Konferenzbeiträge

Dupleich, Diego; Grimm, Michael; Schlembach, Florian; Thomä, Reiner
Practical aspects of a digital feedforward approach for mitigating non-linear distortions in receivers. - In: 11th International Conference on Telecommunication in Modern Satellite, Cable and Broadcasting Services (TELSIKS), 2013, ISBN 978-1-4799-0901-8, (2013), S. 170-177

http://dx.doi.org/10.1109/TELSKS.2013.6704914

Kaleem, Saqib; Rentsch, Sven; Humbla, Stefan; Hein, Matthias
A package-level implementation of traveling-wave switch using PIN-diodes. - In: 2013 IEEE 22nd Conference on Electrical Performance of Electronic Packaging and Systems (EPEPS), ISBN 978-1-4799-0707-6, (2013), S. 179-182

http://dx.doi.org/10.1109/EPEPS.2013.6703493

Grimm, Michael; Sharma, Rajesh Kumar; Hein, Matthias; Thomä, Reiner S.; Zemmari, Reda
Improved BER performance in GSM by mitigating non-linear distortions in the receiver. - In: European Microwave Conference (EuMC), 2013, ISBN 978-1-4799-0264-4, (2013), S. 565-568

http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=6686718

Porzig, Konstantin; Brauer, Hartmut; Töpfer, Hannes
Biological tissues dispersivity and power loss density in transcranial magnetic stimulation. - In: 2013 21st International Conference on Software, Telecommunications and Computer Networks (SoftCOM), ISBN 978-953-290-043-9, (2013), insges. 5 S.

Power loss density and energy converted into heat considering dispersive biological tissue was investigated in the framework of transcranial magnetic stimulation (TMS). The solutions were obtained by applying an analytic method of Eaton [1] and a finite-element method (FEM). A commercial available figure-of-8 coil with a biphasic current pulse operates as the source of excitation. The calculations were performed in the frequency domain by using 1000 complex harmonics at different frequencies in order to reconstruct the transient signal in the excitation coil. The displacement current density was taken into account to provide an accurate estimate of the total energy. The human head was modeled as a homogeneous isotropic dispersive volume conductor consisting of grey matter (GM). The dielectric properties of GM were calculated in dependence on the frequency by means of the Cole-Cole model from Gabriel et al. [2]. The induced electric field as well as the current density are compared against those obtained in the non-dispersive case. The results revealed an increased magnitude of the peak value of the current density by 22.3% compared to the non-dispersive case. However, the induced electric field was not influenced by tissues dispersivity. Finally it was shown that the frequency dependent biological tissue affects the time development of the power loss density but has only minor effects on the total energy converted into heat. Keywords - dispersive material, finite-element method, transcranial magnetic stimulation.

http://dx.doi.org/10.1109/SoftCOM.2013.6671857

Renhak, Karsten; Seitz, Jochen
User centric multi-purpose messaging framework. - In: International Conference on ICT Convergence (ICTC), 2013, ISBN 978-1-4799-0696-3, (2013), S. 66-71

The changing demography requires new kinds of support for elderly people. Technical assistance systems could allow (aged) people to stay longer in well-known neighborhoods. While utilizing familiar media usage habits, the acceptance rate of a technical assistance system will be increased. Therefore, as many as possible potential communication methods between users and the assistance system are required. This paper describes a communication middleware for an assistance system which was originally designed and developed within the finished research project called "WEITBLICK". The middleware has been continuously enhanced independently from the research project. Further, the paper will discuss two use cases and two demonstration applications which are utilizing the described communication middleware.

http://dx.doi.org/10.1109/ICTC.2013.6675308