通信学报 ›› 2024, Vol. 45 ›› Issue (2): 240-253.doi: 10.11959/j.issn.1000-436x.2024009
• 学术通信 • 上一篇
刘影1, 胡梦圆1, 钱志鸿2
修回日期:
2023-12-05
出版日期:
2024-02-01
发布日期:
2024-02-01
作者简介:
刘影(1983- ),女,吉林大安人,博士,辽宁工程技术大学副教授,主要研究方向为物联网、室内定位、无线感知等基金资助:
Ying LIU1, Mengyuan HU1, Zhihong QIAN2
Revised:
2023-12-05
Online:
2024-02-01
Published:
2024-02-01
Supported by:
摘要:
不可预测环境变化使Wi-Fi信号存在较大的波动,很难对子载波中的静态分量和行为感知的动态分量进行量化,导致无法准确刻画出动态呼吸特征的波动形式。基于此,提出了一种基于子载波互信息的呼吸感知(SMIBP)系统。首先,提出了动态分量信息(DCI)的刻画形式,利用互信息理论提取子载波中代表呼吸的动态分量信息。然后,利用层次分析法组合各子载波以最大化呼吸信号的动态特征,得到重构的DCI感知基信号,最后联合小波变换和峰值检测法得到呼吸速率,揭示了代表人体呼吸动态分量的理论途径。仿真结果表明,所提系统能较好地刻画每个子载波中动态呼吸分量,且在不同场景下可显著提高Wi-Fi对于小尺度动作的感知精度与范围。
中图分类号:
刘影, 胡梦圆, 钱志鸿. 基于Wi-Fi子载波互信息的人体呼吸感知系统[J]. 通信学报, 2024, 45(2): 240-253.
Ying LIU, Mengyuan HU, Zhihong QIAN. Human breathing perception system based on Wi-Fi subcarrier mutual information[J]. Journal on Communications, 2024, 45(2): 240-253.
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