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 “"signal generator"”.
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Design of a 1-200 MHz signal generator
… project is to design and develop a wideband RF signal generator with a frequency range of 1 - 200MHz to the following specifications: • output at 50Q • stable output • signal amplitude control • continuously variable frequency range up to VHF band • AM modulation capability In this project, the …
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A GPS Signal Generator Using a ROACH FPGA Board
<p>A Global Positioning System (GPS) signal simulator is a valuable testing tool. It allows for testing of GPS receivers, systems, and anti-spoofing algorithms. With the increased popularity of software defined radios (SDRs) merging GPS signal simulators and SDRs is a natural choice. A detailed …
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Thermoelectric Cooler Based Temperature Controlled Environment Chamber Design for Application in Optical Systems
… assembly -- including a digitally implemented signal generator, an error correction controller, and the environment chamber heat sink structure. The signal generator is used as input for a switched-mode based Peltier driver found commercially. A feedback error controller compensates the driver …
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Design of anechoic chamber instrumentation and data acquisition module for testing and analysis of the CTHA
… and vice versa, to transmit and receive the signals. The effectiveness of a communication system depends largely on the effectiveness of the antenna used in them. The effectiveness of an antenna is characterized by its electromagnetic field. Methods to characterize the field of an antenna …
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High-Performance CMOS Front-End ASICs for SiPM Detectors and High-Frequency Ultrasound and Photoacoustic Imaging
… The slow-rising edge of standard SiPM signal, however, makes the timing measurement sensitive to noise and leads to poor timing resolution. Besides, the SiPM energy measurement utilizing charge-sensitive amplifiers suffers from high power consumption and is not suitable for array-based …
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Predictive energy managament strategy for a parallel hybrid electric vehicle
… is achieved using a predictive reference signal generator (pRSG) in combination with a non-predictive reference tracking controller for the battery SoC. The pRSG computes the desired battery SoC trajectory as a function of vehicle position such that the recuperated energy is maximized …
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A SEIR-based ADC built-in-self-test and its application in ADC self-calibration
… stringent linearity requirement for an on-chip signal generator has made it prohibitive. The stimulus error identification and removal (SEIR) method has greatly reduced the linearity requirement. However, it requires a highly stable voltage offset, which remains a daunting task. This work …
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Design of an Ultra-Wideband Frequency-Modulated Continuous Wave Short Range Radar System for Extending Independent Living
… (SRR) system, which uses ultra-wideband (UWB) signals can provide immediate assistance by monitoring and detecting fall events. The unique characteristics of this system allow for a frequency-based modulation system to carry out triangulation and sense the location of the fall through the usage …
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Online position control system using incremental fuzzy control
… real-time session with DC motor. For simulation, signal generator used as the reference input in the form of square wave. The best gains used for the IFLC in simulation are: gain of error (GE) is 2.721, gain of change error (GCE) is 0.019 and gain of output (GCU) is 0.259. While real-time …
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Fibre Modification for Concrete Reinforcement using a Novel Atmospheric Microwave Induced Plasma Torch (MIPT)
… at 5.8GHz was used. The system uses a microwave signal generator connected to a traveling wave tube to provide the required power. The applicator consists of a nozzle section and a tuning section to decrease the reflected power. Argon gas flows through the copper nozzle, and the high electrical …
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Implementation of Real-Time Software Receiver for Gps or Glonass L1 Signals
… a real-time correlator for the GLONASS L1 signals. This software receiver is going to be used for scientific research and education. This work is a part of the ongoing effort to develop a low-cost, flexible, and capable GNSS receiver for use as a scientific instrument and for GNSS receiver …
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Active structural acoustic control of aircraft interior flow noise via the use of active trim panels
… off-line optimizations. The control reference signal was obtained from either an accelerometer mounted on the skin of the aircraft or from the signal generator itself. Control was executed on a personal computer digital signal processing. Single frequency control experiments were performed to …
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Digital Readout and Control of a Superconducting Qubit
… utilize microwave frequency control signals, and heterodyne based detection schemes for measurement. Both of these techniques rely heavily on room temperature microwave generators, high-bandwidth lines from room temperature to millikelvin temperatures, and bulky non-reciprocal …
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Plasma position control in the STOR-M tokamak : a fuzzy logic approach
… plasma position controller and an Arbitrary Signal Generator developed by the author was evaluated. This modified plasma position controller was applied successfully to the STOR-M tokamak during both normal mode and A.C. mode operation. In both cases, the modified controller provided adequate …
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Measurement of particle interaction properties for the incorporation into Discrete Element Methods
… using digital strobes controlled by a signal generator. The heights of the colliding particles are adjusted to vary the drop velocities prior to collision. The measured relative velocities arc applied in rigid body theory of binary impact to extract the required material interaction …
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Microwave techniques and applications for semiconductor quantum dot mode-locked lasers
… diverse waveform generation, and microwave signal generation. However, there are still several challenges to conquer for engineering applications. Semiconductor MLLs sources have generally not been able to match the noise performance and pulse quality of the best solid-state mode-locked …
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Technoeconomic Assessment of a Gossamer, Planar, Gigawatt-Scale Space-Based Solar Power System
… the efficiency-to-areal-density ratio of the RF signal generator and transmission antenna by leveraging miniaturization techniques to unify the two components into a compact, cohesive module. Alternatively, a new set of materials should be explored for all three components through ongoing …
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The response of box-type structures to vibration.
… excitation using pseudo-random binary sequence signals to determine response to random excitation using narrow band frequency analysis and correlation techniques. The experimental apparatus and techniques used, including the development of a non-contacting combined exciter pickup probe, are …
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Characterization of redundant UHF communication systems for CubeSats
… is 401 MHz downlink, 450 MHz uplink and both signals have a bandwidth of 20 kHz. The primary and backup radios are both UHF-band, which means there is a risk of the radios damaging each other on orbit that we must factor into design and testing. After presenting the process of determining the …
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Photovoltaic Source Simulators for Solar Power Conditioning Systems: Design Optimization, Modeling, and Control
… and the dynamic characteristic of actual PV generator. Four major design features should be adopted in any PV source simulator: (i) high power-stage efficiency, (ii) fast transient response-time, (iii) output impedance matching with actual PV generator, and (iv) precise reference generation …
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