Now showing items 21-30 of 1032
Coherent and partially coherent CW laser beam propagation in lens-like media: a diffractive ray-theoretic approach
(Virginia Polytechnic Institute and State University, 1977)
A fuzzy logic solution for navigation of the Subsurface Explorer planetary exploration robot
(Virginia Tech, 1997-05-15)
<p>An unsupervised fuzzy logic navigation algorithm is designed and implemented in simulation for the Subsurface Explorer planetary exploration robot. The robot is intended for the subterranean exploration of Mars, and ...
Separation of the common-mode and the differential-mode conducted electromagnetic interference noise
(Virginia Tech, 1994-02-05)
One of the difficulties in solving E:MI problems is the lack of diagnostic tools available. In this thesis work, a tool, called Noise Separator, is developed, which can be used to decipher the differential-mode (DM) noise ...
Enhanced Implementations for Arbitrary-Phase Spread Spectrum Waveforms
(Virginia Tech, 2019-06-18)
The use of practically non-repeating spreading codes to generate sequence-based spread spectrum waveforms is a strong method to improve transmission security, by limiting an observers opportunity to cross-correlate snapshots ...
A study of periodic gratings in planar dielectric waveguides
(Virginia Tech, 1994-12-05)
<p>Periodic gratings in waveguides act as frequency selective mirrors making them very useful as spectral filters for wavelength division multiplexing applications and as end mirrors for narrow linewidth lasers. A study ...
Mach bands, Hermann grid, and lateral inhibition in the retina
(Virginia Tech, 1990-08-06)
<p>Literature about two illusions that are traditionally linked to lateral inhibitory processes in the retina is surveyed. Despite much research and a long history, the Mach bands illusion has not yet been very well-understood. ...
An implementation of an AMPS digital base station with adaptive Automatic Gain Control
(Virginia Tech, 1996-05-17)
<p>We consider the problem of designing a wide-band digital receiver for an Advanced Mobile Phone Service (AMPS) cellular system, and the associated problem of choosing an appropriate Analog-to-Digital (ADC) converter. The ...
Power losses in massive, solid, saturable iron
(Virginia Tech, 1962-06-05)
<p>The results of the representative calculation, tabulated in Table 2, are plotted in Figure 28. Inspection of Figure 28 reveals that without saturation the magnetic intensity decays quite rapidly as we move into the iron. ...
Multiple feed reflector antenna analysis
(Virginia Polytechnic Institute and State University, 1986)
A microprocessor control scheme for switched reluctance motor drives
(Virginia Polytechnic Institute and State University, 1987)