Exploiting Beam-Squint for Fast Object Detection in Hybrid Beamforming ISAC Systems
2026 Joint European Conference on Networks and Communications and 6G Summit, EuCNC/6G Summit 2026, Malaga, İspanya, 2 - 05 Haziran 2026, ss.872-877, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Doi Numarası: 10.1109/eucnc/6gsummit68295.2026.11577268
- Basıldığı Şehir: Malaga
- Basıldığı Ülke: İspanya
- Sayfa Sayıları: ss.872-877
- Anahtar Kelimeler: beam-squint, fast beam sweeping, hybrid beamforming, ISAC, mmWave, range-angle estimation
- Hacettepe Üniversitesi Adresli: Evet
Özet
This paper investigates the beam-squint phenomenon in hybrid beamforming-based Integrated Sensing and Communication (ISAC) systems operating at millimeter-Wave (mmWave) frequencies. Instead of treating beam-squint as a performance degradation factor, it is exploited for sensing to accelerate beam scanning and enable computationally efficient range and angle estimation. An interleaved Orthogonal Frequency Division Multiplexing (OFDM) subcarrier allocation is adopted to jointly preserve range resolution and support simultaneous communication. The beam-squint induced frequency tapering effect, termed as the beam-squint window, is analytically formulated and exploited for coarse object localization. A twostep estimation method is proposed, consisting of range and angle profiling, which is a computationally efficient alternative to MMSE estimation. Simulation results demonstrate that the proposed method significantly reduces required beam number in beam sweeping while providing satisfactory estimation accuracy, making it a practical and cost-effective solution for 6 G and Beyond ISAC transceivers without additional True-Time Delay (TTD) hardware.