title: Analysis of millimetre-wave polarization diverse multiple-input multiple-output capacity.
abstract: Millimetre-waves offer the possibility of wide bandwidth and consequently high data rate for wireless communications. For both uni- and dual-polarized systems, signals sent over a link may suffer severe degradation due to antenna misalignment. Orientation robustness may be enhanced by the use of mutual orthogonality in three dimensions. Multiple-input multiple-output polarization diversity offers a way of improving signal reception without the limitations associated with spatial diversity. Scattering effects often assist propagation through multipath. However, high path loss at millimetre-wave frequencies may limit any reception enhancement through scattering. We show that the inclusion of a third orthogonal dipole provides orientation robustness in this setting, as well as in a rich scattering environment, by means of a Rician fading channel model covering all orientations for a millimetre-wave, tri-orthogonal, half-wave dipole transmitter and receiver employing polarization diversity. Our simulation extends the analysis into three dimensions, fully exploiting individual sub-channel paths. In both the presence and absence of multipath effects, capacity is observed to be higher than that of a dual-polarized system over the majority of a field of view.
authors.affiliation: School of Electrical and Electronic Engineering, The University of Adelaide South Australia 5005, Australia.
authors.forename: Nicholas P
authors.initials: NP
authors.lastname: Lawrence
authors.affiliation: School of Electrical and Electronic Engineering, The University of Adelaide South Australia 5005, Australia.
authors.forename: Brian W-H
authors.initials: BW
authors.lastname: Ng
authors.affiliation: RFT Group EWRD, DSTO PO Box 1500, Edinburgh, South Australia 5111, Australia.
authors.forename: Hedley J
authors.initials: HJ
authors.lastname: Hansen
authors.affiliation: School of Electrical and Electronic Engineering, The University of Adelaide South Australia 5005, Australia.
authors.forename: Derek
authors.identifier: 0000-0002-0945-2674
authors.initials: D
authors.lastname: Abbott
keywords: diversity; microwaves; polarization