FMCW-Based Integrated Sensing and Communication System: Design, Implementation, and Experimental Measurements
IEEE Transactions on Communications, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1109/tcomm.2026.3706482
- Dergi Adı: IEEE Transactions on Communications
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Compendex, INSPEC, zbMATH, Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest)
- Anahtar Kelimeler: hardware implementation, Index modulation, integrated sensing and communications, phase codes, phase modulation, radar waveform
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
This study proposes a radar-centric integrated sensing and communication (ISAC) system that utilizes a two-layer modulation scheme for vehicular networks. Frequencymodulated continuous wave (FMCW) chirps are jointly modulated via phase modulation (PM) and index modulation (IM) to transmit data while maintaining sensing as the primary function. Moreover, a novel radar signal processing technique is developed to mitigate the impacts of IM and PM on sensing accuracy, alongside a communication receiver architecture designed to demodulate IM and PM data within FMCW chirps successfully. System performance is evaluated through simulations in the 2.4 GHz and 24 GHz bands under Doppler effects, achieving communication throughputs of 25 Mbps and 50 Mbps, respectively. Furthermore, a proof-of-concept hardware implementation is realized, and experimental measurements are performed via a loopback cable to verify the feasibility of the architecture. Finally, it evaluates the fundamental trade-off between communication throughput, sensing accuracy, and out-of-band emission, demonstrating the system’s flexibility to dynamically adjust waveform parameters to meet various operational requirements.