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 935 for “"Communication Systems"”.
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Subscriber Access Communication Systems
… fibre based products. The area of the telecommunications network identified as offering the best opportunity to pursue this strategy was the local access loop of various Post and Telecommunications (P&T) authorities around the world.The thesis identifies two market segments where the …
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Advanced Quantum Communication Systems
… we have improved several resources for quantum communication and quantum computing. Specifically, we have developed improved sources of polarization-entangled photons, a low-loss quantum memory for polarization qubits, and a quantum random number generator. These tools may be applied to a wide …
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Designing complementary communication systems
… to improving face-to-face contexts is to add new communication channels - a strategy often described as creating "backchannels." In my work, I use a series of novel complementary communication systems to show how adding communication platforms to collaborative situations can be useful while also …
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Simulation of Communication Systems
Digital communications and computers are having a tremendous impact on the world today. In order to meet the increasing demand for digital communication services, engineers must design systems in a timely and cost-effective manner. The number of technologies available for providing a given service …
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Intelligent management for next generation communication systems - communication systems policies for delivering fresh information
Many Internet of Things (IoT) applications require information to be received and decision-making made in a timely manner. The Age-of-Information (AoI) metric has been proposed to measure and evaluate the freshness of information. Afterwards, a new metric was proposed, named Peak AoI (PA), which …
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Location Estimation in Wireless Communication Systems
… of reference nodes available in the target's communication range. In this circumstance, we finally utilize the internal sensors in today's smartphones to provide additional information for localization purpose, and propose a novel algorithm which can combine the location dependent parameters …
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Amplifier Architectures for Wireless Communication Systems
<p>Ever-increasing demand in modern wireless communication systems leads researchers to focus on design challenges on one of the main components of RF transmitters and receivers, namely amplifiers. On the transmitter side, enhanced efficiency and broader bandwidth over single and multiple bands on …
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ARQ Techniques for MIMO Communication Systems
Multiple-input multiple-output (MIMO) communication systems employ multiple antennas at the transmitter and the receiver. Multiple antennas provide capacity gain and/or robust performance over single antenna communications. Traditional automatic-repeat-request (ARQ) techniques developed for …
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Dark solitons in optical communication systems
… use of dark optical solitons as data carriers in communications systems. The background chapters provide an introduction to nonlinear optics, and to dark solitons, described as intensity dips in a bright background, with an asymmetrical phase profile. The motivation for the work is explained, …
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Distributed control of computer communication systems
Flow control in Computer Communication systems is generally a multi-layered structure, consisting of several mechanisms operating independently at different levels. Evaluation of the performance of networks in which different flow control mechanisms act simultaneously is an important area of …
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New Techniques for Multicarrier Communication Systems
Common to all OFDM systems is a large peak-to-average-power ratio (PAR) problem, which can lead to low power efficiency and nonlinear distortion at the transmit power amplifier. Tone reservation uses unavailable or reserved tones to design a peak-cancelling signal that lowers the PAR of a transmit …
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Noise Metrology in Optical Communication Systems
… towards autonomous and plug-and-play optical systems require of research, development and implementation for the requirements of this paradigm shift. This PhD thesis addresses the problem of noise estimation in optical communication systems. This topic is of critical importance since a better …
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Photonic quantum computers and communication systems
… problems in computing, sensing, and secure communication. There has been growing interest in photonic implementations of quantum processors as they offer relatively long coherence lengths, precise state manipulation, and efficient measurement. In this thesis, we first present experimental …
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Generating communication systems through shared context
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
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Distributed Reconfigurable Simulation for Communication Systems
The simulation of physical-layer communication systems often requires long execution times. This is due to the nature of the Monte Carlo simulation. To obtain a valid result by producing enough errors, the number of bits or symbols being simulated must significantly exceed the inverse of the bit …
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Automated Testbench Generation for Communication Systems
… to generate testbenches for VHDL models of communication systems. To illustrate the methods, a VHDL model was constructed for the speech-coding channel of the Global System for Mobile Communication (GSM). GSM is the Pan-European digital mobile telephony standard specified by the European …
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Optical Communication Systems for Smart Dust
In this thesis, the optical communication systems for millimeter-scale sensing and communication devises known as "Smart Dust" are described and analyzed. A smart dust element is a self-contained sensing and communication system that can be combined into roughly a cubic-millimeter mote to perform …
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