Search for dissertations about: "Ultra-Wideband"
Showing result 16 - 20 of 60 swedish dissertations containing the word Ultra-Wideband.
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16. Electron Tunneling and Field-Effect Devices in mm-Wave Circuits
Abstract : Short high-frequency electromagnetic pulses, also referred to as wavelets, are considered for use in various short-range impulse based ultra-wideband applications, such as communication, imaging, radar, spectroscopy, and localization. This thesis investigates field-effect and tunneling based semiconductor devices and their operation in millimeter-wave (mm-wave) impulse transceivers. READ MORE
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17. Accuracy and Delay: An Inherent Trade-off in Cooperative UWB Navigation
Abstract : Location-aware applications and wireless sensor networks are becoming essential in our daily lives from a commercial, and public perspectives. The need of localization information to drive the applications is a key requirement. New technologies have emerged to tackle the problem of the limitations of the Global Positioning System (GPS) solutions. READ MORE
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18. On the trade-off between uncertainty and delay in UWB and 5G localization
Abstract : Location-aware technologies in combination with emerging wireless communication systems have revolutionized many aspects of our daily lives by means of applications within the commercial, public and military sectors. Ultra-wideband (UWB) and 5G stand out as emerging radio frequency (RF) based technologies that tackle the limitations of Global Positioning System solutions. READ MORE
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19. Impulse Radio UWB for the Internet-of-Things : A Study on UHF/UWB Hybrid Solution
Abstract : This dissertation investigates Ultra-Wideband (UWB) techniques for the next generation Radio Frequency Identification (RFID) towards the Internet-of-Things (IoT). In particular, an ultra-high frequency (UHF) wireless-powered UWB radio (UHF/UWB hybrid) with asymmetric links is explored from system architecture to circuit implementation. READ MORE
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20. Measurement-Based Modeling of Wireless Propagation Channels - MIMO and UWB
Abstract : Future wireless systems envision higher speeds and more reliable services but at the same time face challenges in terms of bandwidth being a limited resource. Two promising techniques that can provide an increased throughput without requiring additional bandwidth allocation are multiple-input multiple-output (MIMO) systems and ultra-wideband (UWB) systems. READ MORE