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On the Performance of Spatially Correlated Large Antenna Arrays for Millimeter-Wave Frequencies

Neil, CT; Garcia-Rodriguez, A; Smith, PJ; Dmochowski, PA; Masouros, C; Shafi, M; (2017) On the Performance of Spatially Correlated Large Antenna Arrays for Millimeter-Wave Frequencies. IEEE Transactions on Antennas and Propagation 10.1109/TAP.2017.2759842. (In press).

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Abstract

IEEE A spatially correlated large antenna array operating at millimeter-wave (mmWave) frequencies is considered. Based on a Saleh-Valenzuela channel model, closed-form expressions of the three-dimensional spatial correlation (SC) for wide, narrow and Von Mises power elevation spectra (PES) are analytically derived. The effects of the PES on the convergence to massive multipleinput- multiple-output (MIMO) properties is then illustrated by defining and deriving a diagonal dominance metric. Numerically, the effects of antenna element mutual coupling (MC) is shown on the effective SC, eigenvalue structure and mmWave user rate for different antenna topologies. It is concluded that although MC can significantly reduce SC for side-by-side dipole antenna elements, the change in antenna effective gain (and therefore signal-to-noise ratio) caused by MC becomes a dominating effect and ultimately determines the antenna array performance. The user rate of a mmWave system with hybrid beamforming (HBF), using an orthogonal matching pursuit (OMP) algorithm, is then shown for different antenna topologies with dipole and crosspolarized (x-pol) antenna elements. It is seen that even for small numbers of radio-frequency chains, the OMP algorithm works well relative to the fully digital case for channels with high SC, such as the x-pol antenna array.

Type: Article
Title: On the Performance of Spatially Correlated Large Antenna Arrays for Millimeter-Wave Frequencies
DOI: 10.1109/TAP.2017.2759842
Publisher version: https://doi.org/10.1109/TAP.2017.2759842
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Antenna arrays, Dipole antennas, Channel models, Topology, MIMO, Three-dimensional displays
UCL classification: UCL > School of BEAMS
UCL > School of BEAMS > Faculty of Engineering Science
URI: http://discovery.ucl.ac.uk/id/eprint/10039250
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