Experimental verification of degrees of freedom for co-located antennas in wireless channels
Author
Summary, in English
It has been postulated that six co-located orthogonally polarized electrical and magnetic dipoles can offer up to six degrees of freedom (DOFs) in a multipath scattering environment. In other words, a six-fold increase in channel capacity can be achieved in the context of MIMO systems. However, due to the complexity in designing and measuring such a six-port antenna, to our knowledge, no experimental verification has yet been successfully performed. In this paper, the six DOFs hypothesis is experimentally verified at 377MHz. The experiment involves the design and fabrication of two six-port arrays. In particular, one array is made compact with co-located antenna elements enclosed in a small cubic volume of (0.24*wavelength)^3. Using the two arrays, MIMO channel measurements are performed in a RF shielded laboratory in order to measure a multipath scattering environment. Analysis on eigenvalues of the measured channel shows that six DOFs are attained due to the orthogonality in radiation patterns of the two arrays.
Department/s
Publishing year
2012
Language
English
Pages
3416-3423
Publication/Series
IEEE Transactions on Antennas and Propagation
Volume
60
Issue
7
Full text
Document type
Journal article
Publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
Topic
- Electrical Engineering, Electronic Engineering, Information Engineering
Status
Published
Project
- Radiosystem: MIMO technology in compact multiband antenna systems (Vinnova/SonyEricsson, BKL)
- Radiosystem: Fundamental Limits of Compact MIMO Systems (VR, BKL)
Research group
- Communication Systems
- Radio Systems
- Electromagnetic theory
ISBN/ISSN/Other
- ISSN: 0018-926X