University of Oulu

M. Y. Javed, N. Tervo, M. E. Leinonen and A. Pärssinen, "Wideband Inter-beam Interference Cancellation for mmW/Sub-THz Phased Arrays With Squint," in IEEE Transactions on Vehicular Technology, doi: 10.1109/TVT.2023.3242133

Wideband inter-beam interference cancellation for mmW/Sub-THz phased arrays with squint

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Author: Javed, Muhammad Yasir1; Tervo, Nuutti1; Leinonen, Marko E.1;
Organizations: 1Centre for Wireless Communications - Radio Technologies, University of Oulu, FI-90014 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 5.7 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2023
Publish Date: 2023-03-30


As relative bandwidth increases, beam squint, i.e., frequency dependent directivity, limits the wideband performance of phase-shifter steered arrays. This effect is already notable in 5G systems operating at 28 GHz and above with 400/800 MHz bandwidths, especially if broadband cancellation is needed between multiple beams. The wideband squinting effect reduces the signal-to-interference-plus-noise-ratio of a multibeam system by changing the level and direction of the spatial null towards the interferer. This paper examines the effectiveness of the inter-beam interference (IBI) cancellation using crosscoupled signals for wideband arrays with visible squint effect. For a large relative bandwidth of the array, this paper presents a component carrier-based approach for interference cancellation between the beams of different users or data streams. Furthermore, as bandwidth and array size increase, the impact of squint increases, which is also examined for the cancellation of the IBI. Furthermore, an example scenario is simulated using standard 5GNR modulated waveforms.

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Series: IEEE transactions on vehicular technology
ISSN: 0018-9545
ISSN-E: 1939-9359
ISSN-L: 0018-9545
Issue: Online first
DOI: 10.1109/tvt.2023.3242133
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work was supported in part by Nokia Corporation Ltd., in part by the RF Sampo project (3071/31/2021), in part by the Academy of Finland 6Genesis Flagship under Grant 318927, and in part by the Business Finland Project 5GForce.
Academy of Finland Grant Number: 318927
Detailed Information: 318927 (Academy of Finland Funding decision)
Copyright information: © The Author(s) 2023. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see