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Blekinge Institute of Technology, School of Engineering.
Blekinge Institute of Technology, School of Engineering.
2011 (English)Independent thesis Advanced level (degree of Master (Two Years))Student thesisAlternative title
Samexistens mellan WLAN och WWAN i en anteckningsbok (Swedish)
Abstract [en]

A modern notebook can be equipped with several devices of wireless network access technologies, such as Wireless Local Area Network (WLAN), Wireles Wide Area Network (WWAN), Wireless Personal Area Network (WPAN), and radio based navigation systems, such as GNSS (Global Navigation Satellite System). Future mobile devices will have different radio technologies such as Long Term Evolution (LTE), Wideband Code Division Multiple Access (WCDMA) and WLAN transceivers co-existing on the same module that enables such a device to connect to the different radio technologies. With these radio technologies present in the same device, care must be taken to minimize the interference between them. In this master thesis, we analyze the co-existence of WLAN in the 2.4GHz ISM band, GSM 1800MHz/900MHz, and WCDMA FDD in the 800MHz and 2.1GHz band when they are embedded in a notebook. Different coexistence scenarios have been considered during this work, with focus on realistic power levels for the victim system as well as the aggressor system, and the actual antenna coupling measured for different notebooks. These measurements and the realistic power levels computed are results that will be a factor to consider when designing WLAN/WWAN coexistence module. This work is divided into seven major parts. Chapter 1 is an introduction to coexistence, and a description of the different radio access technologies considered. Chapter 2 is the state of the art. This is a brief discussion of previous related work on coexistence. v “ThesisReport” — 2011/6/22 — 13:43 — page vi — #6 Chapter 3 is the problem statement definition describing the research problems and hypothesis. Chapter 4 describes the measurement plan, devices and parameters considered in developing the test environment and the different measurement scenarios. Chapter 5 presents the measurement setup and procedures undertaken in achieving the measurement. Chapter 6 is the result analysis. Chapter 7 presents conclusion and future work.

Abstract [sv]

En modern bärbar dator kan utrustas med flera enheter för trådlös nätverksåtkomst teknik, såsom Wireless Local Area Network (WLAN), Trådlöst Wide Area Network (WWAN), Wireless Personal Area Network (WPAN) och radiobaserade navigationssystem, till exempel GNSS (Global Navigation Satellite System). Framtida mobila enheter kommer har olika radiotekniker som Long Term Evolution (LTE), Wideband Code Division Multiple Access (WCDMA) och WLAN transceivers samexisterande på samma modul som möjliggör en sådan anordning att ansluta till olika radiotekniker. Med dessa radioteknik som finns i samma enhet, man måste vidtas för att minimera störningarna mellan dem. I detta mästare Avhandlingen analyserar vi samexistensen av WLAN i 2,4 GHz ISM band, GSM 1800MHz/900MHz och WCDMA FDD i 800MHz och 2,1 GHz-bandet när de är inbäddade i en anteckningsbok. Olika samexistens scenarier har övervägas under detta arbete, med fokus på realistiska effektnivåer för offret systemet samt angriparen systemet, och det faktiska antennanslutning mäts för olika bärbara datorer. Dessa mätningar och realistiska makten beräknade nivåer resultat som kommer att vara en faktor att beakta när man utformar WLAN / WWAN samexistens modul.

Place, publisher, year, edition, pages
2011. , 87 p.
Keyword [en]
National Category
Computer Science Telecommunications Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:bth-3702Local ID: diva2:831013
Emmanuel O. Owolabi: +46 73 72 484 53, +234 805 618 2123. Vivien I. Ibiyemi: +46 73 65 943 76.Available from: 2015-04-22 Created: 2011-09-08 Last updated: 2015-06-30Bibliographically approved

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