Passive Wi-Fi Scattering Communication Method Based on MCU

TANG Xiao-qing; XIE Gui-hui; SHE Ya-jun; YU Yang

doi:10.3969/j.issn.0372-2112.2019.10.007

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Passive Wi-Fi Scattering Communication Method Based on MCU

更新时间：2025-07-16

- Passive Wi-Fi Scattering Communication Method Based on MCU
- Acta Electronica Sinica Vol. 47, Issue 10, Pages: 2069-2075(2019)
- 作者机构：
  
  1. 武汉第二船舶设计研究所,湖北,武汉,430205
  2. 中国地质大学(武汉)自动化学院,湖北,武汉,430074
  3. 武汉第二船舶设计研究所,湖北,武汉,430205
  4. 中国地质大学(武汉)自动化学院,湖北,武汉,430074
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0372-2112.2019.10.007
  CLC： TN92
- Published Online：25 October 2019，
  
  Published：2019
- 稿件说明：
移动端阅览
TANG Xiao-qing, XIE Gui-hui, SHE Ya-jun, et al. Passive Wi-Fi Scattering Communication Method Based on MCU[J]. Acta Electronica Sinica, 2019, 47(10): 2069-2075.
DOI：

TANG Xiao-qing, XIE Gui-hui, SHE Ya-jun, et al. Passive Wi-Fi Scattering Communication Method Based on MCU[J]. Acta Electronica Sinica, 2019, 47(10): 2069-2075. DOI： 10.3969/j.issn.0372-2112.2019.10.007.

摘要

与有源Wi-Fi相比，Wi-Fi散射通信具有功耗低、成本低的优势.但目前大多数研究都存在现场可编程门阵列（FPGA）功耗大和专用集成电路（IC）制作成本高的问题.为此该文提出一种基于微控制器（MCU）的无源Wi-Fi散射通信方法，用低主频MCU生成了纳秒级时序精度的Wi-Fi散射调制波形，并进行了低功耗设计和优化，开展了基于能量收集的MCU电源管理和无源系统设计，并首次展示了基于室内弱光能量收集的无源Wi-Fi原型样机.测试表明，通信瞬时功耗1.8mW，比有源器件降低了2~3个数量级.系统待机功耗2.5W，有效通信距离15m，兼容现有的商用Wi-Fi设备，且成本低，无需电池.

Abstract

Wi-Fi backscatter communication has lower power consumption and lower cost than active Wi-Fi. However

most of the current researches have the problems of large power consumption of field programmable gate array (FPGA) and high manufacturing cost of application specific integrated circuit (IC). Therefore

a passive Wi-Fi backscatter communication method based on microcontroller (MCU) is proposed. The low-frequency MCU is used to generate the Wi-Fi backscatter modulation waveform with nanosecond timing accuracy. After the low power design and optimization

the MCU power management based on energy harvesting and passive system design are carried out. And the passive Wi-Fi prototype is demonstrated for the first time. Tests show that the instantaneous power consumption of communication is 1.8mW

which is 2~3 orders of magnitude lower than that of active Wi-Fi. The system has a standby power consumption of 2.5μW and an effective communication distance of 15 meters. It is compatible with existing commercial Wi-Fi devices and has low cost and no battery.

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