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Calibration procedure for 2-D MIMO over-the-air multi-probe test system

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5 Author(s)
Parveg, D. ; Sch. of Electr. Eng., Dept. of Radio Sci. & Eng., Aalto Univ., Aalto, Finland ; Laitinen, T. ; Khatun, A. ; Kolmonen, V.-M.
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Multi-probe based systems are an attractive alternative for MIMO over-the-air testing of mobile communication devices. Many studies have been conducted on synthesizing fields inside a test system assuming that each of the probes generates a plane wave arriving in the test zone from the direction of the probe. In most practical systems, this is however not the case due to the near-field effects and scattering contributions from the neighboring probes. This paper presents a calibration procedure to partially compensate those near-field and the scattering effects. This calibration procedure is based on two measurement steps and related data processing, which provide the required excitation coefficients for the probes for enabling the partial compensation of the near-field and scattering effects inside the test zone. The proposed calibration procedure is validated by computer calculations.

Published in:

Antennas and Propagation (EUCAP), 2012 6th European Conference on

Date of Conference:

26-30 March 2012

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