A Low-Complexity Codebook-Based Physical Layer Security Framework for Ambient IoT Systems
IEEE Wireless Communications Letters, cilt.15, ss.1235-1239, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 15
- Basım Tarihi: 2026
- Doi Numarası: 10.1109/lwc.2025.3650178
- Dergi Adı: IEEE Wireless Communications Letters
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
- Sayfa Sayıları: ss.1235-1239
- Anahtar Kelimeler: A-IoT, codebook, CSI, KDR, OOK, PLS
- İstanbul Medipol Üniversitesi Adresli: Evet
Özet
This letter introduces a novel physical-layer security (PLS) mechanism for ultra-low-power ambient IoT (A-IoT) devices. The proposed system leverages on-off keying (OOK) signaling in combination with randomly modulated transmitter-side phases to generate a secure, channel-dependent detection pattern. This modulation technique causes the energy detector output of the A-IoT receiver to be highly sensitive to the unique properties of the wireless channel. Through a training stage, the transmitter learns a one-to-one mapping between transmitted sequences and observed binary outcomes, forming a secure codebook without requiring channel state information (CSI). To handle sparse multipath, random pre-filtering further enlarges the security gap. Analytical derivations and simulations show strong agreement, demonstrating a clear key disagreement rate (KDR) gap between legitimate devices and eavesdroppers under both rich and sparse multipath channels.