A Blind Tap Combiner for Low-Power Wake-Up Receiver
IEEE Wireless Communications Letters, cilt.15, ss.5189-5193, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 15
- Basım Tarihi: 2026
- Doi Numarası: 10.1109/lwc.2026.3730958
- 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.5189-5193
- Anahtar Kelimeler: envelope detection, low-power wake-up radio, on-off keying, Wake-up signal detection
- İstanbul Medipol Üniversitesi Adresli: Evet
Özet
Low-power wake-up radio (LP-WuR) is a key technology for the sixth-generation (6G) Release 20 roadmap for enabling energy-efficient devices. However, its reliance on non-coherent envelope detection (ED) fundamentally limits detection reliability under multipath fading and low signal-to-noise ratio (SNR), restricting detection probability at the cell edge. This letter proposes a non-coherent rake receiver with blind phase compensation for On-Off keying (OOK)-based LP-WuR, operating without channel state information (CSI). The proposed receiver resolves effective channel taps at the LP-WuR filter bandwidth, detects reliable fingers via a constant false alarm rate (CFAR) threshold, and blindly compensates the per-tap phase through a quantized phasor bank, using a locally generated reference, before coherently combining the taps using equal gain combining (EGC). A closed-form bit error rate (BER) analysis confirms diversity order equal to the number of resolved fingers, yielding a diversity gain with a slight quantization loss. Simulation results validate the gain in BER while incurring a bounded, roughly twelvefold operation-count overhead over ED.