{"title":"长隧道多业务通信设备","authors":"A. Coraiola, G. Brambilla","doi":"10.4271/912843","DOIUrl":null,"url":null,"abstract":"The present paper describes telecommunication plants for tunnels, which can support multiple services in a wide frequency range of VHF and UHF bands. The illustrated systems have a structure employing such techniques as \"grading\" and signal optical transport, in order to reduce the number of line amplifiers per unit of tunnel length and the amplifier powers.","PeriodicalId":126255,"journal":{"name":"Vehicle Navigation and Information Systems Conference, 1991","volume":"77 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1991-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Multiservice communications plants for long tunnels\",\"authors\":\"A. Coraiola, G. Brambilla\",\"doi\":\"10.4271/912843\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The present paper describes telecommunication plants for tunnels, which can support multiple services in a wide frequency range of VHF and UHF bands. The illustrated systems have a structure employing such techniques as \\\"grading\\\" and signal optical transport, in order to reduce the number of line amplifiers per unit of tunnel length and the amplifier powers.\",\"PeriodicalId\":126255,\"journal\":{\"name\":\"Vehicle Navigation and Information Systems Conference, 1991\",\"volume\":\"77 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1991-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Vehicle Navigation and Information Systems Conference, 1991\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.4271/912843\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Vehicle Navigation and Information Systems Conference, 1991","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4271/912843","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Multiservice communications plants for long tunnels
The present paper describes telecommunication plants for tunnels, which can support multiple services in a wide frequency range of VHF and UHF bands. The illustrated systems have a structure employing such techniques as "grading" and signal optical transport, in order to reduce the number of line amplifiers per unit of tunnel length and the amplifier powers.
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