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Author Grundhöfer, Lars
Affiliation German Aerospace Center (DLR), Institute of Communications and Navigation 53 Kalkhorstweg, 17235 Neustrelitz, Germany
E-mail lars.grundhoefer@dlr.de
Author Gewies, Stefan
Affiliation German Aerospace Center (DLR), Institute of Communications and Navigation 53 Kalkhorstweg, 17235 Neustrelitz, Germany
E-mail stefan.gewies@dlr.de
ISSN printed 1733-8670
URI https://repository.am.szczecin.pl/handle/123456789/2504
Abstract Signals from Global Navigation Satellite Systems are the primary source for Position, Navigation and Time (PNT) information onboard any vessel today. As these signals are prone to interference, a maritime backup system is needed to provide reliable PNT data, R(anging)-Mode is such a system. It utilizes existing maritime radio beacons or base stations of the Automatic Identification System (AIS) by adding ranging components to the legacy signals. The first modified radio beacons transmit medium frequency (MF) R-Mode signals in northern Germany. This paper has described the current state of the authors’ research and development activities at the receiver level for MF R-Mode signals. The receiver platform has been introduced, which was based on off-theshelf components and the implemented algorithms for distance estimation have been explained. Furthermore, the results of the first ranging measurements have been presented, which have shown the general suitability of the R-Mode technology as a source for maritime positioning and timing data.
Pages 57-62
Publisher Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie
Keywords GPS
Keywords GNSS
Keywords Global Navigation Satellite Systems
Keywords R-mode technology
Keywords R-mode receiver
Keywords LORAN-C
Keywords maritime radio beacons
Title R-Mode receiver development for medium frequency signals
Type Original scientific article
References
  1. Gewies, S., Dammann, A., Ziebold, R., Bäckstedt, J., Bronk, K., Wereszko, B., Rieck, C., Gustafson, P., Eliassen, C.G., Hoppe, M. & Tycholiz, W. (2018) R-Mode Testbed in the Baltic Sea. Proceedings of the 19th IALA Conference, Incheon, Korea, 27 May – 02 June, 2018.
  2. Hoppe, M., Grant, A., Hargreaves, C. & Williams, P. (2018) R-Mode: The Story so far. Proceedings of the 19th IALA Conference, Incheon, Korea, 27 May – 02 June, 2018.
  3. ITU-R (2006) Recommendation M.823-3: Technical characteristics of differential transmissions for global navigation satellite systems from maritime radio beacons in the frequency band 283.5–315 kHz in Region 1 and 285–325 kHz in Regions 2 and 3.
  4. Johnson, G. & Swaszek, P. (2014a) Feasibility Study of R-Mode using AIS Transmissions.
  5. Johnson, G. & Swaszek, P. (2014b) Feasibility Study of R-Mode combining MF DGNSS, AIS, and eLoran Transmissions.
  6. Johnson, G. & Swaszek, P. (2014c) Feasibility Study of R-Mode using MF DGPS Transmissions. ACCSEAS Project, Report.
  7. Johnson, G., Swaszek, P., Alberding, J., Hoppe, M. & Oltmann, J.-H. (2014) The Feasibility of R-Mode to Meet Resilient PNT Requirements for e-Navigation. Proceedings of the 27th International Technical Meeting of the Satellite Division of the Institute of Navigation, Tampa, FL, USA. 8–12 September 2014; pp. 3076–3100.
  8. Johnson, G., Swaszek, P., Hoppe, M., Grant, A. & Safar, J. (2017) Initial Results MF DGNSS R-Mode Alternative Position Navigation and Timing Service. Proceedings of the 2017 International Technical Meeting of the Institute of Navigation, Monterey, California, January 2017, pp. 1206– 1226.
  9. Pasupathy, S. (1979) Minimum shift keying: A spectrally efficient modulation. IEEE Communications Magazine 17, pp. 14–22.
  10. Rife, D.C. & Boorstyn, R.R. (1976) Multiple tone parameter estimation from discrete-time observations. The Bell System Technical Journal 55, pp. 1389–1410.
  11. Swaszek, D.P., Johnson, G.W., Alberding, J., Hoppe, M. & Oltmann, J.-H. (2014) Analysis of MF-DGNSS modifications for improved ranging. Proceedings of the European Navigation Conference (ENC), Rotterdam, Netherlands.
ISSN on-line 2392-0378
Language English
Funding No data
Figures 5
Tables 0
DOI 10.17402/314
Published 2018-12-18
Accepted 2018-11-13
Recieved 2018-10-30


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