Browsing Electrical and Computer Engineering by Title
Now showing items 935-954 of 1976
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Investigation of Channel Reciprocity for OFDM TDD Systems
(University of Waterloo, 2009-10-02)This dissertation investigates the assumption of channel reciprocity in orthogonal frequency division multiplexing (OFDM) systems using time-division duplex (TDD) access. Within TDD systems uplink and downlink transmission ... -
Investigation of charge-exciton interactions and their correlations with the device efficiency and operational stability in Phosphorescent Organic Light Emitting Devices by studying delayed electroluminescence
(University of Waterloo, 2013-09-11)Phosphorescent OLEDs (PHOLEDs) have gained a lot of attention due to their remarkable capability of achieving nearly 100% internal quantum efficiency. Although PHOLEDs are a promising technology for the development of high ... -
Investigation of Current Sensing Using Inherent Resistance
(University of Waterloo, 2010-05-20)A novel method of current sensing using resistance of power delivery path is introduced as a mean to measure static or dynamic load current in high-power system-on-chips, where conventional methods deemed inadequate. It ... -
Investigation of Electroluminescence Degradation in Anthracene-based Organic Light-Emitting Devices
(University of Waterloo, 2010-09-29)Organic light-emitting devices (OLEDs) have attracted significant attention because of their unique advantages for flat panel display applications. However, the relatively limited electroluminescence (EL) stability of blue ... -
Investigation of High Frequency Switching Transients on Wind Turbine Step Up Transformers
(University of Waterloo, 2015-09-28)Pre-mature failures of wind turbine step up (WTSU) transformers have been reported in the wind farms although, the failed transformers had previously passed all quality assurance tests and had assembled all standard ... -
Investigation of MoO3 as an electron injection contact and as a charge transport material in transparent organic light emitting devices
(University of Waterloo, 2011-08-24)MoO3 is investigated for its utilization as a transparent cathode and as a charge transport material in transparent organic light emitting devices. As a transparent cathode, MoO3 is utilized in combination with a thin metal ... -
Investigation of RF Direct Detection Architecture Circuits for Metamaterial Sensor Applications
(University of Waterloo, 2011-01-19)Recent advances in metamaterials research has enabled the development of highly sensitive near-field microwave sensors with unprecedented sensitivity. In this work, we take advantage of the increase in the sensitivity to ... -
Investigation of Time Domain Modulation and Switching-Mode Power Amplifiers Suitable for Digitally-Assisted Transmitters
(University of Waterloo, 2010-09-22)Innovation in wireless communication has resulted in accelerating demand for smartphones using multiple communications protocols such as WiFi, Bluetooth and the many cellular standards deployed around the world. The variety ... -
An Investigation on Passive Inter-Modulation generated by antenna contact
(University of Waterloo, 2017-09-06)In modern day handheld cellular devices, low-profile is a key design target. In addition, with the introduction of 4G protocols, the number of cellular bands has increased significantly and the simultaneous transmission ... -
Investigation on performance enhancement of micro-sized IR photodetectors
(University of Waterloo, 2021-09-16)As an Infrared detector with high responsivity, high transmission speed, and low dark current, InP/InGaAs p-i-n photodetectors (PD) have been used as a promising technology for many applications, including optical communication ... -
Investigation on the Compress-and-Forward Relay Scheme
(University of Waterloo, 2012-01-20)The relay channel plays an integral role in network communication systems. An intermediate node acts as a relay to facilitate the communication between the source and the destination. If the rate of codewords is less than ... -
Investigations into Impedance Tuners for the Next Generation of Communication Systems
(University of Waterloo, 2023-01-03)Novel communication systems, including 5G and the upcoming 6G cellular networks and software defined/cognitive radio technologies, call for compact, multi-band, and reconfigurable circuit components. Specifically, stringent ... -
Investment Planning Models and Optimal Incentive Design for System Planners and Investors to Integrate Renewables
(University of Waterloo, 2014-08-14)Emissions from fossil fuel based energy sources is a global concern with respect to environmental degradation. Thus, a diversification of energy sources in the supply mix of power systems to include renewable sources of ... -
IP Mobility Support in Multi-hop Vehicular Communications Networks
(University of Waterloo, 2012-08-28)The combination of infrastructure-to-vehicle and vehicle-to-vehicle communications, namely the multi-hop Vehicular Communications Network (VCN) , appears as a promising solution for the ubiquitous access to IP services in ... -
Issues in Implementation of Public Key Cryptosystems
(University of Waterloo, 2006)A new class of moduli called the low-weight polynomial form integers (LWPFIs) is introduced. LWPFIs are expressed in a low-weight, monic polynomial form, <em>p</em> = <em>f</em>(<em>t</em>). While the generalized ... -
Joint Compression and Digital Watermarking: Information-Theoretic Study and Algorithms Development
(University of Waterloo, 2006)In digital watermarking, a watermark is embedded into a covertext in such a way that the resulting watermarked signal is robust to certain distortion caused by either standard data processing in a friendly environment or ... -
Joint Compression and Watermarking Using Variable-Rate Quantization and its Applications to JPEG
(University of Waterloo, 2009-01-27)In digital watermarking, one embeds a watermark into a covertext, in such a way that the resulting watermarked signal is robust to a certain distortion caused by either standard data processing in a friendly environment ... -
Joint Source Channel Coding in Broadcast and Relay Channels: A Non-Asymptotic End-to-End Distortion Approach
(University of Waterloo, 2013-09-25)The paradigm of separate source-channel coding is inspired by Shannon's separation result, which implies the asymptotic optimality of designing source and channel coding independently from each other. The result exploits ... -
Just-In-Time Push Prefetching: Accelerating the Mobile Web
(University of Waterloo, 2011-09-19)Web pages take noticeably longer to load when accessing the Internet using high-latency wide-area wireless networks like 3G. This delay can result in lower user satisfaction and lost revenue for web site operators. By ... -
Kernelized Supervised Dictionary Learning
(University of Waterloo, 2013-04-25)The representation of a signal using a learned dictionary instead of predefined operators, such as wavelets, has led to state-of-the-art results in various applications such as denoising, texture analysis, and face ...