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Objektverfolgung Bei Einer Vollständigen Fahrzeugumfeldüberwachung...

By: G. Wanielik; T. Pech; J. Reuter; M. Schuster

Description: Institut für Systemdynamik, HTWG Konstanz, Deutschland. Für modernste Fahrerassistenzsysteme ist zunehmend eine vollständige Rundumüberwachung des fließenden Verkehrs erforderlich. In diesem Artikel wird ein Ansatz zur Überwachung des gesamten umliegenden Verkehrs mittels Radarsystemen präsentiert. Hierfür wurde ein Versuchsfahrzeug mit insgesamt sechs Radarsensoren ausgerüstet, um eine möglichst hohe Umfeld-Überwachung zu ermöglichen. Für diese Konfigu...

Blackman, S. and Popoli, R.: Design and Analysis of Modern Tracking Systems, Artech House Boston, 1999.; Buhren, M. and Yang, B.: Simulation of Automotive Radar Target Lists using a Novel Approach of Object Representation, in: Intelligent Vehicles Symposium, 2006 IEEE, 314–319, 2006.; Darms, M., Rybski, P., Baker, C., and Urmson, C.: Obstacle Detection and Tracking for the Urban Challenge, IEEE T. Intell. Transp., 10, 475–485, 2009.; Erdinc, O., Willett, P., and Bar-Shal...

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A Fully Probe Corrected Near-field Far-field Transformation Techni...

By: R. A. M. Mauermayer; T. F. Eibert

Description: Lehrstuhl für Hochfrequenztechnik, Technische Universität München, 80290 Munich, Germany. The far-field behavior of an antenna under test (AUT) can be obtained by exciting the AUT with a plane wave. In a measurement, it is sufficient if the plane wave is artificially generated in the vicinity of the AUT. This can be achieved by using a virtual antenna array formed by a probe antenna which is sequentially sampling the radiating near-field of the AUT at di...

Bennett, J. and Schoessow, E.: Antenna near-field/far-field transformation using a plane-wave-synthesis technique, Proceedings of the Institution of Electrical Engineers, 125, 179–184, doi:10.1049/piee.1978.0048, 1978.; EM Software and Systems: FEKO Suite 6.1, http://www.feko.info, 2011.; Hansen, J. E.: Spherical near-field antenna measurements, IEE Electromagnetic Waves Series 26, Pete...

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Comparison of Linear and Logarithmic Receiver Signals from Polarim...

By: Chandra; Hagen; Ghorbani; Tracksdorf; Bebbington

Description: Professur für Hochfrequenztechnik und Photonik, Technische Universität Chemnitz, Reichenhainer Strasse 70, 09126 Chemnitz, Germany. Usually common polarimetric weather radar DSP-products (e.g.: reflectivity, differential reflectivity, linear depolarisation ratio - for both - co-polar and cross-polar signal components) are based on the logarithmic receiver output, because of the large dynamic range provided by the logarithmic receiver. In this paper for t...

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Some Anomalies of Mesosphere/Lower Thermosphere Parameters During ...

By: M. Placke; G. Stober; P. Hoffmann; Ch. Jacobi

Description: Institute for Meteorology, University of Leipzig, Stephanstr. 3, 04103 Leipzig, Germany. The recent solar minimum has been characterized by an anomalous strong decrease of thermospheric density since 2005. Here we analyze anomalies of mesosphere/lower thermosphere parameters possibly connected with this effect. In particular, nighttime mean LF reflection heights measured at Collm, Germany, show a very strong decrease after 2005, indicating a density dec...

Bremer, J.: Detection of long-term trends in the mesosphere/lower thermosphere from ground-based radio propagation measurements, Adv. Space Res., 35, 1398–1404, 2005.; Bremer, J. and Berger, U.: Mesospheric temperature trends derived from ground-based LF phase-height observations at mid-latitudes: comparison with model simulations, J. Atmos. Solar-Terr. Phys., 64, 805–816, 2002.; Bremer, J. and Peters, D.: Influence of stratospheric ozone changes on long-term trends in t...

