[UCI-Calit2] Chaos-Based Information Technologies

[Anna Lynn Spitzer]

Title:                            Chaos-Based Information Technologies:
Introduction, Survey, & Assessment

 

 

Speaker:                      Christopher P. Silva, senior engineering
specialist, Electronics Research Laboratory, The Aerospace Corporation 

 

 

Time:                           11 a.m. - noon 

 

 

Date:                           Friday, Feb. 20, 2009

 

 

Location:                     Engineering Tower, Room 331

 

 

Abstract:                      The evolution of the new discipline of
nonlinear engineering is taking place along two main fronts: the first
addressing higher-order effects that have become more important in
current designs because of increased demands on performance under
ever-more stringent application environments, while the second, more
radical activity, has focused on the explicit harnessing of nonlinear
effects through whole new designs. For the latter scenario, the most
studied nonlinear effect is that of the complex, random-like behavior
called "chaos," which is now being applied to such diverse areas as
communications, signal processing, fluid mechanics and physiology. The
field of nonlinear engineering is still evolving on many fronts, with
many international and interdisciplinary contributors. Although several
important applications have been developed and demonstrated, the field
is still relatively unexplored and rich with many opportunities for
important practical applications to real-world problems.

 

This presentation will focus on the application of chaos to the
efficiency, reliability and especially security of information
processing and transfer. It will begin by addressing the emergence of
nonlinear engineering, followed by the basics of nonlinear dynamics,
chaos and chaotic synchronization. Next, a survey and assessment of many
potentially important chaos-based communications, radar, and signal
processing applications will be covered, including several areas that
have disruptive potential for performance improvement. An ongoing effort
at The Aerospace Corporation to develop and demonstrate a high
frequency, chaos-based communications system will then be highlighted.
This effort consists of three successive stages, namely, the development
of a high-frequency chaotic oscillator, a synchronization system based
on this oscillator, and finally the modulation of this oscillator to
form a complete communications system. Recent progress on the first two
stages of the development will be covered, including the successful
experimental demonstration of a novel chaotic oscillator with bandwidths
of 2 GHz and beyond, thus enabling a wide variety of the aforementioned
chaos-based applications (e.g., stealth radar and information/image
encryption). The presentation will conclude with a live chaotic circuit
demonstration that serves to illuminate some of the nonlinear effects
discussed in the talk.

 

Bio:                              Christopher P. Silva received the
B.S., M.S., and Ph.D. degrees, all in electrical engineering, in 1982,
1985, and 1993, respectively, from the University of California,
Berkeley.  Professor Leon O. Chua directed his graduate work with an
emphasis on nonlinear circuit and system theory.  His dissertation work
concerned the analytical detection of chaotic dynamics in nonlinear
circuits, which included a detailed rigorous study of the qualitative
dynamics of both the well-known double-scroll chaotic circuit and
second-order analog phase-locked loops.

He joined the Electronics Research Laboratory of The Aerospace
Corporation in 1989 and is currently a senior engineering specialist in
the Communication Electronics Department, Communications & Networking
Division.  He has been the principal or co-investigator on several
internally funded research projects addressing nonlinear microwave CAD,
private/secure communications and radar by means of chaos, stability
analysis of nonlinear circuits, and the measurement, modeling, and
compensation of nonlinear satellite communications channels, the latter
of which has become an advanced technology development for several
military space programs.  He has given many invited talks at
conferences, society meetings, universities, industry and laboratories
on the applications of nonlinear techniques to communications and signal
processing, along with corresponding publications in various venues.

 

Silva is a Fellow of IEEE, a senior member of AIAA, and a member of
AAAS, AMS, and SIAM.

 

Additional Info:             Sponsored by UCI's Department of Electrical
Engineering and Computer Science 

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