Analog Assisted OFDM Receiver with Ultra-Low-Rate ADCs for ISAC Systems
IEEE Wireless Communications Letters, cilt.15, ss.1856-1860, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 15
- Basım Tarihi: 2026
- Doi Numarası: 10.1109/lwc.2026.3662445
- Dergi Adı: IEEE Wireless Communications Letters
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
- Sayfa Sayıları: ss.1856-1860
- Anahtar Kelimeler: ADC, analog preprocessing, analog receiver, comb pilots, ISAC, low sampling rate, OFDM
- İstanbul Medipol Üniversitesi Adresli: Evet
Özet
Integrated sensing and communication (ISAC) based on orthogonal frequency-division multiplexing (OFDM) offers improved spectral and system efficiency. Yet, wide-band OFDM systems that deliver high data rates and high sensing resolution typically rely on costly high-speed analog-to-digital converters (ADCs) and complex digital architectures. In this letter, we present a novel and OFDM-compatible transceiver that provides accurate sensing performance while substantially lowering sampling rate, computational complexity, cost, and energy consumption. The proposed design applies a lightweight phase-correction scheme to comb pilot arrangement to ensure phase continuity across all pilot tones in the OFDM symbols, thereby emulating a set of parallel continuous-wave radar signals. At the receiver, analog pre-processing extracts and processes these tones prior to digitization, which further alleviates both ADC and digital processing requirements. Simulation studies verify that the system maintains reliable sensing accuracy while achieving significant reductions in sampling rate and computational load compared to conventional OFDM-based ISAC implementations.