Capacity of multiple-input multiple-output wireless communication systems operating in the HF band.
Date
2010
Authors
Brine, Nigel Leonard
Editors
Advisors
Lim, Cheng-Chew
Journal Title
Journal ISSN
Volume Title
Type:
Thesis
Citation
Statement of Responsibility
Conference Name
Abstract
Spatial multiplexing is a wireless communication technique that employs MIMO (multiple-input multiple-output) antenna arrays and spatial signal processing to effectively establish multiple parallel spatial data pipes within the same frequency band. The number of parallel spatial data pipes that can be supported is dependent on a number of factors, one of the most significant of these being multipath richness. In general, a channel that is rich in multipath will be capable of supporting a large number of parallel spatial data pipes, leading to high capacities.
The HF (high frequency) band is subject to significant multipath caused by multiple refractions and reflections between the ionospheric layers and the earth’s surface, making it a possible candidate for MIMO techniques. In this thesis, the capacity offered by spatial multiplexing in the HF band is investigated. To the best of our knowledge, no such investigation has previously been conducted. The approach taken involves collection of multi-channel HF sounder data from which antenna and propagating mode correlation measurements are made. The antenna and mode correlation measurements are used to generate stochastic channel matrices, from which estimates of MIMO capacity can be calculated.
The key contributions presented include estimation of HF MIMO capacity from ionograms, development of a multi-channel receiver for HF radio research, development of a model for the HF MIMO channel matrix, and development and application of a technique for estimating HF MIMO capacity from multi-channel receiver data. The results obtained from the investigation indicate that spatial multiplexing offers a significant increase in capacity compared with single channel communication technqiues, and should therefore be seriously considered for future HF radio systems. A major application that stands to benefit from HF MIMO technology is ship based communications.
School/Discipline
School of Electrical and Electronic Engineering
Dissertation Note
Thesis (Ph.D.) -- University of Adelaide, School of Electrical and Electronic Engineering, 2010