Godkända
Kanalmätning och analys för kommunikation med stora gruppantenner
Sohail Payami (2010)
Start
2012-01-16
Presentation
2012-06-28
Plats:
Avslutat:
2012-12-20
Examensrapport:
(Kontakta handledare)
Sammanfattning
Very large MIMO is a technique that potentially can offer large network capacities in multi-user scenarios where the users are equipped only with single antennas. In this thesis we are investigating channel properties for a realistic, though somewhat extreme, outdoor base station scenario using a large array. We present measurement results using a 128 element linear array base station and 26 different user position in line-of-sight (LOS) and 10 different user position in non line-of-sight (NLOS). We analyze the Ricean K-factor, received power levels over the array, antenna correlation and eigenvalue distributions. We show that the statistical properties of the received signal vary significantly over the large array. Near field effects and the non-stationarities over the array help decorrelating the channel for different users, thereby providing a favorable channel conditions with stable channels and low interference for the considered single antenna users.
Handledare: Fredrik Tufvesson (EIT)
Examinator: Ove Edfors (EIT)