ORNet: OFDMA-Enabled mmWave Radar ISAC Networks
Authors: Zeming Yang, Linling Zhong, Wenhui Li, Yibin Deng, Jiazhen Lei, Fengyuan Zhu, Bingbing Wang, Haiming Jin, Xiaohua Tian
Abstract
Millimeter-wave (mmWave) radar backscatter communication (RBC) is an emerging Integrated Sensing and Communication (ISAC) paradigm that combines high-resolution sensing with low-power connectivity. However, existing systems rely on frequency modulation or coarse frequency-division multiplexing, forcing each tag to occupy the full frequency modulated continuous wave (FMCW) bandwidth or sacrifice data rate for concurrency, which fundamentally limits scalability. This raises a key question: can radar-centric RBC systems support OFDMA-like multi-user access?