Ulrich Engel

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  • Ulrich Engel
  • 2008 11th International Conference on Information…
  • 2008
In the future, the American GPS and the European Galileo Satellite Systems together will offer around 60 satellites for positioning and navigation. Despite technical differences between these two systems, the commonality of the center frequencies they use creates the potential to develop an interoperable navigation satellite receiver. Firstly, we evaluate(More)
  • Ulrich Engel
  • 2008 IEEE/ION Position, Location and Navigation…
  • 2008
The frequency and signal design of the American global positioning system (GPS) is currently in a modernization period. The baseline configuration of GPS only consists of two signals on two carrier frequencies (C/A and P(Y) code). At present the existing satellites (IIA, IIR) are replaced by new modernized satellites (IIR-M, IIF) which are capable of(More)
Recently, the fourth order virtual array concept (q = 2) has been extended to an arbitrary even order m = 2q with q ≥ 2. The intention of this paper is to investigate the direction finding performance related to GPS based on 4th, 6th and 8th order processing methods compared to common 2nd order array processing methods. The presented results are(More)
The fourth order cumulants have been shown to increase the effective aperture of an antenna compared to second order cumulants. In this paper, we investigate the potential benefits of fourth order array processing methods for the direction of arrival estimation of GPS satellites. The purpose of this paper is to present the results obtained from real(More)
In this paper, we investigate the benefits of a MULTI-GNSS receiver in an interference environment. The global satellite navigation systems GPS, GALILEO, GLONASS and COMPASSwill be considered. The regional navigation systems QZSS and IRNSS are not part of the investigation. We assume that a future Multi-GNSS receiver will use only CDMA signals. Therefore,(More)
  • Ulrich Engel
  • 2009 6th Workshop on Positioning, Navigation and…
  • 2009
In this paper, we describe a geolocation method using Time of Arrival (ToA) and Frequency of Arrival (FoA) measurements. The proposed method has been developed in particular for Global Navigation Satellite Systems (GNSS) like the American Global Positioning System (GPS) and the forthcoming European navigation system GALILEO. Most commercial GNSS receivers(More)
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