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Evaluating the use of PXI modules in tests of a radio base station
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS, Radio Systems Laboratory (RS Lab). (CCS)
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis project was carried out at the electromagnetic compatibility (EMC) department at Ericsson AB. One of the department’s goals is to seek a possible replacement to the box test instruments by utilizing PCI extension for instrumentation (PXI) modules. The main objective of this project is to evaluate how different PXI modules work during testing of a radio base station (RBS), in terms of performance, test time, and cost. A downlink decoder was implemented in LabVIEW with an extension called MathScript and several software test solutions were examined to measure error vector magnitude (EVM), frequency error, and power, and to perform parallel measurements in a multiple radio access technology (multi-RAT) test configuration. Moreover, several uplink tests were performed to decide if PXI modules are a suitable substitute for the previous box based test instruments. The findings from this study show that PXI modules can replace the previous box based test instruments. However it was concluded that not all areas can be covered and not all discrete test instrument can (yet) be replaced. Future work should complete the downlink decoder implementation in the field programmable gate array (FPGA) level in order to further improve the performance further. Future work should also examine if it is possible to replace all of the discrete test instruments with PXI modules.

Abstract [sv]

Detta examensarbete utfördes på elektromagnetisk kompatibilitet (EMC) avdelningen på Ericsson AB. Ett utav avdelningens mål är att hitta en möjlig ersättare till de tidigare boxbaserade testinstrumenten genom PCI extension for instrumentation (PXI) moduler. Huvudmålet i detta projekt är att utvärdera hur olika PXI-moduler fungerar i basstationstester med hänsyn till prestanda, testtid och kostnad. En avkodare i nerlänk har implementerats i LabVIEW med hjälp av MathScript och flera mjukvarutestlösningar har undersökts för att mäta error vector magnitude (EVM), frekvensfel och effekt, samt att utföra parallella mätningar i en multipel radioteknik (multi-RAT) testkonfiguration. Dessutom har flera upplänkstester utförts för att avgöra om PXI-moduler är en lämplig ersättare till de tidigare boxbaserade testinstrumenten. Resultaten från denna studie visar att PXI-moduler kan ersätta tidigare boxbaserade testinstrumenten, men dessa resultat visar även att inte alla områden kan täckas och inte alla diskreta testinstrument kan ersättas (ännu). Framtida arbete ska slutföra implementationen av avkodare i nerlänk i fältprogrammerbar grindmatris (FPGA)-nivå för att förbättra prestandan ytterligare. Framtida arbete bör även undersöka om det är möjligt att ersätta alla diskreta testinstrument med PXI-moduler.

Place, publisher, year, edition, pages
2014. , xiv,45 p.
Series
TRITA-ICT-EX, 2014:26
Keyword [en]
Vector signal transceiver (VST), multiple radio access technology (multi-RAT), PCI extension for instrumentation (PXI), LabVIEW, testing
Keyword [sv]
Vektorsignal transceiver (VST), multipel radioteknik (multi-RAT), PCI extension for instrumentation (PXI), LabVIEW, testning
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:kth:diva-143810OAI: oai:DiVA.org:kth-143810DiVA: diva2:708945
Presentation
2014-03-28, Seminar room Grimeton, Isafjordsgatan 22, Kista, 13:00 (English)
Supervisors
Examiners
Available from: 2014-03-31 Created: 2014-03-31 Last updated: 2014-03-31Bibliographically approved

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Wang, Willy
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