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Nonlinear distributed sensing for closed-loop control over Gaussian channels
KTH, School of Electrical Engineering (EES), Communication Theory.
KTH, School of Electrical Engineering (EES), Communication Theory.
KTH, School of Electrical Engineering (EES), Communication Theory.
KTH, School of Electrical Engineering (EES), Communication Theory.ORCID iD: 0000-0002-7926-5081
2011 (English)In: Communication Technologies Workshop (Swe-CTW), 2011 IEEE Swedish, IEEE conference proceedings, 2011, 19-23 p.Conference paper (Refereed)
Abstract [en]

A scenario of distributed sensing for networked control systems is considered and a new approach to distributed sensing and transmission is presented. The state process of a scalar first order linear time invariant dynamical system is sensed by a network of wireless sensors, which then instantaneously transmit their measurements to a remotely situated control unit over parallel Gaussian channels. The control unit aims to stabilize the system in mean square sense. The proposed non-linear delay-free sensing and transmission strategy is compared with the well-known amplify-and-forward strategy, using the LQG control cost as a figure of merit. It is demonstrated that the proposed nonlinear scheme outperforms the best linear scheme even when there are only two sensors in the network. The proposed sensing and transmission scheme can be implemented with a reasonable complexity and it is shown to be robust to the uncertainties in the knowledge of the sensors about the statistics of the measurement noise and the channel noise.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2011. 19-23 p.
Keyword [en]
Decoding, Encoding, Noise measurement, Sensor systems, Signal to noise ratio
National Category
URN: urn:nbn:se:kth:diva-50629DOI: 10.1109/Swe-CTW.2011.6082481ScopusID: 2-s2.0-83755163550ISBN: 978-1-4577-1877-9OAI: diva2:462315
Copyright 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. QC 20120110Available from: 2012-01-10 Created: 2011-12-06 Last updated: 2012-03-22Bibliographically approved

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