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 924 for “"Radio Frequency"”.
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Radio frequency performance
Thesis (M.S.V.S.)--Massachusetts Institute of Technology, Dept. of Architecture, 1982.
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Extensions to Radio Frequency Fingerprinting
Radio frequency fingerprinting, a type of physical layer identification, allows identifying wireless transmitters based on their unique hardware. Every wireless transmitter has slight manufacturing variations and differences due to the layout of components. These are manifested as differences in …
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Route Validation Using Radio Frequency Identification
<p>In recent years, radio frequency identification (RFID) has been proposed and implemented in a variety of applications where tracking objects, animals or people is desirable. This paper proposes a novel approach to the application of RFID technology in those applications where it is possible to …
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The MeerKAT Radio Frequency Interference Environment
Radio signals from astronomical sources are extremely weak and easily distorted/- corrupted or overwhelmed by man-made radio signals such as cellphones, satellites, aircraft and telescope electronics. These Radio Frequency Interference (RFI) are increasingly threatening radio observatories due to …
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Radio frequency digital to analog converter
… should be a multiple (k*fs) of the sampling frequency (f), where k>l. The waveforms can be aligned so that the data switching occurs in the zero regions of the oscillating output. This makes the DAC insensitive to switch dynamics and jitter. The architecture has the additional benefit of …
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Radio frequency dc-dc power conversion
… amenable to circuit designs operating at fixed frequency and duty ratio, considerable easing the circuit design. The thesis also develops new circuit designs that are well suited to these new architectures. As part of this, two new gate drives and control methods are introduced that greatly …
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Security Sphere : radio frequency subsampling receiver
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, June 2002.
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Foundations of Radio Frequency Transfer Learning
… and Deep Learning (DL) techniques into modern radio communications system, a field known as Radio Frequency Machine Learning (RFML), has the potential to provide increased performance and flexibility when compared to traditional signal processing techniques and has broad utility in both the …
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Plasma Processing of Superconducting Radio Frequency Cavities
… plasma processing technology of superconducting radio frequency (SRF) cavities not only provides a chemical free and less expensive processing method, but also opens up the possibility for controlled modification of the inner surfaces of the cavity for better superconducting properties. The …
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Minimal Infrastructure Radio Frequency Home Localisation Systems
The ability to track the location of a subject in their home allows the provision of a number of location based services, such as remote activity monitoring, context sensitive prompts and detection of safety critical situations such as falls. Such pervasive monitoring functionality offers the …
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Microelectromechanical Systems (Mems) for Radio Frequency Applications
The work in this thesis focuses on the development of two of the most fundamental on-chip RF passive devices (tunable capacitors and inductors) using micromachining technology. First, a new wide-tuning-range tunable capacitor design is proposed and prototype devices are fabricated using surface …
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Machine Learning for Radio Frequency Interference Flagging
The field of radio frequency interference (RFI) flagging involves the identification of corrupted data within radio astronomy measurements. This work explores the application of supervised machine learning algorithms for RFI flagging, trained on real measurement data and simulated data with …
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Security approaches for Radio Frequency Identification systems
… of the Electronic Product Code (EPC) class of Radio Frequency Identification (RFID) tags and associated data. RFID systems can be used to improve supply chain performance and automate asset management. However, an antagonist could use the functionality of the RFID tags and the EPC data to …
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Techniques for efficient radio frequency power conversion
A diverse range of radio-frequency (RF) power applications demand RF power generation systems that allow for dynamic output power control while having the capability to efficiently deliver power into a varying load. While some of these existing and emerging applications are characterized with …
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Fabrication of chip-scale radio frequency inductors
… components to boost the performance of the radio frequency transceiver. Accordingly, these inductors offer the potential for substantial improvement in signal quality and reception.
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Phase manipulation for efficient radio frequency transmission
… in 65-nm CMOS, operates over a carrier frequency range of 1.2-4.2 GHz and has a 12-bit phase resolution and sample rate of 160 MSamples/second. The second technique is a novel four-way lossless power combiner and outphasing system which provides ideally lossless power combining along …
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Radio Frequency Identification : regulating information privacy protection
As applications of Radio Frequency Identification (RFID) become more profuse, the technology itself is stirring up some controversy. Due to its potential for amassing large amounts of information about both people and things, and the possibility of using the information for marketing, tracking, or …
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Multifunction Radio Frequency System Design Using Nonlinear Models
Multifunction radio frequency (RF) systems provide a general-purpose hardware platform for designers to implement arbitrary waveform transmission and reception. In this thesis, a multifunction RF transceiver is designed, simulated and tested. The transceiver was designed for radar applications …
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