Summary

Proceedings of the 2013 International Symposium on Nonlinear Theory and its Applications

2013

Session Number:A3L-D

Session:

Number:106

Nonlinear Channelizer: A Frequency Agile and Adaptive Receiver for RF Communication

Visarath In,  Patrick Longhini,  Andy Kho,  Brian K. Meadows,  Antonio Palacios,  

pp.106-109

Publication Date:

Online ISSN:2188-5079

DOI:10.15248/proc.2.106

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The Nonlinear Channelizer is an integrated circuit made up of large parallel arrays of analog nonlinear oscillators which has the ability to receive complex signals containing multiple frequencies. The concept is based on the generation of internal oscillations in coupled nonlinear systems that do not normally oscillate in the absence of coupling. In particular, the system consists of unidirectionally coupled (overdamped) bistable nonlinear elements, where the frequency and other dynamical characteristics of the emergent oscillations depend on the system's internal parameters and the received signal. These properties and characteristics are employed to develop a system capable of locking onto any arbitrary input Radio Frequency (RF) signal over a wide bandwidth. The developed system is efficient by eliminating the need to rely on high-speed, high-accuracy Analog-to-Digital Converters (ADC's), 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. In addition, configuring the channel's attributes in terms of its location in the spectrum and its bandwidth are done with the simple controls of the coefficients of the nonlinear terms in the system via resistor settings which can afford the system the flexibility to reconfigure the channels' characteristics through command lines. This paper covers the summary of the work by discussing the concept of the nonlinear channelizer, the dynamics of the system and its associated bifurcations that give rise to the behaviors used for channeling, and finally the experimental results for a system operating between 500 MHz to 4 GHz. The complete detail of the work and the engineering details are reported in the journal paper [1].

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