Radar Rainbow Beams For Wideband mmWave Communication: Beam Training And Tracking

Zhou G, Garkisch M, Peng Z, Pan C, Schober R (2025)

Publication Language: English

Publication Type: Journal article

Publication year: 2025

Journal

IEEE Journal on Selected Areas in Communications Institute of Electrical and Electronics Engineers (IEEE)

Book Volume: 43

Pages Range: 1009-1026

Journal Issue: 4

DOI: 10.1109/JSAC.2025.3531538

Abstract

We propose a novel integrated sensing and communication (ISAC) scheme that leverages sensing to assist communication in light-of-sight (LoS) environments, ensuring fast initial access, seamless user tracking, and uninterrupted communication for millimeter wave (mmWave) wideband systems. True-time-delayers (TTDs) are utilized to generate frequency-dependent radar rainbow beams by controlling the beam squint effect. These beams cover users across the entire angular space simultaneously for fast beam training using just one orthogonal frequency-division multiplexing (OFDM) symbol. Three detection and estimation schemes are proposed based on radar rainbow beams for estimation of the users' directions, distances, and velocities, which are then exploited for communication beamformer design. The first proposed scheme utilizes a single-antenna radar receiver and one set of rainbow beams, but may cause a Doppler ambiguity. To tackle this limitation, two additional schemes are introduced, utilizing two sets of rainbow beams and a multi-antenna receiver, respectively. Furthermore, the proposed detection and estimation schemes are extended to realize user tracking by choosing different subsets of OFDM subcarriers. This approach eliminates the need to switch phase shifters and TTDs, which is typically required for existing tracking schemes. Simulation results reveal the effectiveness of the proposed rainbow beam-based training and tracking methods for mobile users.

Authors with CRIS profile

Gui Zhou Lehrstuhl für Digitale Übertragung (IDC) Moritz Garkisch Lehrstuhl für Digitale Übertragung (IDC) Robert Schober Lehrstuhl für Digitale Übertragung (IDC)

Involved external institutions

University of British Columbia CA Canada (CA) Southeast University / 东南大学 CN China (CN)

How to cite

APA:

Zhou, G., Garkisch, M., Peng, Z., Pan, C., & Schober, R. (2025). Radar Rainbow Beams For Wideband mmWave Communication: Beam Training And Tracking. IEEE Journal on Selected Areas in Communications, 43(4), 1009-1026. https://doi.org/10.1109/JSAC.2025.3531538

MLA:

Zhou, Gui, et al. "Radar Rainbow Beams For Wideband mmWave Communication: Beam Training And Tracking." IEEE Journal on Selected Areas in Communications 43.4 (2025): 1009-1026.

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