Respiration and heartbeat signal separation method and device based on blind source separation

A blind source separation and heartbeat signal technology, applied in the field of biomedical signal processing, can solve problems such as inability to breathe and heartbeat signal separation, and achieve the effect suitable for family health monitoring

Active Publication Date: 2016-09-28
BEIJING QUALITY & ZEAL INFORMATION TECH CO LTD
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Problems solved by technology

[0003] At present, the bio-radar researched at home and abroad is mostly aimed at single-person human targets, but in actual family health monitoring, the detection target is often not limited to a single individual, for example, real-time monitoring and early warning of the breathing and heartbeat of elderly couples during sleep, If the breathing and heartbeat signal processin

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  • Respiration and heartbeat signal separation method and device based on blind source separation
  • Respiration and heartbeat signal separation method and device based on blind source separation
  • Respiration and heartbeat signal separation method and device based on blind source separation

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Embodiment Construction

[0033] Below, the embodiments of the present invention will be described in detail in conjunction with the accompanying drawings, but it is not intended to limit the present invention.

[0034] The method for separating the breathing and heartbeat signals of two persons based on blind source separation provided by the present invention is implemented based on blind source separation (Blind Source Separation). Before introducing the details of the embodiments of the present invention in detail, some concepts and steps of blind source separation are briefly described.

[0035] Blind source separation is a kind of blind signal processing, which refers to separating the signal source signal from the observed mixed signal when the transmission channel is unknown or unpredictable, so as to achieve the best estimation of the signal source.

[0036] With column vector S(t)=[s 1 (t),s 2 (t),...s N (t)] T Signal s representing N unknown signal sources i (t), i=1,2,...,N, with X(t)=...

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Abstract

The invention provides a respiration and heartbeat signal separation method and device based on blind source separation. The method comprises the steps that 1, time frequency domain analysis is conducted on all biological radar echo signals, and time-frequency distribution signals of biological radar echoes corresponding to all targets are obtained; 2, on the basis of the time-frequency distribution signals, frequency spectrum centroid curves of all the biological radar echoes are obtained; 3, all the frequency spectrum centroid curves serve as observed signals, blind source separation is conducted, and micro change signals corresponding to all the targets are obtained; 4, filtering is conducted on the micro change signals, and respiratory time-varying signals and heartbeat time-varying signals which correspond to all the targets are obtained. According to the respiration and heartbeat signal separation method and device based on blind source separation, the biological radar echo signals of two target human bodies can be processed, and the respiration and heartbeat signals for each target are separated out.

Description

technical field [0001] The invention relates to the field of biomedical signal processing, in particular to a method and device for separating respiratory and heartbeat signals based on blind source separation. Background technique [0002] Vital parameters such as breathing and heartbeat of the human body are key measurement objects for disease diagnosis and monitoring of human health status. At present, the measurement of vital parameters of breathing and heartbeat has developed from traditional contact measurement methods such as electrocardiogram and breathing belt to non-contact detection methods based on bioradar. Bio-radar emits electromagnetic waves in the microwave or terahertz band, and its echoes are modulated by body surface micro-movements caused by human breathing, heartbeat and other life activities. Measure precisely. [0003] At present, the bio-radar researched at home and abroad is mostly aimed at single human body targets, but in actual family health mo...

Claims

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Application Information

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IPC IPC(8): A61B5/0205A61B5/00
Inventor 黄亦谦
Owner BEIJING QUALITY & ZEAL INFORMATION TECH CO LTD
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