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Model-based power spectrum sensing from a few bits
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
2013 (English)In: 2013 Proceedings of the 21st European Signal Processing Conference (EUSIPCO), European Signal Processing Conference , 2013, 6811691- p.Conference paper (Refereed)
Abstract [en]

Wideband power spectrum sensing is fundamental for numerous applications. When side information on the potentially active emitters is available, such as carriers and spectral masks, it should be exploited to improve sensing performance. Here the power spectrum is modeled as a weighted sum of candidate spectral density primitives. The objective is to estimate the unknown weights from a few randomly filtered broadband power measurement bits, taken using a network of low-end sensors. A linear programming formulation that exploits the sparsity in the unknown weights is proposed. A better approach follows, which exploits the approximately Gaussian distribution of the errors in the power measurements prior to quantization, in a maximum likelihood formulation that includes a sparsity-inducing penalty term. Simulations show that the model weights can be accurately estimated from few bits, even when the errors are significant.

Place, publisher, year, edition, pages
European Signal Processing Conference , 2013. 6811691- p.
, European Signal Processing Conference, ISSN 2219-5491
Keyword [en]
Computer simulation, Errors, Linear programming, Signal processing, Spectral density, Linear programming formulation, Model weights, Penalty term, Sensing performance, Side information, Spectral masks, Spectrum sensing, Weighted Sum, Power spectrum
National Category
Signal Processing
URN: urn:nbn:se:kth:diva-150871ScopusID: 2-s2.0-84901358238ISBN: 978-099286260-2OAI: diva2:745775
2013 21st European Signal Processing Conference, EUSIPCO 2013, 9 September 2013 through 13 September 2013, Marrakech, Morocco

QC 20140911

Available from: 2014-09-11 Created: 2014-09-11 Last updated: 2014-09-11Bibliographically approved

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Tsakonas, Efthymios
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Signal ProcessingACCESS Linnaeus Centre
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ReferencesLink to record
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