On Field Measurements and Modelling of 2x2 Microwave LOS-MIMO Systems
Paper in proceeding, 2015

In this paper, we present channel measurements and preliminary analyses from three 2x2 microwave Lineof-Sight Multi-Input Multi-Output (LOS-MIMO) outdoor test links, operating on 8 GHz and 32 GHz. The main focus of the measurement campaign is to study channel conditions and the effects of rain and clear-air fading. First, we address the diverse performance measures used in the trials. In particular we introduce the MIMO phase difference as an additional channel metric to the received power. The MIMO phase difference is mainly determined by antenna positions, ground effects and atmospheric variations. The relation between antenna positions and channel conditions was addressed in a number of earlier works, while the atmospheric impact and the resulting link availability are rarely studied. Second, we present the preliminary results from the long-term measurement campaign. The longterm statistics of channel condition from the three links show stable performance. Analysis reveals that fluctuation of the phase difference and the channel condition number is likely due to abnormal atmospheric propagation which can be modelled using a two-ray reflection model. Meanwhile, rain attenuation is strongly correlated between MIMO sub-channels and its contribution to the long-term statistics of power loss is very close to the Single-Input Single-Output (SISO) case.

Author

Karl Rundstedt

Chalmers, Signals and Systems

Lei Bao

Rajet Krishnan

Chalmers, Signals and Systems, Communication, Antennas and Optical Networks

Bengt-Erik Olsson

Thomas Eriksson

Chalmers, Signals and Systems, Communication, Antennas and Optical Networks

Proceedings - IEEE Global Communications Conference, GLOBECOM

23340983 (ISSN) 25766813 (eISSN)


978-1-4799-5952-5 (ISBN)

Areas of Advance

Information and Communication Technology

Subject Categories

Telecommunications

DOI

10.1109/GLOCOM.2014.7417256

ISBN

978-1-4799-5952-5

More information

Latest update

4/4/2024 1