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Blind linear equalization of PPM signals using third-order moments
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
2010 (English)In: IEEE Transactions on Wireless Communications, ISSN 1536-1276, E-ISSN 1558-2248, Vol. 9, no 4, p. 1298-1302Article in journal (Refereed) Published
Abstract [en]

A novel blind equalization strategy for pulse position modulation (PPM) based on maximizing the third-order moment of the equalizer output is presented. Compared to traditional fourth-order (e.g. kurtosis-based) methods, third-order moments give faster convergence and are less sensitive to noise. This work demonstrates that the intersymbol interference that plagues typical indoor ultra wideband (UWB) channels can be combatted using a third-moment maximizing blind equalizer which could therefore provide a cold start-up for a decision-directed scheme. Adaptation is shown to be asymptotically globally convergent with increasing time-hopped PPM frame length. Simulation experiments compare the performance to standard fourth-order schemes in practical settings, taking into account the conditions of time-hopping,multiple-access interference and a realistic UWB channel model.

Place, publisher, year, edition, pages
2010. Vol. 9, no 4, p. 1298-1302
National Category
Signal Processing
Research subject
Signal Processing
Identifiers
URN: urn:nbn:se:ltu:diva-10594DOI: 10.1109/TWC.2010.04.091025ISI: 000276817400010Scopus ID: 2-s2.0-77951284405Local ID: 96ac6300-5424-11df-a0f4-000ea68e967bOAI: oai:DiVA.org:ltu-10594DiVA, id: diva2:983539
Note
Validerad; 2010; 20100430 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Pääjärvi, PatrikLeblanc, James

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