{"title":"卫星无线电系统中弱功率扩频信号的检测与同步","authors":"S.F. GORGADZE, VU SY DAO","doi":"10.36724/2072-8735-2023-17-8-4-20","DOIUrl":null,"url":null,"abstract":"The problem of joint detection (search) and synchronization of one or several weak complex spread spectrum signals, mismatched on carrier frequency, frequency phase and time delay, in satellite radio system equipment is considered. It is supposed to use a multistage parallel-serial signal detection and synchronization procedure with joint detection and tracking devices for signal parameter changes with formation of their copies in the quasi-coherent receiver. For predetermined values of the characteristics of errors in the estimation of carrier frequencies and time delays of complex spread spectrum signals a method of approximate estimation of the duration of their detection and synchronization in the satellite radio system is developed. It is shown, that at a signal/noise ratio of the order (-10...-40) dB this time duration can make less than 0.5 s at consideration of possibilities of modern methods of processing of signals and the technological decisions used at their realization.","PeriodicalId":263691,"journal":{"name":"T-Comm","volume":"9 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"DETECTION AND SYNCHRONIZATION OF WEAK POWER SPREAD SPECTRUM SIGNALS IN A SATELLITE RADIO SYSTEM\",\"authors\":\"S.F. GORGADZE, VU SY DAO\",\"doi\":\"10.36724/2072-8735-2023-17-8-4-20\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The problem of joint detection (search) and synchronization of one or several weak complex spread spectrum signals, mismatched on carrier frequency, frequency phase and time delay, in satellite radio system equipment is considered. It is supposed to use a multistage parallel-serial signal detection and synchronization procedure with joint detection and tracking devices for signal parameter changes with formation of their copies in the quasi-coherent receiver. For predetermined values of the characteristics of errors in the estimation of carrier frequencies and time delays of complex spread spectrum signals a method of approximate estimation of the duration of their detection and synchronization in the satellite radio system is developed. It is shown, that at a signal/noise ratio of the order (-10...-40) dB this time duration can make less than 0.5 s at consideration of possibilities of modern methods of processing of signals and the technological decisions used at their realization.\",\"PeriodicalId\":263691,\"journal\":{\"name\":\"T-Comm\",\"volume\":\"9 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"T-Comm\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.36724/2072-8735-2023-17-8-4-20\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"T-Comm","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.36724/2072-8735-2023-17-8-4-20","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
DETECTION AND SYNCHRONIZATION OF WEAK POWER SPREAD SPECTRUM SIGNALS IN A SATELLITE RADIO SYSTEM
The problem of joint detection (search) and synchronization of one or several weak complex spread spectrum signals, mismatched on carrier frequency, frequency phase and time delay, in satellite radio system equipment is considered. It is supposed to use a multistage parallel-serial signal detection and synchronization procedure with joint detection and tracking devices for signal parameter changes with formation of their copies in the quasi-coherent receiver. For predetermined values of the characteristics of errors in the estimation of carrier frequencies and time delays of complex spread spectrum signals a method of approximate estimation of the duration of their detection and synchronization in the satellite radio system is developed. It is shown, that at a signal/noise ratio of the order (-10...-40) dB this time duration can make less than 0.5 s at consideration of possibilities of modern methods of processing of signals and the technological decisions used at their realization.
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