{"title":"150兆周下宽带和窄带移动电路的比较","authors":"H. W. Nylund","doi":"10.1109/IRETVC1.1957.225087","DOIUrl":null,"url":null,"abstract":"This paper gives results of laboratory tests made to evaluate the relative transmission performances of wideband and narrowband mobile radio telephone circuits in the 150 mc band. It was found that the effects of changing from wideband to narrowband operation are dependent upon RF impulse noise, frequency errors and RF signal levels. Under ideal conditions the change to narrowband may improve circuit performance; but where impulse noise interference is severe circuit performance will be seriously degraded unless rather large compensating changes can be made in such factors as RF signal power or average modulating levels.","PeriodicalId":263631,"journal":{"name":"IRE Transactions on Vehicular Communications","volume":"30 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1957-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Comparison of wideband and narrowband mobile circuits at 150 megacycles\",\"authors\":\"H. W. Nylund\",\"doi\":\"10.1109/IRETVC1.1957.225087\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This paper gives results of laboratory tests made to evaluate the relative transmission performances of wideband and narrowband mobile radio telephone circuits in the 150 mc band. It was found that the effects of changing from wideband to narrowband operation are dependent upon RF impulse noise, frequency errors and RF signal levels. Under ideal conditions the change to narrowband may improve circuit performance; but where impulse noise interference is severe circuit performance will be seriously degraded unless rather large compensating changes can be made in such factors as RF signal power or average modulating levels.\",\"PeriodicalId\":263631,\"journal\":{\"name\":\"IRE Transactions on Vehicular Communications\",\"volume\":\"30 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1957-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IRE Transactions on Vehicular Communications\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/IRETVC1.1957.225087\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IRE Transactions on Vehicular Communications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IRETVC1.1957.225087","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Comparison of wideband and narrowband mobile circuits at 150 megacycles
This paper gives results of laboratory tests made to evaluate the relative transmission performances of wideband and narrowband mobile radio telephone circuits in the 150 mc band. It was found that the effects of changing from wideband to narrowband operation are dependent upon RF impulse noise, frequency errors and RF signal levels. Under ideal conditions the change to narrowband may improve circuit performance; but where impulse noise interference is severe circuit performance will be seriously degraded unless rather large compensating changes can be made in such factors as RF signal power or average modulating levels.
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