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 25 for “"Digital Signals"”.
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Modal matching : a method for describing, comparing, and manipulating digital signals
Thesis (Ph. D.)--Massachusetts Institute of Technology, Program in Media Arts & Sciences, 1995.
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ADAPTIVE COHERENT RECEIVERS FOR DIGITAL SIGNALS OVER THE GAUSSIAN CHANNEL WITH UNKNOWN CARRIER PHASE/FADING
… structures for the coherent detection of digital signals transmitted over the Gaussian channel with unknown carrier phase/fading are presented. The two receiver structures concerned are namely the symbol-by-symbol receiver and the sequence estimation receiver while the modulation …
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Design and analysis of digital watermarking, information embedding, and data hiding systems
Digital watermarking, information embedding, and data hiding systems embed information, sometimes called a digital watermark, inside a host signal, which is typically an image, audio signal, or video signal. The host signal is not degraded unacceptably in the process, and one can recover the …
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An analysis of interconnection network effects of dynamic element matching digital-to-analog converters
Digital-to-Analog Converters (DACs) convert digital signals into analog signals and thereby provide the link from digital systems to the analog world. Many DAC architectures use matched components to convert signals. However, practical DACs contain mismatched circuit components that cause nonlinear …
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Real time simulations of EMTP results
… time in a MVME133A computer platform and the digital signals are converted to analog signals through a D/ A board. These analog signals are filtered and provide inputs to the Power Systems Simulator via the power amplifiers. The computer relays, which are being tested, are connected to the …
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Generalized Passive Radar Processing Chain For Use With Different Signals of Opportunity
… Detection and Ranging (radar) that makes use of signals transmitted by Illuminators of Opportunity (IoO)'s to detect targets in a scene. An IoO is any preexisting transmitter that is used as the illuminator for the PR such as Frequency Modulation (FM) radio. The exact performance of a PR depends …
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Signal generation and evaluation using Digital-to-Analog Converter and Signal Defined Radio
In contemporary communication systems, Digital-to-Analog Converters (DAC), Signal Defined Radio (SDR) signal creation, and clock data recovery are essential components. DACs convert digital signals to analog signals, creating continuous waveforms. DACs provide versatility in the transmission of SDR …
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DATA COMPRESSION BY USING SYMMETRICAL COMPONENT TRANSFORM
… the effectiveness of image data compression for digital signals using a new transform method termed the symmetrical com-ponent transform. This transform is based on a previously described matrix expansion of a spatially discrete image termed the symmetrical component expansion. Details of the …
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Co-channel digital signal separation : application and practice
… studies the theory and application of co-channel digital signal separation techniques. We set up a test-bed with the GNU Software Defined Radio (SDR) platform where we implement and experiment with single-antenna signal separation algorithms. We mainly investigate linearly-modulated digital …
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GE-PAC 4020/EAI 580 Hybrid Computing System
… to reap benefits from the strengths of both digital and analog computation. This system welds the capabilities of a GE/PAC<sup>®M/sup> 4020 Process Computer and an EAI® 580 Analog/Hybrid Computing System by means of a special Hybrid Interface. The Hybrid Interface consists of five modules. …
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Algorithms for nuclear data analysis applied to safety and materials
Digital electronics are gradually replacing analog signal conditioning modules in many radiation detection applications. Direct analog-to-digital conversion of radiation-induced signals yields performances comparable to or better than analog electronics, in terms of time and energy resolution. The …
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Geometry-Aware Methodology for Coupling Mechanism Analysis and Radiation Mechanism Analysis
<p>"Due to the wide-band spectrum of digital signals, a variety of noise generators, including microprocessors, liquid crystal displays, digital microphones, high-speed traces, and double-data-rate memory modules, are found in consumer electronics products. Noise generated by digital circuits can …
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Signal Breaker: Fuzzing Digital Signal Processors
… application, fuzzing has yet to make its way to Digital Signal Processor (DSP) software. DSPs sit at the border between hardware and software systems: they transform analog signals external to a system into digital signals for internal processing. Many important societal applications including …
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An Algorithm and System for Measuring Impedance in D-Q Coordinates
… signal conditioning and conversion to and from digital signals with high resolution. The PCB interfaces with the existing Universal Controller hardware. Chapter 4 discusses the analyzer software. Software was written in C++, VHDL, and Matlab to implement the measurement process. This chapter …
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Transmitter and receiver circuits for digital free-space optical interconnect: design and simulation
… receiver circuits is required for integrating digital free space optical interconnects (FSOI) with the mainstream VLSI computing system. These circuits are the interface between on-chip digital signals and the off-chip optical signals, and thus their design and optimization is very important. …
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Contact-type mechanical interfaces for high speed digital interconnects
… contacts on signal integrity for highspeed digital signals. As devices become smaller and clock frequencies increase, new technologies for contacting devices are being developed, especially in the field of semiconductor test. These contactors will be incorporated into a socket or an …
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Guiding Labor: Sensable Instructions through Digital Jigs
… of instruction to an asymmetrical integration of digital technologies. Drawings remain central to architectural practice, yet a widening gap persists between tools for making drawings and tools for interpreting them. Since Alberti’s division between intellectual and productive labor, architectural …
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The design and use of a digital radio telemetry system for measuring internal combustion engine piston parameters.
During the course of this project, a digital radio telemetry system has been designed and shown to be capable of measuring parameters from the piston of an internal combustion engine, under load. The impetus for the work stems from the need to sample the appropriate data required for oil …
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Integrated Filters and Couplers for Next Generation Wireless Tranceivers
… distortions in PA for different analog and digital signals which have been a major concern. The second harmonic injection technique is explored and used to effectively suppress nonlinear distortions. This method consists of simultaneously feeding back the second harmonics at the output of …
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Signal Encoding and Digital Signal Processing in Continuous Time
… signal encoding in, and architectures of, digital signal processing systems that function in continuous time (CT). Unlike conventional digital signal processors (DSPs), which rely on a clock to dictate the sampling times of an analog-to-digital converter (ADC) and to provide the tap delay …
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