有线数字电视市县联网光纤环网系统的设计与实践  

Design and Practice of Cable Digital TV Optical Fiber Ring Network in Cities and Counties

作　　者：李必虎 刘宇[1] 汪锐[1] 关坤[1] 储昭晖[1] 

机构地区：[1]安徽广电信息网络股份有限公司,安徽合肥230088

出　　处：《中国有线电视》2009年第10期1051-1056,共6页China Digital Cable TV

摘　　要：通过对基于DVB-C 1 550 nm长距离模拟单向光纤传输系统改造为自愈性环网的实践,解决了1 550 nm光纤环网工程中遇到的接收点主路与备路信号源QAM频点不一致,接收点光功率变化的控制及接收点主路、备路信号切换控制3个主要问题,说明了1 550 nm光纤环网在有线数字电视市县联网中的广泛应用前景。This paper introduced the transmission from simulated one-way long-distance optical fiber transmission system based on DVB - C 1 550 nm into a self-healing ring network. According to the above practice, the paper solved the three problems. The first one is the QAM frequency point disaccord between acceptance point main road and prepared road signal source; the second is the control of acceptance point optical power; the third is the switching control of acceptance point main road and prepared road signal. Then it described the application outlook of 1550nm fiber-optic ring network in the cable digital TV networking in cities and counties.

关 键 词：有线数字电视市县联网 自愈环 DVB—C 1 550 nm光纤环网 

分 类 号：TN943.6[电子电信—信号与信息处理]