{"title":"基于GPS接收机的RTL-SDR时间和采样率同步","authors":"Jakub Kaderka, T. Urbanec","doi":"10.1109/RADIOELEKTRONIKA49387.2020.9092398","DOIUrl":null,"url":null,"abstract":"GPS receivers provide very precise Pulse Per Second (PPS) signal. A simple low cost method of time synchronization for RTL-SDR receivers using such GPS time signal is described. The PPS signal is injected into an IF stage of the RTL-SDR and detected by correlation of an expected signal shape and the measured data. The accuracy of such pulse detection algorithm is in the worst case 5 samples or up to 2.1 µs when using highest useful receiver sample rate of 2.4 MS/s. The algorithm can also be used to measure RTL-SDR oscillator offset with a very high precision for frequency corrections. The accuracy achieved is not enough for precise localization of ground targets, but it's sufficient enough to roughly estimate a location of an aircraft or a satellite.","PeriodicalId":131117,"journal":{"name":"2020 30th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":"{\"title\":\"Time and sample rate synchronization of RTL-SDR using a GPS receiver\",\"authors\":\"Jakub Kaderka, T. Urbanec\",\"doi\":\"10.1109/RADIOELEKTRONIKA49387.2020.9092398\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"GPS receivers provide very precise Pulse Per Second (PPS) signal. A simple low cost method of time synchronization for RTL-SDR receivers using such GPS time signal is described. The PPS signal is injected into an IF stage of the RTL-SDR and detected by correlation of an expected signal shape and the measured data. The accuracy of such pulse detection algorithm is in the worst case 5 samples or up to 2.1 µs when using highest useful receiver sample rate of 2.4 MS/s. The algorithm can also be used to measure RTL-SDR oscillator offset with a very high precision for frequency corrections. The accuracy achieved is not enough for precise localization of ground targets, but it's sufficient enough to roughly estimate a location of an aircraft or a satellite.\",\"PeriodicalId\":131117,\"journal\":{\"name\":\"2020 30th International Conference Radioelektronika (RADIOELEKTRONIKA)\",\"volume\":\"24 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2020-04-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2020 30th International Conference Radioelektronika (RADIOELEKTRONIKA)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/RADIOELEKTRONIKA49387.2020.9092398\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2020 30th International Conference Radioelektronika (RADIOELEKTRONIKA)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/RADIOELEKTRONIKA49387.2020.9092398","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Time and sample rate synchronization of RTL-SDR using a GPS receiver
GPS receivers provide very precise Pulse Per Second (PPS) signal. A simple low cost method of time synchronization for RTL-SDR receivers using such GPS time signal is described. The PPS signal is injected into an IF stage of the RTL-SDR and detected by correlation of an expected signal shape and the measured data. The accuracy of such pulse detection algorithm is in the worst case 5 samples or up to 2.1 µs when using highest useful receiver sample rate of 2.4 MS/s. The algorithm can also be used to measure RTL-SDR oscillator offset with a very high precision for frequency corrections. The accuracy achieved is not enough for precise localization of ground targets, but it's sufficient enough to roughly estimate a location of an aircraft or a satellite.
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