.in OFC,2002:ThX2.
[15]Hai-Han Lu.Performance Comparison Between DCF and RDF Dispersion Compensation in Fiber Optical CATV Systems.IEEE Trans,on Broadcasting,2000:48(4)370-373.
[16]马汉良.数字化整体转换.北京：中国广播电视出版社,2006：111-123.
[17]M.C.Wu,C.H.Wang,and W.I.Way. CSO distortions due to the combined effects of self-and-phase modulations in long-distance 1550nm AM-CATV systems", IEEE Photonics Tech. Lett.,1999:12(9) 1255-1257.
[18]Qing Ye,Feng Liu,Haiwen Cai,Ronghui Qu,and Zujie Fang.Analysis of dispersion compensation for position dependence in externally modulated CATV lightwave systems by using chirped fiber grating.Chinese Optics Letters,2005:3(10)566-569.
[19]董天临.光纤通信与光纤信息网.北京：清华大学出版社,2006：215-222.
[20]Laming R.I.,loh W.H.,Cole M.J.,et al.Fiber grating for dispersion compensation.OFC'97 Tech.Dig.,1997:ThA3.
[21]Philips M R,and Ott D M.Crosstalk due to optical fiber nonlinearities in WDM CATV lightwave systems. [J].J Lightwave Technol,1999:17(10):1782-1792.
[22]LiA,M ahon C J,Wang Z,Jacobsen G,and Bodtker E. Experimental confirmation of crosstalk due to stimulated Raman scattering in WDM AM-VSB CATV transmission systems.[J] Electron,1995:31(18):1538-1539.
[23]阿格拉瓦(美).光纤通信系统.北京：清华大学出版社,2007：138-145.
[24]安连生.应用光学.北京：北京理工大学出版社,2000：178-186.
[25]Hai-Han Lu,Wen-Shing Tsai.A hybrid CATV/256-QAM/OC-48 DWDM system over an 80 km LEAF transport.Broadcasting IEEE Transactions on,2003:97-102.
[26]H.H.Lu,K,L,Lee,and P.C.Lai.350 km Transmission of 15-Channel 256-QAM Signals.Journal of Optical Communications,2002:107-110.
[27]Kazuki Maeda,Kuniaki Utsumi.Bit-Error Rate of QAM Signal and Its Analysis Model for Composite Distortions in AM/QAM Hybrid Transmissionl.IEEE Transaction on Communications,1999:1173-1179.
[28]约瑟夫.C-帕勒里斯(美).光纤通信(第5版).北京：电子工业出版社,2005：95-105.
[29]Djafark,Mynbaev(美).光纤通信技术.北京：机械工业出版社,2002：88-118.
[30]赵凯华.光学.北京：高等教育出版社,2004：76-85
[31]邱昆.光纤通信导论.北京：电子科技大学出版社,1995：121-125.
[32]赵梓森.单模光纤通信系统原理.北京：人民邮电出版社,1988：252-255.