PHY Authentication for Ambient IoTs in Near-Field XL-MIMO Backscatter Communication Systems
IEEE Wireless Communications Letters, cilt.15, ss.4553-4557, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 15
- Basım Tarihi: 2026
- Doi Numarası: 10.1109/lwc.2026.3716876
- Dergi Adı: IEEE Wireless Communications Letters
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Compendex, INSPEC, Technology Collection (ProQuest)
- Sayfa Sayıları: ss.4553-4557
- Anahtar Kelimeler: Ambient IoT, backscatter communication, near-field, power-delay-profile, XL-MIMO
- İstanbul Medipol Üniversitesi Adresli: Evet
Özet
This letter leverages near-field (NF) spherical wavefronts to derive geometry-tied physical signatures for backscatter device (BD) authentication in extra-large multiple-input multiple-output (XL-MIMO) based backscatter communication (BC) systems. Specifically, we propose a binary element-wise delay shift keying (EW-DSK) BD modulation scheme exploiting multi-antenna BD design. In the proposed scheme, a deterministic BD-induced delay introduces bit-dependent shifts in the power-delay-profile (PDP) while preserving the aperturedependent NF curvature. Based on the extracted dominant perantenna PDP curvature, a compact delay-curvature signature extractor and an authentication test are developed to mitigate impersonation attacks. Simulation results demonstrate the proposed scheme’s performance in terms of the curvature-extraction capability, authentication accuracy and spoofing success probability (SSP) under varying spoofer distances, signal-to-noise ratios (SNRs), and effective bandwidths.