{"title":"利用最佳相干载波系统改进CATV传输","authors":"W. Krick","doi":"10.1109/TCATV.1980.285809","DOIUrl":null,"url":null,"abstract":"Aiming at the development of future multichannel CATV-transmission systems the utilization of phase-coherent picture carriers is discussed as a means of reducing intermodulation-and crossmodulation-distortion arising in the line repeater amplifiers. The paper presents experimental and theoretical data for comparison of transmission performance. As a basis the non-coherent operation is reviewed. In order to evaluate the improvement by a coherent system the problem of optimum carrier phase relation is investigated. Experimental results demonstrate the suppression of distortion, if the phases are adjusted according to a certain code which was found by optimization.","PeriodicalId":100638,"journal":{"name":"IEEE Transactions on Cable Television","volume":"CATV-5 2","pages":"65-71"},"PeriodicalIF":0.0000,"publicationDate":"1980-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TCATV.1980.285809","citationCount":"7","resultStr":"{\"title\":\"Improvement of CATV Transmission Using an Optimum Coherent Carrier System\",\"authors\":\"W. Krick\",\"doi\":\"10.1109/TCATV.1980.285809\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Aiming at the development of future multichannel CATV-transmission systems the utilization of phase-coherent picture carriers is discussed as a means of reducing intermodulation-and crossmodulation-distortion arising in the line repeater amplifiers. The paper presents experimental and theoretical data for comparison of transmission performance. As a basis the non-coherent operation is reviewed. In order to evaluate the improvement by a coherent system the problem of optimum carrier phase relation is investigated. Experimental results demonstrate the suppression of distortion, if the phases are adjusted according to a certain code which was found by optimization.\",\"PeriodicalId\":100638,\"journal\":{\"name\":\"IEEE Transactions on Cable Television\",\"volume\":\"CATV-5 2\",\"pages\":\"65-71\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1980-04-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1109/TCATV.1980.285809\",\"citationCount\":\"7\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE Transactions on Cable Television\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://ieeexplore.ieee.org/document/4065178/\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Cable Television","FirstCategoryId":"1085","ListUrlMain":"https://ieeexplore.ieee.org/document/4065178/","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Improvement of CATV Transmission Using an Optimum Coherent Carrier System
Aiming at the development of future multichannel CATV-transmission systems the utilization of phase-coherent picture carriers is discussed as a means of reducing intermodulation-and crossmodulation-distortion arising in the line repeater amplifiers. The paper presents experimental and theoretical data for comparison of transmission performance. As a basis the non-coherent operation is reviewed. In order to evaluate the improvement by a coherent system the problem of optimum carrier phase relation is investigated. Experimental results demonstrate the suppression of distortion, if the phases are adjusted according to a certain code which was found by optimization.
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