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Vector Measurements for Wireless Network Devices
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0001-8460-6509
2013 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Wireless networks are an iconic technology of today’s modern era, theyare present in our daily activities as can be exemplified by cellular communications,wi-fi, bluetooth, and others. Vector measurements play an importantrole in the design, simulation, and testing of wireless networks and are usedto characterize key devices operating in the radio interface, such as amplifiers,filters, and mixers.Accurate characterization is the key for improving the capacity and efficiencyof wireless networks. As the demand for network capacity continuouslyincreases, the accuracy of vector measurements must also improve. Further,it is anticipated that such trends will continue in the years to come. Consequently,the wireless industry needs to include nonlinear behavior in theircharacterization and analysis, to assess and guaranty the operation of the devices,and to comply to the specifications from governmental regulations. Incontrast to linear behavior, nonlinear behavior presents an additional bandwidthrequirement because the signal bandwidth grows when it passes throughnonlinear devices. In this thesis, vector measurements for devices operatingin wireless networks are studied, emphasizing a synthetic approach for theinstrumentation. This approach enables the use of digital post-processing algorithms,which enhances the measurement accuracy and/or speed and canovercome hardware impairments. This thesis presents the design of a vectorialmeasurement system for wireless devices considering the aforementionedtrends and requirements. It also explores the advantages of the proposedapproach, describes its limitations, and discusses the digital signal processingalgorithms used to reach its final functionality. Finally, measurement resultsof the proposed setup are presented, analyzed and compared to those of modernindustrial instruments.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2013. , 45 p.
Series
Trita-EE, ISSN 1653-5146 ; 2013:004
Keyword [en]
Vector measurements, radio frequency, synthetic instrumentation, bandwidth extension
National Category
Telecommunications
Research subject
Järnvägsgruppen - Elsystem
Identifiers
URN: urn:nbn:se:kth:diva-111863ISBN: 978-91-7501-630-6 (print)OAI: oai:DiVA.org:kth-111863DiVA: diva2:602637
Presentation
2013-02-22, hörsal 99131, Kungsbäcksvägen 47, Gävle, Gävle, 13:00 (English)
Opponent
Supervisors
Note

QC 20130204

Available from: 2013-02-04 Created: 2013-01-14 Last updated: 2013-02-04Bibliographically approved
List of papers
1. An Envelope Domain Measurement Test Setup to Acquire Linear Scattering Parameters
Open this publication in new window or tab >>An Envelope Domain Measurement Test Setup to Acquire Linear Scattering Parameters
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2008 (English)In: 72ND ARFTG MICROWAVE MEASUREMENT SYMPOSIUM, 2008, 54-57 p.Conference paper, Published paper (Refereed)
Abstract [en]

In this paper, the functionality of a vector network analyzer VNA is implemented using the concept of software defined measurements (SDM) [1], called SDM-VNA. A general measurement set-up based on a vector signal generator (VSG) and a vector signal analyzer (VSA) is used. The set-up allows complete linear characterization using only one receiver. A calibration procedure to remove the systematic errors is applied to the results and compared with a modern VNA, showing good agreement.

National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-45200 (URN)10.1109/ARFTG.2008.4804287 (DOI)000270442000009 ()
Conference
72nd ARFTG Microwave Measurement Conference. Portland, OR. DEC 09-12, 2008
Note
QC 20111109Available from: 2011-10-27 Created: 2011-10-27 Last updated: 2013-02-04Bibliographically approved
2. Nonlinear Network Analysis for Modern Communication Devices and Systems
Open this publication in new window or tab >>Nonlinear Network Analysis for Modern Communication Devices and Systems
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2008 (English)In: 72ND ARFTG MICROWAVE MEASUREMENT SYMPOSIUM, IEEE , 2008, 64-68 p.Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents a novel test setup, based on a vector signal generator (VSG) and a vector signal analyzer (VSA), capable of nonlinear characterization of communications devices such as RF power amplifiers. Envelope time-domain waveform extraction and correction is applied to the DUT reference plane, preserving vector correction even in modulated environments where ingoing and outgoing signals from the ports of the DUT can be distinguished. This tool is valuable in the analysis of nonlinear devices, the generation of behavioral models and the study of memory effects..

Place, publisher, year, edition, pages
IEEE, 2008
National Category
Engineering and Technology Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-45201 (URN)10.1109/ARFTG.2008.4804292 (DOI)000270442000011 ()
Conference
72nd ARFTG Microwave Measurement Conference. Portland, OR. DEC 09-12, 2008
Note
QC 20111109Available from: 2011-10-27 Created: 2011-10-27 Last updated: 2013-02-04Bibliographically approved
3. A Synthetic Vector Network Analyzing Measurement System
Open this publication in new window or tab >>A Synthetic Vector Network Analyzing Measurement System
2011 (English)In: IEEE Transactions on Instrumentation and Measurement, ISSN 0018-9456, E-ISSN 1557-9662, Vol. 60, no 6, 2154-2161 p.Article in journal (Refereed) Published
Abstract [en]

In this paper a synthetic vector network analyzing measurement system is presented. The system is based on a hardware set-up, including a signal generator and a vector signal analyzer, with the vector network analyzing functionality implemented in the software. The measurements of the proposed system demonstrated comparable performance in terms of accuracy and speed compared with a modern traditional vector network analyzer, but it is more flexible due to its inherent software implementation. The proposed system’s ability to measure nonlinear phenomena is addressed and discussed, and some preliminary results are given.

National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-45199 (URN)10.1109/TIM.2011.2113132 (DOI)000290538700025 ()2-s2.0-79955971576 (Scopus ID)
Note

QC 20130204

Available from: 2011-10-27 Created: 2011-10-27 Last updated: 2017-12-08Bibliographically approved
4. A Bandwidth Extension forTechnique Radio Frequency Measurements Using Pilot Tones
Open this publication in new window or tab >>A Bandwidth Extension forTechnique Radio Frequency Measurements Using Pilot Tones
(English)Article in journal (Other academic) Submitted
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-117724 (URN)
Note

QS 2013

Available from: 2013-02-04 Created: 2013-02-04 Last updated: 2013-02-04Bibliographically approved

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Zenteno, Efrain

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