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 226 for “"multichannel"”.
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Modelling of Multichannel GaN Transistors
… device performance. Further research extends to multichannel HEMTs, establishing a multichannel simulation platform to investigate the complexities of channel control and carrier generation within GaN-based doped multichannel superjunction (SJ) structures. The simulations reveal sequential …
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Multichannel Wireless Networks: Capacity and Protocols
… we have established the asymptotic capacity of multichannel wireless networks with varying number of channels and interfaces. Capacity analysis has shown that it is feasible to effectively use a large number of channels even with only a few interfaces per node. Based on insights from the …
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Adaptive noise cancellation using multichannel lattice structure.
This thesis presents a multichannel adaptive noise cancellation technique (MCLS) for cancelling the noise over nonlinear transmission channel. The technique applies to the situation in which the reference signal and noisy primary signal are collected simultaneously. The coefficients of the …
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Multichannel blind deconvolution in underwater acoustic channels
… thesis developed new techniques for solving the multichannel blind deconvolution problem and implemented these techniques in acoustic waveguide multiple environment. We developed a systematic way to build an efficient and accurate channel models incorporating a priori information about the …
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Performance of multichannel fiber optic parametric amplifier
Optical networks have a significant role to play in the present and future global telecommunication networking scenario due to the increasing demand for larger transmission capacity. In fiber optic communication systems, Dense Wavelength Division Multiplexing (DWDM) is very popular in which …
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Multichannel Communication and Graph Vertex Labeling Problems
Depending on the type of data, error measure, and type of failure, the problem of designing these encoding schemes is equivalent to several classical problems in graph theory. For example, no-redundancy encodings that minimize maximum absolute error for complete loss of data correspond to the …
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Multichannel Methods for Restoration in Computed Imaging
… common thread in both problems is their inherent multichannel nature, i.e., both exhibit special structure due to the redundancy provided by multiple signal measurements. By explicitly exploiting the multichannel structure, novel algorithms are developed offering improved restoration performance. …
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Multiple access protocols for multichannel communication systems
… study two areas regarding multiple access on multichannel communication systems. First, we describe fundamental multiplexing techniques that we can build upon and investigate the performance of different candidate architectures for the transmission of messages from bursty sources on multiple …
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Capacity assignment in non-switching multichannel networks
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1988.
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Multichannel inverse filtering of machinery vibration signals
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1983.
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Wavelet based design of digital multichannel communications systems
… information. We have studied the design of multichannel communication scheme exploiting the mathematical theory of wavelets. Such a theory, developed recently, has had a great impact in many fields of engineering and of other scientific disciplines. In particular, wavelet theory has become …
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Multichannel Sense and Avoid Radar for Small UAVs
… investigates the feasibility of creating a multichannel sense and avoid radar system for small fixed-wing UAVs (also known as sUAS or drones). The target sUAS is a 40% Yak-54 remote controlled aircraft with a typical payload of 10 lbs. Small UAS’s such as these are increasing in popularity …
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Analysis, Design and Implementation of Multichannel Audio Systems
… the analysis, design and implementation<br/>of multichannel audio systems. The design objective is to reconstruct<br/>a given sound eld such that it is perceptually equivalent to the<br/>recorded one. A framework for the design of circular microphone arrays<br/>is proposed. This framework is …
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Blind Multichannel Image Deconvolution and Optimum Sparse Approximations
The second problem is one of computing maximally sparse elements of a convex, compact set. This problem arises in a wide range of engineering applications, including regularization of ill-posed problems, design of digital filters with few non-zero coefficients and the computation of sparse …
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Source characterization using linear transformations of multichannel biomagnetic recordings
… offer completely non-invasive and non-contact multichannel recordings with millisecond temporal resolution that provide the direct assessment of the functional dynamics of the brain, via magnetoencephalography (MEG), and heart, via magnetocardiography (MCG). Dense-array biomagnetometers have …
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A digital signal processing solution for multichannel base stations
… produces a cheaper, smaller and more flexible multichannel base station transmitter design. The main design challenges of the new DSP low power combining architecture are the multichannel combining algorithm, the frequency translation of the multichannel signal to radio frequency, the Digital …
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Applications of nonuniform sampling in wideband multichannel communication systems
This research is an investigation into utilising randomised sampling in communication systems to ease the sampling rate requirements of digitally processing narrowband signals residing within a wide range of overseen frequencies. By harnessing the aliasing suppression capabilities of such sampling …
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Analyzing performance of SIC with multiple power multichannel Aloha
… (SIC) when used with multiple power, multichannel Aloha. We use the fluid model to analyze the performance of the system under various circumstances. We also simulate the performance of a SIC system over a single channel. SIC increases the throughput of a multiple power system up to …
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Traffic control in a multichannel optical fiber communication network
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1988.
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