An OFDMA Baseband Processor Enabling $165\mu \mathrm{W}$ Long-Range IoT Localization

作者：Andrea Bejarano-Carbó, Chien-Wei Tseng, Demba Komma, Pierre Abillama, Zichen Fan, Dennis Sylvester, Hun-Seok Kim, David Blaauw · 年份：2025 · DOI：10.23919/vlsitechnologyandcir65189.2025.11075164 · 被引用次数：1 · 研究领域：Wireless Body Area Networks

We present an OFDMA baseband localization processor fabricated in 22nm, co-designed with a low-power, crystal-less narrowband RF receiver chip that efficiently estimates the channel frequency response in real-time for localization. The localization processor consumes 1.52/2.04mW for 2/3D localization processing, and duty-cycles the RF receiver achieving 247nW standby power. The combined system achieves a localization distance of 430m, a 4.3× improvement over state-of-the-art, while maintaining comparable accuracy. We deploy this system in a$1\times 2.8$cm IoT localization tag with$165\mu \mathrm{W}$average power at 0.1 Hz location acquisition rate.