Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 191 for “"uwb"”.
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Bidirectional UWB Localization with Rigorous Sectoral Evaluations
… a bidirectional scheme of Ultra-Wideband (UWB)-based localization system, which is generally overlooked in the literature causing its potential overshadowed. The bidirectional scheme is one of the three design integration processes usually applied in UWB-based localization systems. The key …
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UWB antenna using indium tin oxide (ITO)
… resulted in the usage of ultra wide band (UWB) frequency which ranged from 3.1 GHz to 10.6 GHz. The patch antennas offer a potential solution for narrowband and with some modifications and researches done before, it does applicable for the ultra-wide band applications. It cost, light …
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Enabling Blocks for Integrated CMOS UWB Transceivers
… field, this thesis focuses on Ultra Wideband (UWB) communications, an emerging technology for providing very high data rate transmissions over very short distances. In particular the presented research deals with the circuit design of enabling blocks for MB-OFDM UWB CMOS single-chip …
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Algorithms and Architectures for UWB Receiver Design
Impulse-based Ultra Wideband (UWB) radio technology has recently gained significant research attention for various indoor ranging, sensing and communications applications due to the large amount of allocated bandwidth and desirable properties of UWB signals (e.g., improved timing resolution or …
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Adaptive interference suppression algorithms for DS-UWB systems
… symbol by symbol transmission multiuser DS-UWB systems are considered. We first investigate a generic reduced-rank scheme based on the concept of joint and iterative optimization (JIO) that jointly optimizes a projection vector and a reduced-rank filter by using the minimum mean-squared …
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Channel shortening equalizers for UWB receiver design simplification
Ultra Wideband (UWB) communication systems occupy large bandwidths with very low power spectral densities. This feature makes UWB channels highly rich in multipaths. To exploit the temporal diversity, a UWB receiver usually incorporates Rake reception. Each multipath in the channel carries just a …
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Modified location aided routing protocol for UWB manets
… for MANET based on the characteristics of UWB technology. The LocationAided Routing protocol scheme 1 (LARI) was first considered in order to satisfy therequirements of the proposed routing protocol which combines the advantages of the requestzone in LAR and the dynamic extended zones in …
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Measurement and analysis of intra-vehicle UWB channels
1 PDF file (ix, 65 pages)
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Pre-equalization for pre-Rake MISO DS-UWB systems
In recent years, ultra-wideband (UWB) communications has gained tremendous popularity in both research community and industry. The large bandwidth of UWB systems raises new wireless channel effects and consequently unique advantages as well as challenges to be dealt with, compared to conventional …
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Design of RF CMOS Power Amplifier for UWB Applications
… (from 3.1 GHz to 10.6 GHz) for ultra wideband (UWB) technology, interest has been renewed in both academic and industrial circles to exploit this vast spectrum for short range, high data rate wireless applications. The great potential of UWB lies in the fact that it can co-exist with the already …
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On the Development of a Very Fast Simulator for TH-UWB Systems = Sobre el Desarrollo de un Simulador Rápido para los Sistemas TH-UWB
Impulse Radio-Time Hopping-Ultra Wideband (IR-TH-UWB) is a relatively new technology that might have a big effect on improving wireless communication. Multipath resistance, low power, high capacity, coexistence with other systems, ability of penetrating walls are some of the characteristics that …
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High Speed Turbo Tcm Ofdm For Uwb And Powerline System
… delivering high data rate transmission. One of UWB proposals in IEEE P802.15 WPAN project is to use multi-band OFDM system and punctured convolutional codes for UWB channels supporting data rate up to 480Mb/s. The HomePlug Networking system using the medium of power line wiring also selects OFDM …
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Enhancing Reliability, Throughput, and Energy Efficiency in UWB-based Applications
Ultra-wideband (UWB) radios are becoming increasingly popular among researchers due to their unique physical layer characteristics, including high data rates, low power consumption, and precise localization. Despite their potential, the efficiency of UWB networks remains a significant challenge, …
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An enhanced pulse position modulation (PPM) in ultra-wideband (UWB) systems
1 PDF file (ix, 60 pages)
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Pulse Shaping Filter Design and Interference Analysis in UWB Communication Systems
Ultra wideband (UWB) is a promising technology for short range and high-speed wireless communications such as home entertainment, wireless video downloading, wireless LAN, wireless USB and so on. This dissertation studied several important issues in the application of UWB technology and its …
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Investigation into the design of ultra-wideband (UWB) and multi-band antennas
… demands on spectrums for which ultra-wideband (UWB) and multi-band, e.g.: dual-band, techniques are useful. These UWB and multi-band services require UWB and multi-band antenna designs. Motivated by these applications, we first carried out the investigations on the family of square plate …
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An investigation into the viability of UWB as lower-layer for Bluetooth
… with a lower-layer ECMA-368/9 Ultra Wideband (UWB) radio connection. A Bluetooth over Ultra Wideband (BToUWB) system is implemented by channelling an existing compliant Bluetooth connection’s data over an Ultra Wideband Medium Access Control (MAC) and Physical (PHY) layer radio channel. The aim …
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Κυκλώματα υψηλών συχνοτήτων για σύστημα υπερ-ευρείας ζώνης με διαμόρφωση συχνότητας FM-UWB
… τηλεπικοινωνιακού συστήματος υπέρ–ευρείας ζώνης (UWB). Συγκεκριμένα, σχεδιάζονται σε τεχνολογία CMOS 90nm και αναπτύσσονται τα πλέον κρίσιμα κυκλώματα του PLL του FM-UWB πομπού με βάση ένα σύστημα FM-UWB, το οποίο στηρίζεται στη διπλή διαμόρφωση FM ευρείας ζώνης (double wideband FM modulation). …
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Algorithms for indoor localization based on IEEE 802.15.4-2011 UWB and inertial sensors
… the emerging IEEE 802.15.4-2011 ultra wideband (UWB) for indoor localization, and the results demonstrate the accuracy and precision of using time of arrival measurements for ranging applications. A multipath propagation controlling technique is synthesized which considers the relationship …
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