Low power microwave systems for heartbeat rate detection at 2.4, 5.8, 10 and 16 GHz

2015 International Conference on Advances in Biomedical Engineering (ICABME)

et al. 2015

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Abstract-This paper presents a wireless measurement system for cardiopulmonary activity. This system generates a continuous wave signal at 2.4 GHz toward the target and then measures the reflected signal. The target is the person's chest set at a distance of 1 m. The radar system contains a vector network analyzer, which measures the phase of S 21 . The phase variation of S 21 contains information about heart and respiration activity. Measurements are performed with two different conditions, while the person is holding respiration for 10 seconds and then breathing normally for the same duration. Filtering is used as processing technique to separate heartbeat signal from respiratory signal in the second case. The measurements were performed simultaneously with a PC-based electrocardiograph which is used as a reference to validate the information extracted from the measured signals.

Section: System Descriptionmentioning

confidence: 99%

Measurements of cardiac and cardiopulmonary activities using contactless Doppler radar

El-Samad

2015 International Conference on Advances in Biomedical Engineering (ICABME)

et al. 2015

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“…Since the heartbeat rate is based on the detection of the signal peaks, a smoothing method is applied in order to reduce the number of surrounding peaks. This method is based on the Newton relation, which is described in [16,17].…”

Section: Measurement Setupmentioning

confidence: 99%

ECG vs. single-antenna system for heartbeat activity detection

Proceedings of the 4th International Symposium on Applied Sciences in Biomedical and Communication Technologies

Sadek

et al. 2011

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“…Several processing techniques are applied to separate heartbeat and respiratory signals based on band-pass filters [5], continuous-wavelet filters and ensemble empirical mode decomposition (EEMD) [6], and LMS adaptive harmonic cancellation algorithm [7].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of heartbeat detection behind a wall using CW Doppler radar

El-Samad

2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)

et al. 2016

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This paper presents a wireless measurement system for cardiopulmonary activity detection behind a wall. This system generates a continuous wave signal and is used at 2 different frequencies: 2.4 GHz and 10 GHz. The transmitted signal is directed toward the patient's chest situated at 1 m and then reflected. The radar system is based on a vector network analyzer, which measures the phase of S 21. The phase variation of S 21 contains information about heart and respiration activity. Measurements are carried out every 30 seconds, for a person sitting at a distance of 1 meter, directly in front of the system or behind a wall. Discrete wavelet transform is used as a processing technique to separate heartbeat signal from respiratory signal. The measurements were performed simultaneously with a PCbased electrocardiogram (ECG) which is used as a reference to validate the information extracted from the measured signals.