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Estimation bounds of beat signal in the R-Mode localization system

Grundhöfer, Lars und Gewies, Stefan und Del Galdo, Giovanni (2021) Estimation bounds of beat signal in the R-Mode localization system. IEEE Access, Seiten 1-9. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/ACCESS.2021.3076845. ISSN 2169-3536.

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Kurzfassung

The R-Mode system is a terrestrial navigation system currently under development, which exploits existing means of medium frequency radio transmission. The positioning and timing performance depends on the estimation of the signals’ phase offset, from which the ranging information is derived. For an analogous problem such as the single-tone phase estimation, the Cramér-Rao bound (CRB) describes the minimal achievable performance in the mean squared error sense. For R-Mode, the problem involves the estimation of the phase offset for a beat signal, which can be described as the difference of phase estimation for the two aiding carriers next to the signal. This estimates are not statistically independent for finite observation, as we show in this paper. The effect becomes stronger for short observation times, which are important for a near real time application. In this contribution, we are interested in phase offset estimation for the signal models relevant to R-Mode: a beat signal and a beat signal combined with an MSK signal. A closed-form lower CRB is proposed for the aforementioned signal models phase estimation, as well as a generalization of the bound for the phase-difference estimation. Based on this derivation, optimized bit sequences are shown to improve performance of the estimates. The validity of the proposal is verified based on a simulation setup. Measurements acquired during a measurement campaign serve to further justify the usefulness of the bound. Some possible applications of such a bound are R-Mode coverage prediction and the associated phase estimators’ performance.

elib-URL des Eintrags:https://elib.dlr.de/138642/
Dokumentart:Zeitschriftenbeitrag
Titel:Estimation bounds of beat signal in the R-Mode localization system
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Grundhöfer, LarsLars.Grundhoefer (at) dlr.dehttps://orcid.org/0000-0002-8650-8280164237498
Gewies, StefanStefan.Gewies (at) dlr.dehttps://orcid.org/0000-0001-5549-8115NICHT SPEZIFIZIERT
Del Galdo, Giovannigiovanni.delgaldo (at) iis.fraunhofer.dehttps://orcid.org/0000-0002-7195-4253NICHT SPEZIFIZIERT
Datum:Juni 2021
Erschienen in:IEEE Access
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
DOI:10.1109/ACCESS.2021.3076845
Seitenbereich:Seiten 1-9
Verlag:IEEE - Institute of Electrical and Electronics Engineers
ISSN:2169-3536
Status:veröffentlicht
Stichwörter:Estimation, Global navigation satellite system ,Phase estimation, Timing, Radio navigation
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Verkehr
HGF - Programmthema:Verkehrssystem
DLR - Schwerpunkt:Verkehr
DLR - Forschungsgebiet:V VS - Verkehrssystem
DLR - Teilgebiet (Projekt, Vorhaben):V - I4Port (alt)
Standort: Neustrelitz
Institute & Einrichtungen:Institut für Kommunikation und Navigation > Nautische Systeme
Hinterlegt von: Grundhöfer, Lars
Hinterlegt am:07 Mai 2021 16:54
Letzte Änderung:24 Jul 2024 15:44

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