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- W2914493587 abstract "Trading in the modern world strongly depends onmerchant shipping. The ongoing globalization is accompaniedwith an increasing vessel sizes and traffic density in ecological andeconomical sensitive areas. To prevent collisions and groundingsGlobal Navigation Satellite Systems (GNSS) are used today as theprimary source for position, navigation and timing information.Because of GNSS vulnerability the maritime world is looking fora backup system. R(anging)-Mode, a new system which utilizesexisting maritime signals of opportunity is one candidate toprovide absolute positioning and timing. Currently a R-Modereference implementation on maritime radio beacons, whichoperate in the 300 kHz band, is broadcasted. Here, the legacysignal-, Minimum Shift Keying (MSK) modulated information,is extended by two continuous wave (CW) signals.The paper shows how the phase is estimated using timesynchronous measurements of a Software Defined Radio withexternal time synchronization. In the first part the measurementsetup is described, with special attention given to time synchronization using a GNSS stabilized rubidium clock, which is akey factor for good estimation results. Furthermore, a maximumlikelihood estimator of the phase and a Hilbert transform basedestimator are introduced. In the end the outcome is presentedwhen applying these methods on recorded signals from Germanradio beacons located in Helgoland and Zeven." @default.
- W2914493587 created "2019-02-21" @default.
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- W2914493587 date "2018-01-01" @default.
- W2914493587 modified "2023-09-26" @default.
- W2914493587 title "Phase estimation for navigation purposes in maritime environments" @default.
- W2914493587 hasPublicationYear "2018" @default.
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