AoA Estimation in Dual-Polarization Virtual Sub-Arrays for Analog Beam Refinement

Authors

  • Michel Gonzaga dos Santos Wireless Telecommunications Research Group (GTEL), Federal University of Ceará (UFC), Fortaleza, Brazil
  • Lászlon Rodrigues da Costa Wireless Telecommunications Research Group (GTEL), Federal University of Ceará, Fortaleza, Brazi
  • Igor Moaco Guerreiro Wireless Telecommunications Research Group (GTEL), Federal University of Cear´a, Fortaleza, Brazil
  • Fredrik Athley Ericsson AB, Ericsson Research, Sweden

DOI:

https://doi.org/10.14209/jcis.2025.10

Keywords:

Beam management, mmWave bands, Dual-polarization beamforming, AoA estimation

Abstract

This work proposes an angle of arrival (AoA) estimator for analog beam refinement in cellular systems operating in millimeter wave (mmWave) bands. Differently from previous works, the proposed method exploits the polarization domain and the concept of virtual arrays to estimate the AoA through a cross-correlation function. The proposed AoA estimator requires only a polarization-multiplexed measurement to estimate the AoA at the receiver. To cope with polarization leakage issues, this work proposes a channel equalization in the polarization domain conditioned on the estimation of the cross-channel gain. Simulation results indicate that the beam refinement procedure with the proposed AoA estimator has similar performance to the classical beam sweeping, but using less time-multiplexed measurements.

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Author Biographies

Michel Gonzaga dos Santos, Wireless Telecommunications Research Group (GTEL), Federal University of Ceará (UFC), Fortaleza, Brazil

Michel G. Santos received his B.S. degree in Telecommunications Engineering from the Federal University of Ceará (UFC), Brazil, in 2020, and his M.S. degree in Signal for Health, Telecommunications, Image and Multimedia, with an emphasis on Data Science, from Polytech Nice, Sophia Antipolis, France, in 2019. He is currently pursuing his Ph.D. in Teleinformatics Engineering at the Federal University of Ceará. From November 2023 to April 2024, he was a visiting doctoral student at Ericsson Research AB in Stockholm, Sweden. His research interests include performance bounds in integrated sensing and communication (ISAC), MIMO transceiver design, beam management, and signal processing for communications.

Lászlon Rodrigues da Costa, Wireless Telecommunications Research Group (GTEL), Federal University of Ceará, Fortaleza, Brazi

Lászlon R. Costa received the B.Sc. degree in Computer Engineering, the M.Sc. degree in Computer and Electrical Engineering, and the Ph.D. degree in Teleinformatics Engineering from the Federal University of Ceará (UFC), Brazil, in 2014, 2016, and 2020, respectively. In 2019, he was a visiting Ph.D. student at the Technical University of Darmstadt (TUD), Germany. From 2021 to 2022, he worked as a postdoctoral researcher at the Wireless Telecom Research Group (GTEL)/UFC, in technical collaboration with Ericsson Research, Sweden. He is currently a Project Manager at the Atlantico Institute. His research interests include MIMO transceiver design, convex and linear optimization for wireless communication systems, radio resource allocation, beam management, and signal processing for communications.

Igor Moaco Guerreiro, Wireless Telecommunications Research Group (GTEL), Federal University of Cear´a, Fortaleza, Brazil

Igor M. Guerreiro received the B.S., M.S. and Ph.D. degrees in Teleinformatics Engineering from the Federal University of Ceará (UFC), Brazil, in 2007, 2010 and 2016, respectively. He currently holds an Assistant Professor position at the UFC Department of Teleinformatics Engineering. Since 2007 he has been a researcher with a Wireless Telecommunications Research Group (GTEL), Brazil, working in research projects within a technical cooperation with Ericsson Research, Sweden. As a Ph.D. student, he was granted a one-year scholarship from the Swedish Institute of Technology (KTH) in 2014-15 in Stockholm, Sweden, for a year-long period abroad. In 2021 he was granted a three-month fellowship (level 2) from the National Council for Scientific and Technological Development (CNPq), Brazil. In 2022 he was awarded his postdoctoral degree in Teleinformatics Engineering at UFC with an emphasis on wireless communication systems and physical layer aspects for Internet of Things applications.

His research interests include wireless communication systems for massive machine-type communications and ultra-reliable low-latency communications applied to industrial automation scenarios as well as physical layer abstraction of cellular networks applied to system-level simulations.

Fredrik Athley, Ericsson AB, Ericsson Research, Sweden

Fredrik Athley received his M.Sc. degree in electrical engineering from Chalmers University of Technology, Göteborg, Sweden, and the International Diploma of Imperial College, London, UK in 1993. He received his Ph.D. in electrical engineering from Chalmers University of Technology in 2003.,From 1993 to 2005 he was working with radar system design at Ericsson Microwave Systems AB in Mölndal, Sweden. Since 2005 he is at Ericsson Research working with antenna systems for wireless communications.

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Published

2025-11-28

How to Cite

Gonzaga dos Santos, M., Rodrigues da Costa, L., Moaco Guerreiro, I., & Athley, F. (2025). AoA Estimation in Dual-Polarization Virtual Sub-Arrays for Analog Beam Refinement. Journal of Communication and Information Systems, 40(1), 92–96. https://doi.org/10.14209/jcis.2025.10

Issue

Vol. 40 No. 1 (2025)

Section

Letters

License

Copyright (c) 2025 Michel Gonzaga dos Santos, Lászlon Rodrigues da Costa, Igor Moaco Guerreiro, Fredrik Athley (Author)

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Received 2025-05-02
Accepted 2025-11-10
Published 2025-11-28