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Erklärung}

Hiermit erkläre ich, dass ich diese Abschlussarbeit selbständig verfasst
habe, keine anderen als die angegebenen Quellen/Hilfsmittel verwendet
habe und alle Stellen, die wörtlich oder sinngemäß aus veröffentlichten
Schriften entnommen wurden, als solche kenntlich gemacht habe. Darüber
hinaus erkläre ich, dass diese Abschlussarbeit nicht, auch nicht auszugsweise,
bereits für eine andere Prüfung angefertigt wurde.

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Ort, Datum \\(Place, Date)
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Unterschrift \\(Signature)
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Acknowledgment}

I would like to thank my supervisors Konrad Meier and Dennis Wehrle for their 
help and encouraging talks during the thesis. Beside the help from the supervisors I
would like to thank my family and friends who supported me through my master studies, and 
the entire Communication systems department for their support, free coffee and
to Prof. Dr. Gerhard Schneider for making all the required hardware available. I would like
to thank Prof. Dr. Christian Schindelhauer for writing the recommendation letter so that DAAD
could extend my scholarship and stay in Freiburg.
I would like to thank my friend Mirza Hamza from the Telecommunication department at the Faculty
of Electrical Engineering in Sarajevo for proofreading the AGPS chapter.
I would like to thank Sebastian Schmelzer for
his LaTeX tips, Michael Neves Pereira and Jonathan Bauer for borrowing me their cell
phones to test my localization system with as well as Johan Latocha for patiently explaining
me words I did not understand in the German language and for showing me Inkscape. 
I would like to thank Richard Zahoransky 
for the helping discussions about various GSM topics. Thank go to Holger Hans Peter Freyther 
as well, who gave me a hint where to modify OpenBSC to make an independent data channel interface
with a cell phone. Things which have not been done before
are intellectually seductive in some way and it kept me motivated and working during the tough
periods.
 
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