Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Ingmar Groh"'
Publikováno v:
Advances in Radio Science, Vol 10, Pp 167-173 (2012)
Global navigation satellite systems, e.g. the current GPS and the future European Galileo system, are frequently used in car navigation systems or smart phones to determine the position of a user. The calculation of the mobile position is based on th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19a14534792b8298c2e2c6b79a1a7809
https://www.adv-radio-sci.net/10/167/2012/
https://www.adv-radio-sci.net/10/167/2012/
Publikováno v:
Transactions on Emerging Telecommunications Technologies. 23:715-727
In spread-spectrum navigation systems, the positioning error (or tracking accuracy) is determined from the jitter deviation of delay-locked loops (DLLs). However, jitter simulations are computationally complex, and conventional analytical methods pro
Publikováno v:
VTC Fall
Orthogonal frequency division multiplexing (OFDM) became a popular transmission approach since it suppresses intersymbol interference (ISI) due to large channel delays. However, intercarrier interference (ICI) for high mobility receivers yields corru
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e1706792ec80453419f637756146cd97
https://elib.dlr.de/96104/
https://elib.dlr.de/96104/
Autor:
Stephan Sand, Ingmar Groh
In urban environments, spread spectrum radio navigation is subject to multipath propagation causing multipath errors of tens of metres. Low-complexity high-resolution channel delay estimation is crucial for position estimation in the receivers to mit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::557f9a3c02405973016feb1f361bf5ec
https://doi.org/10.1049/iet-rsn.2011.0041
https://doi.org/10.1049/iet-rsn.2011.0041
Publikováno v:
VTC Fall
This paper presents a novel time-variant ML channel estimator for mobile radio navigation receivers. Our novel ML channel estimator enables the coherent noise averaging over several hundred codewords for time-variant channel phasors. Compared to the
Autor:
Ingmar Groh, Stephan Sand
Publikováno v:
2011 International Conference on Localization and GNSS (ICL-GNSS).
This paper presents a novel acquisition method for time-variant channels, which yield a different channel phasor for each transmission symbol due to the non-zero Doppler frequency. The alternating channel phasors prevent a coherent symbol averaging a
Autor:
Stephan Sand, Ingmar Groh
Publikováno v:
2011 International Conference on Localization and GNSS (ICL-GNSS).
This paper presents several novel acquisition algorithms for time-variant multipath channels. To acquire several closely-spaced multipath channel delays and multipath Doppler frequencies, our novel acquisition methods resort to low complexity high re
This paper presents a novel analytical derivation of the false alarm probability (FAP) and detection probability (DP) for non-line-of-sight (NLOS) detection based on LTE signals. Position estimation in indoor or urban area with cellular wireless comm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8419189ae8f4ac027773727a3498d289
https://elib.dlr.de/72166/
https://elib.dlr.de/72166/
Publikováno v:
VTC Spring
Motivated by the possibility of decreasing the intersymbol interference (ISI) which is due to large delays of a multipath mobile radio channel, orthogonal frequency division multiplexing (OFDM) became very popular. However, the timevariance of the mo
Autor:
Ingmar Groh, Christian Gentner
Publikováno v:
VTC Spring
This paper presents a novel analytical derivation of the false alarm probability (FAP) and detection probability (DP) for non-line-of-sight (NLOS) detection of GNSS signals. In navigation systems, the NLOS propagation in for example urban environment