Ytelse for multippel antenne teknikker i LTE
MasteroppgaveStudent thesisAlternative title
Performance for multiple antenna techniques in LTE (English)
This thesis is about doing test runs at an LTE base station at Telenor at Fornebu. The tests are
performed to find out how good the systems work, and specifically for this thesis to explore
the possibilities of spectral bandwidth gain exploiting multiple antenna and spatial multiplexing.
All tests were done by vehicle at Oksenøya outside Oslo. The tests were done at approximately
between 20 and 40 kph. The main tests resulted in 16 test-files with combinations of
4 different physical antenna configurations and 4 different transmission modes, driving the
route in both directions. Since Telenor's equipment at the moment only supports 2x2 MIMO, there
was no testing of higher channel ranks than 2. The antenna configurations was combinations
of co-polarity and cross-polarity and co-located and distance separated antennas.
The interesting aspect of this thesis is to fin if it is possible to use co-located antennas
only for 2x2 MIMO, 4x2 MIMO and 4x4 MIMO, which may result in large outcome savings when deploying
LTE for commercial use. It was not expected to perform as good as a distance separated antenna configuration.
The results was not concluding, but gave an indication to that the MIMO performance will suffer
dramatically from this setup, and leaves the question of what will be the best solution. This is a
question that will have to be answered by more test results.
Place, publisher, year, edition, pages
Institutt for elektronikk og telekommunikasjon , 2011. , 97 p.
ntnudaim:5868, MTEL elektronikk, Radioteknikk og kommunikasjon
IdentifiersURN: urn:nbn:no:ntnu:diva-14812Local ID: ntnudaim:5868OAI: oai:DiVA.org:ntnu-14812DiVA: diva2:464134
Ekman, Torbjørn, FørsteamanuensisLehne, Per-Hjalmar