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Radiation Pattern Analysis of Antenna Systems for Mimo and Diversi...

By: H. Eul; O. Klemp

Description: University of Hannover, Department of High Frequency Technology and Radio Systems, Hannover, Germany. Multiple-input multiple-output (MIMO) antenna systems and antenna configurations for wideband multimode diversity rank among the emerging key technologies in next generation wireless communication systems. The analysis of such transmission systems usually neglects the influences of real antenna radiation characteristics as well as the influences of mutua...

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Downlink Beamforming Concepts in Utra Fdd : Volume 1, Issue 8 (05/...

By: P. Jung; A. Dekorsy; M. Schacht

Description: Lucent Technologies, Thurn-und-Taxis-Strasse 10, 90411 Nuremberg, Germany. This article gives a comparison of beamforming concepts. Adaptive beamforming and fixed beam switching in WCDMA-FDD-mode are compared from a system level perspective, ordinary sectorization (three 120° sectors) serves as a basis for comparison. Pilot channels P-CPICH (Primary Common Pilot Channel) and S-CPICH (Secondary CPICH) are considered as additional interference. For adapt...

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Remote Sensing and Modeling of Lightning Caused Long Recovery Even...

By: E. D. Schmitter

Description: University of Applied Sciences Osnabrueck, 49076 Osnabrueck, Germany. On the 4 November 2012 at 3:04:27 UT a strong lightning in the midst of the North Sea affected the propagation conditions of VLF/LF transmitter radio signals from NRK (Iceland, 37.5 kHz) and GBZ (UK, 19.58 kHz) received at 5246° N 8° E (NW Germany). The amplitude and phase dips show a recovery time of 6–12 min pointing to a LOng Recovery Early VLF (LORE) event. Clear assignment of the...

Barrington-Leigh, C. P.: Fast Photometric Imaging of High Altitude Optical Flashes above Thunderstorms, chap. 2.4.2, Ionization, Dissertation, Stanford University, Sep. 2000.; Cotts, B. R. T. and Inan, U. S.: VLF observation of long ionospheric recovery events, Geophys. Res. Lett., 34, L14809, doi:10.1029/2007GL030094, 2007.; Cummer, S. A., Inan, U. S., and Bell, T. F.: Ionospheric D region remote sensing using VLF radio...

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Simultaneous Large-scale Reliability Analysis of Ultra-thin Mos Ga...

By: W. H. Krautschneider; D. Schroeder; K. M. Hafkemeyer; A. Domdey

Description: Hamburg University of Technology, Institute of Nanoelectronics, Hamburg, Germany. This article presents an automated test system targeting the large-scale analysis of ultra-thin MOS gate dielectric degradation. The system allows for stress tests at elevated temperatures as well as supply voltages and long-term tests of thousands of MOS devices simultaneously. The aim is to build-up large and hence significant statistics about the degradation process as a function of time.

Lombardo, S., Stathis, J. H., Lindner, B. P., et al.: Dielectric Breakdown Mechanisms in Gate Oxides, J. Appl. Phys., 98, 121301, 1–36, 2005.; Depas M., Verneire, B., Mertens, P. W., et al.: Determination of Tunnelling Parameters in Ultra-Thin Oxide Layer Poly-Si/SiO2/Si Structures, Solid-State Electronics, 38, 8, 1465–1471, 1995.; Avellan Hampe, A.: Charakterisierung von MOS-Transistoren vor und nach dem Gateoxiddurchbruch, ISBN 3-18-337109-X, VDI Verlag, 29 pp. , 2004.

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Highly Efficient Integrated Rectifier and Voltage Boosting Circuit...

