A 28µW IoT Tag That Can Communicate with Commodity WiFi Transceivers via a Single-Side-Band QPSK Backscatter Communication Technique

📋 论文概要

该论文提出了一种功耗仅28µW的IoT标签，通过单边带QPSK反向散射通信方式，能够与商用WiFi收发器进行通信，解决了传统WiFi设备功耗高、需要大电池或频繁充电的问题。

💡 主要创新点

• 实现28µW超低功耗的IoT标签，大幅降低无线通信能耗。
• 采用单边带QPSK反向散射技术，使标签能与现有商用WiFi收发器兼容通信，无需专用基础设施。

🏷 关键词

📄 原文摘要

San Diego, CA 1 2 Nearly all IoT devices require wireless connectivity, and to keep costs down and deployment opportunities up, communication should ideally occur with widely deployed commodity hardware such as WiFi. However, conventional WiFi transceivers (TRXs) require 10s to 100s of mW of active power. As a result, nearly all current WiFi-compatible IoT devices require either wall power, or large/frequently re-charged batteries (Fig. 20.1.1, left). While other standards such as BLE may require less power, very low power (<<1mW) is only achievable at very low throughputs via duty-cycling; and yet, despite low average power, very small coin cell batteries or energy harvesters cannot be used due to still relatively high peak-power requirements (e.g., a few mW for BLE), thereby limiting new products to certain minimum device sizes. More importantly, standards such as

👥 作者与机构

Po-Han Peter Wang1,2, Chi Zhang1, Hongsen Yang1, Dinesh Bharadia1, Patrick P. Mercier1

University of California, San Diego, La Jolla, CA Broadcom Inc