Design of limiting amplifier models for nonlinear amplify-and-forward distributed estimation

Robert Santucci, Mahesh K. Banavar, Andreas Spanias, Cihan Tepedelenlioglu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

This paper describes the design of limiting amplifier models to be used in the implementation of non-linear amplify-and-forward distributed estimation systems. The use of nonlinear amplifiers in amplify-and-forward distributed estimation can yield significant gains in sensor power efficiency compared to the more conventional linear amplifiers. To ensure similar compression characteristics across all individual sensors and thus allow the receiver to perform estimation, predistortion is utilized to fit all amplifiers to a common shaping function similar to their inherent compression characteristics. When designing this shaping function, knowledge of the receiver noise and the accuracy of the amplifier predistortion is critical to estimating system performance. Analytical expressions for the asymptotic variance are derived for two non-linear amplifier models. The two models analyzed are the scaled hyperbolic tangent and the Cann model. It is found the Cann model with low sharpness can improve power added efficiency in a distributed estimation system. A set of Java-DSP functions is introduced to aid in teaching predistortion design tradeoffs.

Original languageEnglish (US)
Title of host publication2013 18th International Conference on Digital Signal Processing, DSP 2013
DOIs
StatePublished - Dec 6 2013
Event2013 18th International Conference on Digital Signal Processing, DSP 2013 - Santorini, Greece
Duration: Jul 1 2013Jul 3 2013

Publication series

Name2013 18th International Conference on Digital Signal Processing, DSP 2013

Other

Other2013 18th International Conference on Digital Signal Processing, DSP 2013
CountryGreece
CitySantorini
Period7/1/137/3/13

ASJC Scopus subject areas

  • Signal Processing

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    Santucci, R., Banavar, M. K., Spanias, A., & Tepedelenlioglu, C. (2013). Design of limiting amplifier models for nonlinear amplify-and-forward distributed estimation. In 2013 18th International Conference on Digital Signal Processing, DSP 2013 [6622749] (2013 18th International Conference on Digital Signal Processing, DSP 2013). https://doi.org/10.1109/ICDSP.2013.6622749