By: T. Hehn; Y. Manoli; M. Ortmanns; D. Maurath; C. Peters

Description: Chair of Microelectronics, Department of Microsystems Engineering (IMTEK), University of Freiburg, Georges-Koehler-Allee 102, 79110 Freiburg, Germany. This paper presents novel circuit concepts for integrated rectifiers and voltage converting interfaces for energy harvesting micro-generators. In the context of energy harvesting, usually only small voltages are supplied by vibration-driven generators. Therefore, rectification with minimum voltage losses a...

Ghovanloo, M. and Najafi, K.: Fully integrated wideband high-current rectifier for inductively powered devices, IEEE J. Solid State Circuits, 39, 1976–1984, 2004.; Gobbi, L., Cabrini, A., and Torelli, G.: Impact of Parasitic Elements on CMOS Charge Pumps: a Numerical Analysis, IEEE International Symposium on Circuits and Systems (ISCAS), May 2006.; Lehmann, T. and Moghe, Y.: On-chip active power rectifiers for biomedical applications, IEEE International Symposium on Circ...

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Considerations on Radar Localization in Multi-target Environments ...

By: T. Musch; G. Armbrecht; E. Denicke; H. Rabe; I. Rolfes

Description: Leibniz Universität Hannover, Institut für Hochfrequenztechnik und Funksysteme, Appelstr. 9a, 30167 Hannover, Germany. In a multitude of applications like e.g. in automotive radar systems a localization of multiple passive targets in the observed area is necessary. This contribution presents a robust approach based on trilateration to detect point scatterers in a two-dimensional plane using the reflection and transmission information of only two antennas...

Carriere, R. and Moses, R.: High resolution radar target modeling using a modified Prony estimator, IEEE T. Antenn. Propag., 40, 13–18, 1992.; Helmbrecht, E. and Biebl, E.: Radar imaging using noncoherent sensors, Proc. IEEE MTT-S International Microwave Symposium Digest, 4 pp., 2005.; Michael, B., Menzel, W., and Gronau, A.: A real-time close-range imaging system with fixed antennas, IEEE T. Microw. Theory, 48, 2736–2741, 2000.; Wenger, J.: Future Trends in Automotive R...

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Measurement Procedures for Characterization of Wind Turbine Wakes ...

By: G. V. Iungo; F. Porté-agel

Description: Wind Engineering and Renewable Energy Laboratory (WIRE), École Polytechnique Fédérale de Lausanne (EPFL), Switzerland. The wake flow produced from an Enercon E-70 wind turbine is investigated through three scanning Doppler wind LiDARs. One LiDAR is deployed upwind to characterize the incoming wind, while the other two LiDARs are located downstream to carry out wake measurements. The main challenge in performing measurements of wind turbine wakes is repr...

Bingöl, F., Mann, J., and Larsen, G. C.: Light detection and ranging measurements of wake dynamics; Part I: One-dimensional scanning, Wind Energy, 13, 51–61, 2010.; Chamorro, L. and Porté-Agel, F.: Effects of thermal stability and incoming boundary-layer flow characteristics on wind-turbine wakes: a wind-tunnel study, Bound.-Lay. Meteorol., 136, 515–533, 2010.; Emeis, S., Harris, M., and Banta, R.: Boundary-layer anemometry by optical remote sensing for wind energy appli...

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Large Scale Integrated Hydrological Modelling of the Impact of Cli...

By: T. Marke; W. Mauser; U. Strasser; M. Prasch

Description: Department of Geography, Ludwig-Maximilians-Universität Munich, Germany. Future climate change will affect the water availability in large areas. In order to derive appropriate adaptation strategies the impact on the water balance has to be determined on a regional scale in a high spatial and temporal resolution. Within the framework of the BRAHMATWINN project the model system DANUBIA, developed within the project GLOWA Danube (GLOWA Danube, 2010; Mause...

