University of Oulu

P. Kyösti, "Correlation of Hybrid Beamforming Arrays in the Context of OTA Testing," in IEEE Antennas and Wireless Propagation Letters, vol. 19, no. 4, pp. 671-675, April 2020.

Correlation of hybrid beamforming arrays in the context of OTA testing

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Author: Kyösti, Pekka1,2
Organizations: 1Centre for Wireless Communications, University of Oulu, Finland
2Keysight Technologies Finland Oy
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.6 MB)
Persistent link:
Language: English
Published: Institute of Electrical and Electronics Engineers, 2020
Publish Date: 2020-03-25


Hybrid beamforming antenna arrays are a prominent component in communications at mm-wave frequencies. Multiple analogue beamforming arrays will be used for spatial multiplexing of signals also in hand held devices. In this work we derive the correlation coefficient for signals received by two ideal arrays in simple power angular distribution schemes. The purpose is to develop tools for evaluating over-the-air setups for testing of hybrid beamforming devices. We show a few exemplary correlation error evaluations that compare near field multi-probe OTA setups with a perfect target channel model. Results indicate that the correlation error increases with decreasing range length and channel angular spread. Moreover, larger inter-array spacing and sub-array sizes increase the correlation error.

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Series: IEEE antennas and wireless propagation letters
ISSN: 1536-1225
ISSN-E: 1548-5757
ISSN-L: 1536-1225
Volume: 19
Issue: 4
Pages: 671 - 675
DOI: 10.1109/LAWP.2020.2976515
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work has been partly done in 6G Flagship programme funded by Academy of Finland (grant no. 318927).
Academy of Finland Grant Number: 318927
Detailed Information: 318927 (Academy of Finland Funding decision)
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