Future Optimization of Hemodialysis Procedure by Application of Electrical Impedance Spectroscopy
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Studies of Higher Order Mode Couplers for the Upgraded Travelling Wave Acceleration System in the CERN SPS
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Resource Allocation for Future Wireless Relay Systems
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Wireless Channel Modeling and Estimation by Artificial Neural Networks
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Optimization of Clean, Centralized Cloud enabled Networks
Produktform: Buch
Centralized-Radio Access Network (C-RAN) offers a promising potential for efficient management of radio resources and computing resources however, it also faces several technical challenges. The focus of this dissertation is the development of novel joint mathematical frameworks and algorithms that take into account the inter-dependency of different system parameters to optimize the performance of C-RAN.
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Grating Lobe Suppression in Microstrip Patch Uniform Linear Array Antennas Using Passive Structures
Produktform: Buch
One of the critical enablers of the ever-growing wireless communication and radar technologies revolution is the low-cost, high-gain antenna, specifically, the uniform linear array (ULA) antenna. However, the ULAs have a critical issue called grating lobe that limits array designs. This dissertation thoroughly discusses this issue, presenting different methods to push the antenna array design beyond the conventional limits, especially in the microstrip patch ULAs, using passive structures.
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Lossy Dielectric Resonators for Microwave Absorber and Antenna Applications
Produktform: Buch
The development of a planar resonant absorber based on the dielectric resonance mechanism is presented. The dielectric resonator is made from a magnetic sheet absorber composed of typical lossy materials. A design guideline is provided on how to enable the broadband operation of the absorber. The method has been implemented to develop a free space and surface wave absorber. Integrating with a bandpass frequency selective surface (FSS), the composite structure serves as a radome absorber.
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Generalised Test-Zone Field Compensation
Produktform: Buch
An accurate echo cancellation technique not only reduces the cost but also the complexity of antenna measurement facilities as the performance of the absorbers and the alignment of the structures are not crucial anymore. Thus, this thesis aims to develop an exact method based on the spherical wave expansion capable of compensating for undesired signals of arbitrary nature. To validate the theory, a reflective environment is created and it is shown that the stray signals are corrected accurately.
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