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Now showing items 31-40 of 96
The application of fiber optic sensors to the monitoring of roller element bearing systems
(Texas A&M University, 2002)
A rotating machinery test rig was instrumented with fiber optic Fabry-Perot Interferometer (FFPI) strain sensors for condition monitoring of rolling element bearings. Wavelength division multiplexing (WDM) was utilized to ...
The role of unbiased perturbations towards providing estimator robustness with pragmatic geometric methods
(Texas A&M University, 2002)
Robustness of a system has been defined in various ways and a lot of work has been done to model the robustness of a system, but quantifying or measuring robustness has always been very difficult. In this research, we ...
Decision-feedback multiple differential detection for space-time coded OFDM systems
(Texas A&M University, 2001)
Differential detection (DD) is an attractive simple technique in flat-fading environments since it is very robust and does not require carrier phase tracking. However, performance of the conventional DD method in flat-fading ...
Distinguishing congestion and error losses: an ECN/ELN based scheme
(Texas A&M University, 2001)
TCP is the widely used protocol on the Internet because of its reliability and congestion control mechanisms. TCP congestion control works by reducing the TCP sender's congestion window whenever there is a packet loss. But ...
Comparison of direct sequence and multicarrier CDMA systems employing multiuser detectors
(Texas A&M University, 2002)
In CDMA, users in a given cell transmit simultaneously in the same frequency band. Two ways to spread the spectra of users' signals have been considered in this work. In the first technique, called Direct Sequence (DS) ...
A very high frequency CMOS Variable Gain Amplifier
(Texas A&M University, 2001)
A fully differential CMOS Variable Gain Amplifier (VGA) consisting of an analog multiplier, current gain stages, and resistor loads is designed for very high frequency applications. The gain can be programmed from 0dB to ...
An analysis of test effectiveness via surrogate simulation of a commercial IC
(Texas A&M University, 2001)
Choosing which test sets to apply to a commercial design is important in order to efficiently achieve low defective part levels. This work compares a test set created by the DO-RE-ME process utilizing the MPG-D defective ...
New orthogonal space-time block codes with full diversity
(Texas A&M University, 2002)
It has been shown from the Hurwitz-Radon theorem that square complex orthogonal space-time code designs cannot achieve full diversity and full rate simul-taneously, except in the two transmit antenna case. However, this ...
Parameter estimation of vector controlled induction machine
(Texas A&M University, 2002)
This thesis deals with the modeling and control of induction machine under indirect vector control with parameter estimation in order to get better field oriented performance. Because of its excellent decoupled control, ...
Bayesian wavelet shrinkage in transformation based linear models
(Texas A&M University, 2002)
Most of the noise models in signal processing are either additive or multiplicative. However, the widely held wavelet shrinkage estimators for signal denoising deal only with additive noise. In this thesis, a new Bayesian ...