Human respiration tracking method, device and system based on multipath phase cancellation
A multi-path, human body technology, applied in the field of signal processing, can solve the problem that the CSI phase cannot be tracked by breathing, and achieve the effect of eliminating signal offset, improving efficiency and accuracy
Active Publication Date: 2021-10-01
合肥中科知奇信息科技有限公司
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These phase offset values vary randomly over time, making the measured CSI phase unusable for respiration tracking
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[0046] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0047] It should be understood, however, that these descriptions are exemplary only, and are not intended to limit the scope of the present disclosure. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. Also, in the following description, descriptions of well-known technologies are omitted in order to avoid unnecessarily obscuring the concept of the present disclosure.
[0048] The terminology used herein is for the purpose of describing particular embodiments only, a...
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The present disclosure provides a human respiration tracking method based on multipath phase cancellation, including constructing a first phase shift vector model according to antenna spacing and signal bandwidth; calculating sampling frequency offset delay and packet detection delay, according to The calculated result builds the second phase shift vector model; calculates the human respiratory signal and the direct path signal for sending and receiving according to the first phase shift vector model and the second phase shift vector model; for the human breathing signal and the sending and receiving Perform conjugate multiplication of the direct path signal to eliminate the phase offset in the signal; filter the result of the conjugate multiplication to obtain a time-domain respiration signal; calculate the respiration frequency through the time-domain respiration signal, the present disclosure Compared with the prior art, the provided method has greatly improved efficiency and accuracy. The present disclosure also provides a human respiration tracking device and system based on multipath phase cancellation.
Description
technical field [0001] The disclosure belongs to the field of signal processing, and in particular relates to a method, device and system for tracking human respiration based on multipath phase cancellation. Background technique [0002] The breathing state of the human body is an important indicator for analyzing the health status of the human body, and it is of great significance for disease diagnosis and abnormal state monitoring of the human body. However, most of the existing respiratory monitoring technologies require direct physical contact between the sensor and the monitored person, which affects the normal life of the monitored person and cannot be monitored for a long time. [0003] Radar-based methods can achieve non-contact human respiration rate estimation due to the periodic vibration of the chest cavity during respiration, which affects the propagation of electromagnetic signals. However, radar-based methods require the use of specially designed hardware, whi...
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IPC IPC(8): A61B5/08A61B5/00
CPCA61B5/0816A61B5/7225
Inventor 陈彦张东恒张冬孙启彬吴曼青
Owner 合肥中科知奇信息科技有限公司