University of Oulu

W. Fan, P. Kyösti, L. Hentilä and G. F. Pedersen, "MIMO Terminal Performance Evaluation With a Novel Wireless Cable Method," in IEEE Transactions on Antennas and Propagation, vol. 65, no. 9, pp. 4803-4814, Sept. 2017. doi: 10.1109/TAP.2017.2723260

MIMO terminal performance evaluation with a novel wireless cable method

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Author: Fan, Wei1; Kyösti, Pekka2; Hentilä, Lassi2;
Organizations: 1Department of Electronic Systems, Faculty of Engineering and Science, Antennas, Propagation and Radio Networking Section, Aalborg University, 9220 Aalborg, Denmark
2Keysight Technologies Finland Oy, 90590 Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 3.5 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2017
Publish Date: 2018-08-06


Conventional conductive method, where antennas on the device under test (DUT) are disconnected from antenna ports and replaced with radio frequency (RF) coaxial cables, has been dominantly utilized in industry to evaluate multiple-input multiple-output capable terminals. However, direct RF cable connection introduces many practical problems and a radiated method to replace cable connection is highly desirable. Existing wireless cable method relies on the knowledge of a transfer matrix between the channel emulator (CE) output ports and DUT antenna ports, and also requires an anechoic chamber, which might be impractical and expensive. In this paper, a novel wireless cable method is proposed and experimentally validated. By recording the average power (i.e., reference signal received power in the long-term evolution) per DUT antenna port and selecting optimal complex weights at the CE output ports, a wireless cable connection can be achieved. The proposed method can be executed in a small RF shielded anechoic box and offers low system cost, high measurement reliability, and repeatability.

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Series: IEEE transactions on antennas and propagation
ISSN: 0018-926X
ISSN-E: 1558-2221
ISSN-L: 0018-926X
Volume: 65
Issue: 9
Pages: 4803 - 4814
DOI: 10.1109/TAP.2017.2723260
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work was supported by the Innovation Fund Denmark via the VIRTUalized envirOnment for Communication System Development and Optimization Project. The work of W. Fan was supported by the Danish Council for Independent Research under Grant DFF611100525.
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