Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Christopher Schirmer"'
Autor:
Rajesh K. Sharma, Wim Kotterman, Markus H. Landmann, Christopher Schirmer, Christian Schneider, Frank Wollenschläger, Giovanni Del Galdo, Matthias A. Hein, Reiner S. Thomä
Publikováno v:
International Journal of Antennas and Propagation, Vol 2013 (2013)
This paper provides an overview of ongoing research in over-the-air (OTA) testing for next-generation communication and data transmission devices with special consideration of cognitive radio (CR). Existing state-of-the-art techniques and their merit
Externí odkaz:
https://doaj.org/article/42fb49d3e45e46f68a6ac71781ae202f
Publikováno v:
IET Microwaves, Antennas & Propagation. 12:554-560
Antenna characterisation is usually performed by antenna pattern measurements in an anechoic chamber. Subsequently, a conducted test, the radiated two-stage or the wireless-cable method can be used for an overall system evaluation considering the mea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ed18c3367f138eb8d7314e248bc3092
https://doi.org/10.1049/iet-map.2017.0580
https://doi.org/10.1049/iet-map.2017.0580
Autor:
Bruno Bougard, De Wilde Wim, Gonzalo Seco Granados, Alexander Popugaev, Daniel Egea Roca, Jose A. Lopez-Salcedo, Gert Cuypers, Markus Landmann, Christopher Schirmer, Jean-Marie Sleewaegen
Publikováno v:
Proceedings of the 31st International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2018).
This paper presents a method to detect and mitigate a spoofing attack by means of a dual polarized antenna. It exploits the similarity in polarization of spoofed satellites to identify spoofed satellites and copes with three major challenges. A first
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cedcb09807b5869eea38d0871ee152ab
https://doi.org/10.33012/2018.15917
https://doi.org/10.33012/2018.15917
Publikováno v:
2017 11th European Conference on Antennas and Propagation (EUCAP).
Two OTA test methods from literature are selected as those most suited for testing future 5G equipment when assessing end-to-end performance: coherent wave-field synthesis and radiated two-stage or “Wireless Cable”. Both methods have their advant
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30062b7523031a72171aca80a3d1b12d
https://doi.org/10.23919/eucap.2017.7928837
https://doi.org/10.23919/eucap.2017.7928837
Autor:
Wim A. Th. Kotterman, Markus Landmann, Christopher Schirmer, Giovanni Del Galdo, Alexander Rügamer
Publikováno v:
2017 11th European Conference on Antennas and Propagation (EUCAP).
Antenna characterization is usually performed by antenna pattern measurements in an anechoic chamber. Subsequently, a conducted test, the Radiated Two-Stage (RTS) or the Wireless-Cable method can be used for an overall system test considering the mea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9aaa76ee79e038ed32377ed15bd5a1fa
https://doi.org/10.23919/eucap.2017.7928727
https://doi.org/10.23919/eucap.2017.7928727
Autor:
Wolfgang Felber, Marcus Grossmann, Alexander Rügamer, Markus Landmann, Christopher Schirmer, Mario Lorenz, Simon Taschke
Publikováno v:
PLANS
In this paper, we describe the principle, hardware/software setup, calibration and verification measurement results of a wave field synthesis (WFS) over-the-air (OTA) testbed for global navigation satellite systems (GNSS). It represents a new approac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c854d89141698dd404df5fb013da9ab6
https://doi.org/10.1109/plans.2016.7479782
https://doi.org/10.1109/plans.2016.7479782
Autor:
Markus Landmann, Christopher Schirmer, Giovanni Del Galdo, Rainer Perthold, Mario Lorenz, Wim A. Th. Kotterman
Publikováno v:
2016 10th European Conference on Antennas and Propagation (EuCAP).
With the development of advanced communication systems such as ITS-G5 (C2C, C2I), mobile, and in-car communication systems, more and more systems are operating simultaneously. To verify their reliability in a coexistence scenario, all systems have to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49c67ed4eae91188e586ce4bb9f86b7e
https://doi.org/10.1109/eucap.2016.7481106
https://doi.org/10.1109/eucap.2016.7481106
Autor:
Markus Landmann, Wim Kotterman, Christopher Schirmer, Giovanni Del Galdo, Albert Heuberger, Alexander Rügamer, Gregor Siegert
Publikováno v:
SAM
In satellite-based systems, such as global navigation satellite systems (GNSS), the use of antenna arrays is becoming increasingly common, as it allows various applications, such as jammer/spoofer suppression or improving the positioning accuracy in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dee1b6698bea9651a8c30f57f85d62a6
https://doi.org/10.1109/sam.2014.6882353
https://doi.org/10.1109/sam.2014.6882353
Publikováno v:
The 8th European Conference on Antennas and Propagation (EuCAP 2014).
For three-dimensional electromagnetic wave field synthesis, the orientation of dual-polarised antenna elements has influence on the size or volume of the usable ”quiet zone” or ”sweet spot”. The customary choice of polarisation directions alo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62b9db348a2853705917f371dba51162
https://doi.org/10.1109/eucap.2014.6902560
https://doi.org/10.1109/eucap.2014.6902560
Autor:
Matthias Hein, Reiner S. Thoma, Albert Heuberger, Markus Landmann, Giovanni Del Galdo, Christopher Schirmer, Wim A. Th. Kotterman
Publikováno v:
The 8th European Conference on Antennas and Propagation (EuCAP 2014).
For the sake of new radio devices to conform to respective standards, implementing functionality such as cognitive radio, Long Term Evolution beyond 2×2, or Global Navigation Satellite Systems, a demand for extensive testing arises. A promising solu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3b3cb3f5855fae26d49a6c0b6391e33
https://doi.org/10.1109/eucap.2014.6902557
https://doi.org/10.1109/eucap.2014.6902557