Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Middlesex University, School of Engineering and Information Sciences, Computer Communications , İngiltere
Tezin Onay Tarihi: 2013
Tezin Dili: İngilizce
Öğrenci: Ramazan Gokhan Donmez
Danışman: Enver Ever
Özet:
Design and deployment
of a wireless communication networks require being able to model the path loss
as realistic as possible. In this paper, several indoor empirical models to
estimate path loss studies were studied and the standard deviations introduced by
the models were compared, considering the complexity of indoor measurement
environment in terms of the layout of the objects. The empirical model which
assumes the path loss as the summation of free space loss and the individual
losses introduced by each partition of any kind of material lying on the direct
line between the transmitter and receiver, was critically decided to be the
prominent model. Regarding it as the theoretical model to
validate, experiments were conducted across several scenarios, by means of
programming CC2420 motes and taking measurements via TinyOS. Some solutions were developed to
overcome the inability of swept tuned spectrum analyser equipment to capture
transient type signals transmitted from the motes. In addition to attempts to validate the
theoretical model, TinyOS based experiments also consists of determination of practical
input antenna gain of the CC2420 motes as well as measurements of observer
effect, message issuing frequency effect, and path loss values of doors and walls
and some other objects in the environment.