On stochastically emulating continuous scattering structures by discrete sources for OTA testing of DuT with highly directive antennas

Kotterman WA, Landmann MH, Del Galdo G (2016)

Publication Type: Conference contribution

Publication year: 2016

Publisher: Institute of Electrical and Electronics Engineers Inc.

Book Volume: 0

Conference Proceedings Title: IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

Event location: Valencia, ESP

ISBN: 9781509032549

DOI: 10.1109/PIMRC.2016.7794557

Abstract

Considered is OTA testing of future generation communications systems, especially of Devices-under-Test of large electrical size and with highly directive antenna patterns. The channel is assumed to be dominated by a single continuous cluster. Two methods of stochastic cluster emulation by discrete incident fields, modelled as plane waves, are investigated. With both methods, a potential problem with calibrating OTA set-ups was noticed. Random variations in received power of more than 15 dB were observed in cases of angular symmetry around the DuT heading. With omnidirectional antennas, these variations can be reduced to less than 0.1 dB by selecting the initial phases. On DuT antennas with different angular phase responses, this has limited effect, still up to 6 dB variations were seen. Only for the MPAC emulation method, introducing angular asymmetry in the array reduced random variations to smaller than 0.15 dB. Additional deterministic power variations, depending on the method either ripple or bias, were observed too. On the highly directive pattern of a car, the ripple could be stronger than 10 dB (peak-to-peak) for a 12-antenna OTA ring, the bias up to 5 dB. The more OTA antennas, the smaller these deterministic power variations. Recommendations for calibration of MPAC set-ups and designing OTA antenna arrays are given.

Involved external institutions

Technische Universität Ilmenau DE Germany (DE) Fraunhofer-Institut für Integrierte Schaltungen (IIS) DE Germany (DE)

How to cite

APA:

Kotterman, W.A., Landmann, M.H., & Del Galdo, G. (2016). On stochastically emulating continuous scattering structures by discrete sources for OTA testing of DuT with highly directive antennas. In IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC. Valencia, ESP: Institute of Electrical and Electronics Engineers Inc..

MLA:

Kotterman, Wim A.Th, Markus H. Landmann, and Giovanni Del Galdo. "On stochastically emulating continuous scattering structures by discrete sources for OTA testing of DuT with highly directive antennas." Proceedings of the 27th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2016, Valencia, ESP Institute of Electrical and Electronics Engineers Inc., 2016.

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