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本文提出一种功耗仅44μW的IoT反向散射标签，实现了1μs的同步精度和OFDMA并发通信，并支持软件定义调制。该设计解决了传统反向散射系统中多标签数据包冲突的问题。
2 Backscatter tags have proven advantageous in reducing the power consumption of ultralow upload data-rate IoT devices from milliwatts to tens of microwatts [1,2]. Previous backscatter ICs generally employ codeword translation and rely on the incident signal being a modulated wave compliant with 802.11b [1] or utilizing backscatter modulation of the incident single tone to generate a signal that adheres to established standards [2]. However, packet collisions occur in conventional backscatter IC systems with multiple tags in the following scenarios: 1) all tags synchronize with the incoming packet and concurrently backscatter their data in response to a modulated Wi-Fi or BLE signal; 2) the incident signal consists of an unmodulated single tone, and each tag individually
Jiaqi Shen*1, Fengyuan Zhu*2, Yang Liu1, Boxiao Liu1, Chunqi Shi1,
Leilei Huang1, Long Xu1, Xiaohua Tian2, Runxi Zhang1 East China Normal University, Shanghai, China Shanghai Jiao Tong University, Shanghai, China *Equally Credited Authors (ECAs)