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Analysis, Design and Performance Evaluation of Optical Fiber Spectrum-Sliced WDM Systems
(Virginia Tech, 1997-06-03)
This dissertation investigates the design and performance issues of a recently demonstrated technique, termed as spectrum-slicing, for implementing wavelength-division-multiplexing (WDM) in optical fiber systems. Conventional ...
Diffraction by Building Corners at 28 Ghz: Measurements and Modeling
(Virginia Tech, 1998-06-03)
This thesis presents the results of a 28 GHz continuous-wave (CW) diffraction measurement campaign in the Washington, DC area. It describes the measurement approach including information on equipment and testing methods. ...
IVDS System: Channel Simulation and Repeater Unit Design
(Virginia Tech, 1996-03-01)
In this thesis, an Interactive Video Data Service (IVDS) is developed. This service provides a mechanism for television viewers to interact with the program they are watching. Possible interactions include purchasing ...
Low Voltage High Current Power Conversion with Integrated Magnetics
(Virginia Tech, 1998-04-27)
Very low voltage, high current output requirement have necessitated improvements in power supply's density and efficiency. Existing power conversion techniques cannot meet very stringent size and efficiency requirements. ...
On-Line Transient Stability Analysis of a Multi-Machine Power System Using the Energy Approach
(Virginia Tech, 1997-07-15)
This thesis investigates and develops a direct method for transient stability analysis using the energy approach [1] and the Phasor Measurement Units (PMUs). The originality of this new method results from a combination ...
Adaptive Control using IIR Lattice Filters
(Virginia Tech, 1998-04-24)
This work is a study of a hybrid adaptive controller that blends fixed feedback control and adaptive feedback control techniques. This type of adaptive controller removes the requirement that information about the disturbance ...
Electronic Signal Processing in an Optical Fiber-Based Magnetometer
(Virginia Tech, 1997-09-11)
Conventional Extrinsic Fabry-Perot Interferometric (EFPI) sensors have been used to measure a variety of physical parameters like temperature, pressure and strain. A modified version of this geometry is successfully ...
Adaptive Predictive Feedback Techniques for Vibration Control
(Virginia Tech, 1998-02-03)
In this dissertation, adaptive predictive feedback control is used to suppress plate vibrations. The adaptive predictive controller consists of an on-line identification technique coupled with a control scheme. Various ...
Three-Dimensional Fluorescence Microscopy by Optical Scanning Holography
(Virginia Tech, 1997-12-02)
As three-dimensional (3D) imaging and fluorescence techniques become standard in optical microscopy, novel approaches to 3D fluorescence microscopy are emerging. One such approach is based on the incoherent holography ...
Adaptive Equalization for Indoor Channels
(Virginia Tech, 1998-08-03)
This thesis describes the use of adaptive equalization techniques to compensate for the intersymbol interference (ISI) that results when digital data is transmitted over a multipath radio channel. The equalization structures ...