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A synchronization technique to model output behavior of wide bandwidth signals
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0001-8460-6509
University of Gävle, Department of Building, Energy and Environmental Engineering .
2011 (English)Conference paper (Refereed)
Abstract [en]

Within the framework of system identification, the input / output measured sequences have to be synchronized in order to obtain a good model performance; the impact of the synchronization becomes larger under two conditions, firstly when measurements of the input and output data are in different time instants; secondly when the bandwidth of the measured signals is close to the Nyquist bandwidth of the measuring instrument, as in current trends where systems are pushed towards large bandwidth usage, as in multicarrier operation.


This paper proposes a combined approach in order to introduce the synchronization problem into the model identification procedure, where the overall goal is to produce a device/system model that performs better minimizing the error criterion.  

This approach is verified with measurements over a radio frequency power amplifier, In Fig 1. the normalized mean square error (NMSE) is plotted against the synchronization delay (∆), for data that was already synchronized (using a state of art technique with sub-sampling search [1]), as can be understood if this method it is the best then there should not be any other minima expect ∆=0, however an improvement (in NMSE) is found.

Place, publisher, year, edition, pages
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:kth:diva-90970OAI: diva2:507609
Third Biennial Conference on Advanced RF Measurement Technologies (RFMTC11). Gävle, Sweden. October 4-5 2011

QC 20120329

Available from: 2012-03-05 Created: 2012-03-05 Last updated: 2016-04-27Bibliographically approved

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