传感技术学报2025，Vol.38Issue(10)：1800-1809,10.DOI:10.3969/j.issn.1004-1699.2025.10.010
基于WiFi-CSI相位差的被动式室内人员检测方法
Passive Indoor Person Detection Method Based on WiFi-CSI Phase Difference
许新华 1吴振华1
作者信息
- 1. 南昌航空大学软件学院,江西 南昌 330063
- 折叠
摘要
Abstract
Indoor personnel detection technology is the premise and foundation of wireless sensing,and its application scenarios are very extensive.In order to effectively distinguish between indoor scenes with dynamic personnel and indoor scenes with static personnel,fine-grained CSI(channel state information)phase difference information is used as the base signal for wireless sensing.The phase difference information utilizes the synergistic effect of frequency diversity and spatial diversity,and contains more information of small motion.Due to the phase ambiguity and initial phase offset,the phase difference sequence has the problem of multi-channel independent time series.From the perspective of a single packet at a certain time of CSI phase data,according to the reason that phase ambiguity and initial phase offset lead to multi-channel time series,a phase difference correction algorithm is proposed to remove the influence of phase ambi-guity and initial phase offset and phase difference is used for personnel detection.In the passive indoor personnel detection,the average accuracy of dynamic personnel detection is about 98.85%,and the average accuracy of static personnel detection is about 95.99%.Be-cause the extracted features are physically reasonable and unrelated to the environment,the human motion speed feature and static hu-man respiratory feature have certain robustness to the environment and time dynamics.Experiments show that the phase difference cor-rection algorithm proposed can effectively correct the phase difference and remove the influence of phase ambiguity and initial phase off-set.Personnel detection based on phase difference can achieve high accuracy.关键词
信号处理/室内人员检测/相位差矫正/信道状态信息/相位差/相位模糊Key words
signal processing/indoor personnel detection/phase difference correction/channel state information/phase difference/phase ambiguity分类
计算机与自动化引用本文复制引用
许新华,吴振华..基于WiFi-CSI相位差的被动式室内人员检测方法[J].传感技术学报,2025,38(10):1800-1809,10.
