Now showing items 41-50 of 122
Impulse-radio ultra-wideband transmitter for communication and localization
(Universität Ulm, 2017-03-10)
Ultra-wideband radio is unique communication technology which combines high data rate communication and precise indoor localization capabilities in one system. These benefits are achieved thanks to wide signal bandwidths ...
Algebraic decoding over finite and complex fields using reliability information
(Universität Ulm, 2018-01-10)
In this dissertation, new algebraic decoding algorithms for Reed–Solomon codes are developed, all of which use reliability information. The two main scenarios are Reed–Solomon codes defined over finite fields and the ...
PLL based fully-integrated LO generation for wideband RF front-ends
(Universität Ulm, 2018-05-16)
This dissertation describes Phase Locked Loop (PLL) based Local Oscillator (LO) designs for RF front-end modules targeting wideband wireless communications systems from microwave to millimeter-wave ranges. With the increase ...
Pulse modulation techniques for switched-mode transmitter
(Universität Ulm, 2016-04-25)
Nowadays more and more communication devices incorporate multiple transceivers operating in different frequency bands. To reduce form factor and power consumption of such devices, a fully digital, multi-standard, multiband ...
Concept and design of a high speed current mode based SAR ADC
(Universität Ulm, 2016-07-20)
There is continuous research to exploit the improved speed of scaled CMOS technologies in realizing high-speed analog-to-digital converters and SAR ADCs are one of the candidates which can significantly benefit from this ...
Some studies of quasi-planar antennas
(Universität Ulm, 2016-12-21)
Recent decades have witnessed the rapid evolution of wireless sensing and communication systems aimed at the consumer market. The antenna is a key component in any of these systems, and the selection criteria for a commercial ...
Improvement of Cu(In,Ga)(S,Se)2 thin film solar cells with the help of Gallium and Sulfur gradients
(Universität Ulm, 2017-09-05)
The aim of this work is to optimize the absorber for Cu(In,Ga)(S,Se)2 thin film photovoltaic cells in order to get a higher efficiency of the energy conversion in the framework of a well-established industrial process. In ...
Anwendungsübergreifende Dialoge durch Wissensbasen und Taskmodelle
(Universität Ulm, 2017-11-24)
Elektronische Geräte sind zunehmend allgegenwärtig und beinhalten diverse Funktionen mit verschiedenen Anwendungen. Benutzern sind diese Funktionen oftmals so wichtig, dass sie diese selbst durchführen, wenn sie von anderen ...
Construction and decoding of evaluation codes in hamming and rank metric
(Universität Ulm, 2018-08-30)
This dissertation considers constructions and decoders of several evaluation codes in Hamming and rank metric. Codes in Hamming metric have been studied since the 1950s and the known codes considered in this thesis have ...
Healthy cognitive aging through cognitive training, physical exercise, and leisure activities : from theory to new interventions
(Universität Ulm, 2018-07)
Neurocognitive health is becoming increasingly important in our aging population. Worldwide, around 47 million people are living with dementia and the number is expected to increase to 131.5 million by 2050. Engagement in ...