Quantitative Blendungsbewertung : Blendungskennzahlen mit bildauflösender Leuchtdichtemesstechnik. - In: Licht, ISSN 0024-2861, Bd. 64 (2012), 7/8, S. 64-67
Die Blendung ist ein wichtiges Gütemerkmal in der Außenbeleuchtung, die deshalb zu bewerten und zu minimieren ist. Zur Bewertung stehen verschiedene Kennzahlen zur Verfügung, die nur aufwändig mit konventioneller Messtechnik in der Praxis erfasst werden können. Mit bildauflösender Leuchtdichtemesstechnik kann hingegen dieser Messprozess vereinfacht werden. Der Artikel zeigt am Beispiel der Lichtimmission, wie dadurch beispielsweise das Blendmaß ks einfach und ausreichend genau bestimmt werden kann. Weitere Kennzahlen könnten bildaufgelöst gemessen werden, womit aber eine entsprechende Überarbeitung der Normen einhergehen müsste.
Adaptive widely linear reduced-rank interference suppression based on the multistage Wiener filter. - In: IEEE transactions on signal processing, ISSN 1941-0476, Bd. 60 (2012), 8, S. 4003-4016
http://dx.doi.org/10.1109/TSP.2012.2197747
Relay assisted physical resource sharing: projection based separation of multiple operators (ProBaSeMO) for two-way relaying with MIMO amplify and forward relays. - In: IEEE transactions on signal processing, ISSN 1941-0476, Bd. 60 (2012), 9, S. 4834-4848
http://dx.doi.org/10.1109/TSP.2012.2200888
Optimization of a digital SQUID magnetometer in terms of noise and distortion. - In: Superconductor science and technology, ISSN 1361-6668, Bd. 25 (2012), 6, 065012, insges. 8 S.
The digital SQUID magnetometer takes advantage of flux quantization in a superconducting loop in order to measure magnetic fields. The core element of the digital SQUID is a Josephson comparator with a superconducting antenna loop attached to one of its junctions. Evaluation of the circuit from the systems point of view requires an analysis in the frequency domain. In order to obtain a high-resolution fast Fourier transform, large datasets are necessary which are difficult to generate with transient simulation tools. In this work we derive a behavioural model for the digital SQUID in order to overcome restrictions imposed by transient simulation. By means of this model the influence of the comparator grey zone and the input loop inductance on the system performance was analysed. In order to assess the system, evaluation criteria based on the power spectral density were applied, which are commonly used for characterization of semiconductor analogue to digital converters. As a result of this study, design guidelines for an optimum antenna inductance depending on the comparator grey zone are derived, allowing us to achieve an optimum system performance in terms of noise and distortion.
http://dx.doi.org/10.1088/0953-2048/25/6/065012
A "sequentially drilled" joint congruence (SeDJoCo) transformation with applications in blind source separation and multiuser MIMO systems. - In: IEEE transactions on signal processing, ISSN 1941-0476, Bd. 60 (2012), 6, S. 2744-2757
http://dx.doi.org/10.1109/TSP.2012.2190728
High-speed optical wireless demonstrators: conclusions and future directions. - In: Journal of lightwave technology, ISSN 1558-2213, Bd. 30 (2012), 13, S. 2181-2187
https://doi.org/10.1109/JLT.2012.2193874
Lorentz force sigmometry: a contactless method for electrical conductivity measurements. - In: Journal of applied physics, ISSN 1089-7550, Bd. 111 (2012), 9, 094914, insges. 7 S.
https://doi.org/10.1063/1.4716005
Impact of incomplete and inaccurate data models on high resolution parameter estimation in multidimensional channel sounding. - In: IEEE transactions on antennas and propagation, ISSN 1558-2221, Bd. 60 (2012), 2, S. 557-573
http://dx.doi.org/10.1109/TAP.2011.2173446
Multi-way space-time-wave-vector analysis for EEG source separation. - In: Signal processing, Bd. 92 (2012), 4, S. 1021-1031
https://doi.org/10.1016/j.sigpro.2011.10.014
Modelling and simulation of a simple homopolar motor of Faraday's type. - In: Facta Universitatis, ISSN 2217-5997, Bd. 24 (2011), 2, S. 221-242
During the application of simulation tools of computational electromagnetics it is sometimes difficult to decide whether the problems can be solved by the computation of electromagnetic fields or circuit simulation tools have to be applied additionally. The paper describes a typical situation in an electromagnetic CAD course, not only for beginners. The modelling and numerical simulation of a simple homopolar motor, similar to that what has been presented by Michael Faraday in 1821 firstly, was used as an example. To simulate the current flow in the permanent magnet the FEM software codes COMSOL Multiphysics including the integrated SPICE module and MAXWELL have been used. The correct simulation of the entire electric circuit as well as the precise modelling of the impressed current and of the electrode contacts turned out to be very important.
http://dx.doi.org/10.2298/FUEE1102221B