Barnett, T. P., Adam, J. C., and Lettenmaier, D. P.: Potential impacts of a warming climate on water availability in snow-dominated regions, Nature, 438, 303–309, 2005.; Boston University: NASA TERRA/MODIS HDF-EOS MOD12Q1 V004 Land Cover Product Binary Data, Eurasia subset, IGBP Class Scheme, http://duckwater.bu.edu/lc/mod12q1.html (last access: 26~April~2007), 2004.; FAO-UNESCO: The Digital Soil Map of the World, Version 3.6, 2003.; Flügel, W.-A.: Hydrological Response ...

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Turbo Equalization of Nonlinear Isi-channels Using High Rate Fec C...

By: A. Dittrich; M. Siegrist; W. Sauer-greff; T. Schorr; R. Urbansky

Description: University of Kaiserslautern, Communications Engineering, Erwin-Schrödinger-Strae, 67653 Kaiserslautern, Germany. Turbo equalization is a widely known method to cope with low signal to noise ratio (SNR) channels corrupted by linear intersymbol interference (ISI) (Berrou and Galvieux, 1993; Hagenauer et al., 1997). Recently in this workshop it was reported that also for nonlinear channels a remarkable turbo decoding gain can be achieved (Siegrist et al., ...

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Implementierung Eines Verlustleistungsoptimierten Dezimators Für K...

By: M. Ortmanns; J. Becker; N. Lotze; M. Becker; Y. Manoli

Description: Lehrstuhl für Mikroelektronik, Albert-Ludwigs-Universität, Georges-Köhler-Allee 102 DG, 79110 Freiburg, Germany. Dieser Beitrag stellt die Implementierung eines neuartigen Ansatzes einer effizienten Dezimator-Architektur für kaskadierte Sigma-Delta Modulatoren vor. Die Rekombinationslogik kaskadierter Modulatoren und die Korrektur des Verstärkungsfehlers zeitkontinuierlicher (CT) Modulatoren werden in die erste Stufe des Dezimators integriert. Eine ents...

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Real-time Ionospheric N(H) Profile Updating Over Europe Using Iri-...

By: A. Vernon; Lj. R. Cander; B. Zolesi; D. Buresova

Description: Institute of Atmospheric Physics, Czech Republic. In this paper a method for real-time updating of ionospheric electron density profile, N(h), over Europe using an ionospheric model and real-time measurements at ionosonde locations is presented. The N(h) profile update over European area has been simulated with the IRI-2000 ionospheric model and real-time N(h) profiles obtained from the EU COST271 Action Space Weather Database. Preliminary findings ar...

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Satellitengestützte Lokalisierung in Urbanen Gebieten Mit Globalen...

By: P. Reisdorf Und G. Wanielik

Description: Professur für Nachrichtentechnik, Technische Universität Chemnitz, Reichenhainer Straße 70, 09126 Chemnitz, Germany. Die Kenntnis des eigenen Standortes an jedem Punkt der Erde und zu jeder Zeit ist eine wichtige Voraussetzung für viele Anwendungen sowohl im Straßenverkehr als auch zur Orientierung einzelner Personen. Wurde bisher das bekannte GPS vorwiegend eingesetzt, so existiert mit GLONASS und entsprechenden Mehrsystemempfängern die Möglichkeit der ...

Artaud, G., de Latour, A., Dantepal, J., Ries, L., Senant, E., Maury, N., Denis, J.-C., and Bany, T.: A new GNSS multi constellation simulator: NAVYS, in: Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC), 2010 5th ESA Workshop on, 1–8, 2010.; Cai, C.: A Solution for Combined GPS/GLONASS Navigation in Conditions of Limited Satellite Visibility, in: Proceedings of the 21st International Technical Meeting of the Satelli...

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Eine Fpaa-architektur Zur Rekonfigurierbaren Instantiierung Von Ze...

