dc.contributor |
Lempiänen, Jukka |
dc.contributor.author |
Bernardo Puente, Víctor |
dc.date |
2009-07 |
dc.identifier.uri |
http://hdl.handle.net/2099.1/7473 |
dc.language.iso |
eng |
dc.publisher |
Universitat Politècnica de Catalunya |
dc.rights |
Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.rights |
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject |
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Comunicacions mòbils |
dc.subject |
Wireless communication systems |
dc.subject |
Antennas (Electronics) |
dc.subject |
Universal Mobile Telecommunications System |
dc.subject |
Comunicació sense fil, Sistemes de |
dc.subject |
Antenes (Electrònica) |
dc.subject |
UMTS (Universal Mobile Telecommunications System) |
dc.title |
Implementation Aspects of UMTS 900 MHz/2100 MHz for High Altitude Platforms |
dc.type |
info:eu-repo/semantics/bachelorThesis |
dc.description.abstract |
Projecte realitzat en col.laboració amb el centre Tampere University of Technology |
dc.description.abstract |
High Altitude Platforms (HAPs) represent an alternative to terrestrial mobile telecommunications.
The aim of HAPs is to offer a feasible solution for the radio access
layer of this kind of networks. The strong point of HAPs resides in the fact that
they bring together the best features of terrestrial and satellite systems. HAPs
have been widely proposed for deploying telecommunication services such as third
generation mobile networks. In Europe, third generation of mobile communications
system is using UMTS. It has being widely deployed in the last years but still there
are certain areas where 3G coverage is not available. Especially in rural areas with
low population density, where the operators did not find a cost efficient way to
deploy UMTS services. As a result, UMTS in 900 MHz band emerges as a possible
way to improve UMTS coverage for these areas, and combining with a HAP-based
deployment, a cost efficient way for a widely deployment in sparsely populated and
remote areas for 3G services.
The work shown in this thesis is a comparison of network simulations obtained from
the use of HAPs in the radio access network of UMTS using 900 MHz band and
2100 MHz band. The study was aimed to find the impact of carrier frequency on
coverage for a single HAP scenario using different deployment strategies. An antenna
study has also been done in order to see the impact of antenna beamwidth on UMTS
system. The results obtained reveal that the decrease in the carrier frequency caused
a clear increase in the coverage, when correct distance between cells was selected.
Consequently the results obtained show the variation of the network performance
with the separation between cells using both carrier frequencies, 2100 MHz and 900
MHz. |