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Full-Text Articles in Engineering

Cognitive Anti-Jamming Framework With Self-Interference Cancellation On A Wideband Autonomous Cognitive Radio, Stephen J. Machuzak Apr 2017

Cognitive Anti-Jamming Framework With Self-Interference Cancellation On A Wideband Autonomous Cognitive Radio, Stephen J. Machuzak

Electrical and Computer Engineering ETDs

With crowded usage of the wireless spectrum, full-duplex wireless systems are introduced to increase bandwidth efficiency by transmitting and receiving on the same frequency band at the same time. Full-duplex communication is a promising solution for greater wireless communications efficiency but, it requires solving the problem of self-interference. Self- Interference cancellation is the process of canceling a radio’s own transmission signal that interferes with its sensed signal which can block desired outside signals of interest. The focus of this thesis is to design and implement a novel self-interference cancellation method for the Wide-band Autonomous Cognitive Radio (WACR) with anti-jamming abil- …


Design Of An O-Type Metamaterial Slow Wave Structure For High Power Microwave Generation, Sabahattin C. Yurt Mar 2017

Design Of An O-Type Metamaterial Slow Wave Structure For High Power Microwave Generation, Sabahattin C. Yurt

Electrical and Computer Engineering ETDs

The aim of this dissertation is to design a novel metamaterial slow wave structure (MSWS) for high power microwave (HPM) generation which is an efficient and compact new generation O-type device whose output parameters are comparable to, and even better than conventional devices. There is increasing interest in using metamaterials for designing HPM sources because of their so-called unique electromagnetic properties that are not found in nature, such as below cutoff propagation, which is the main property that allows for a compact design, and negative refractive index that allows backward wave propagation and reversed Cerenkov radiation. As such new beam/wave …


Intelligent Roic For Real-Time In-Pixel Image Processing, Mohammad J. Ghasemibenhangi Feb 2017

Intelligent Roic For Real-Time In-Pixel Image Processing, Mohammad J. Ghasemibenhangi

Electrical and Computer Engineering ETDs

As the resolution of current image sensors is increasing and the readout electronics is getting faster, the amount of data produced by these imagers is becoming excessively large to store, transmit, and analyze. As a result, sparse data representation has become an interesting research topic in the last few years. Human eye contains millions of photoreceptors, however, only some sparse data is transmitted to the optic nerves. Image processing techniques implemented on a chip and at the pixel level is the main building blocks for retina-like sensors. In this way, instead of transmitting raw images that require massive storage, and …