By: Y. Manoli; J. Becker

Description: Lehrstuhl für Mikroelektronik, IMTEK, Albert-Ludwigs-Universität, 79110 Freiburg, Germany. Im Folgenden wird eine neue Methodik von FPAAs (Field Programmable Analog Arrays) gezeigt, die speziell für die Instantiierung von zeitkontinuierlichen (continuous-time, CT) Analogfiltern in Hardware entwickelt wurde. Die Chiptopologie beinhaltet 17 digital konfigurierbare analoge Blöcke (configurable analog blocks, CABs), die durch ein hexagonales Netzwerk mitei...

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Comparison of Methods for Broadband Electromagnetic Characterizati...

By: D. Kornek; I. Rolfes; S. Preihs; C. Orlob

Description: Leibniz Universität Hannover, Institut für Hochfrequenztechnik und Funksysteme, Appelstr. 9A, 30167 Hannover, Germany. Combining the Molded Interconnect Device technology with the Laser Direct Structuring technology exhibits the potential of designing electrical and mechanical components on three-dimensional surfaces to increase functionality, level of integration and to reduce costs. When taking advantage of this technology especially in the design of R...

Arz, U. and Leinhos, J.: Broadband Permittivity Extraction from On-Wafer Scattering-Parameter Measurements, 12th IEEE Workshop on Signal Propagation on Interconnects, Avignon, France, 1–4, 2008.; Heinrich, W.: Quasi-TEM Description of MMIC Coplanar Lines Including Conductor-Loss Effects, IEEE T. Microw. Theory, 41, 45–52, 1993.; Baker-Jarvis, J., Vanzura, E. J., and Kissick, W. A.: Improved Technique for Determining Complex Permittivity with the Transmission/Reflection M...

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Extreme Ultraviolet (Euv) Solar Spectral Irradiance (Ssi) for Iono...

By: Ch. Jacobi; Ch. Erhardt; G. Schmidtke; B. Nikutowski

Description: Fraunhofer Institute for Physical Measurement Techniques IPM, Heidenhofstrasse 8, 79110 Freiburg, Germany. After a historical survey of space related EUV measurements in Germany and the role of Karl Rawer in pursuing this work, we describe present developments in EUV spectroscopy and provide a brief outlook on future activities. The group of Karl Rawer has performed the first scientific space project in Western Europe on 19th October 1954. Then it was de...

Avakyan, S. V.: Solar Patrol: Absolute measurements of ionizing solar radiation, Adv. Space Res., 37, 297–302, 2006.; Bruner Jr., E. C., Acton, L. W., Brown, W. A., Salat, S. W., Franks, A., Schmidtke, G., Schweizer, W., and Speer, R. J.: X-ray spectrometer spectrograph telescope system, Proceed. Society Photo-Optical Instrumentation Engineers, 184, 270–277, 1979.; Fischer, F.: Erfahrungen mit offenen UV-Zählrohren im Wellenlängenbereich zwischen 900 und 1300 Å, Optik, 2...

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Matisse: an Arcgis Tool for Monitoring and Nowcasting Meteorologic...

By: P. Mercogliano; A. L. Zollo; V. Rillo

Description: Regional Models and geo-Hydrological Impacts Division, CMCC – EuroMediterranean Centre on Climate Change, Capua (CE), Italy. Adverse meteorological conditions are one of the major causes of accidents in aviation, resulting in substantial human and economic losses. For this reason it is crucial to monitor and early forecast high impact weather events. In this context, CIRA (Italian Aerospace Research Center) has implemented MATISSE (Meteorological AviaTIo...

Austin, G. and Bellon, A.: The use of digital weather radar records for short-term precipitation forecasting, Q. J. Roy. Meteorol. Soc., 100, 658–664, 1974.; Doms, G. and Schättler, U.: A description of the nonhydrostatic regional model LM, Deutscher Wetterdienst, Offenbach, Germany, 2002.; Barrere Jr., C. A., Eilts, M., Johnson, J., Fritchie, R., Spencer, P., Shaw, B., Li, Y., Ladwig, W., Schudalla, R., and Mitchell, D.: An Aviation Weather Decision Support System (AWDS...

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