March 4, 2013
Interschool Lab (750 CEPSR)
Speaker: Dr. Visarath In (SPAWAR Systems Center)
The Nonlinear Channelizer is an integrated circuit sized, large parallel array of analog nonlinear oscillators that serve collectively as a broad-spectrum analyzer which can take complex signals containing multiple frequencies and instantaneously lock-on or respond to a received signal in a few cycles. The core technological approach takes advantage of phenomena that are almost universally unique to nonlinear systems: synchronization and coupling topology. These tools are being employed to develop a system capable of locking onto any arbitrary input (RF) signal. The system is efficient, by eliminating the need for high-speed, high-accuracy ADCs, and compact by making use of nonlinear coupled systems to act as a channelizer (frequency binning and channeling), a low noise amplifier, and a frequency down-converter in a single step which, in turn, will reduce the size, weight, power, and cost of the entire communication system. The presentation covers the theory and some engineering details that validate the concept.
Visarath In graduated from Georgia Institute of Technology with a Ph.D. in Physics in 1996. He works in the field of nonlinear dynamics in both theoretical and experimental areas and has in depth experience in the fields relating to mechanical, electronic, and nonlinear sensor systems. Currently, Dr. Visarath In is working on the coupled nonlinear systems with special emphasis on the fluxgate magnetic sensors, electric field sensors, coupled nonlinear gyroscopes for navigation, signal generation & multiple frequency generation systems, and Nonlinear Channelizer System for RF communication. He has over 50 publications and 24 patents.