Hybrid FMCW-interferometry radar system in the 5.8 GHz ISM band for indoor precise position and motion detection

Wang, Guochao; Gu, Changzhan; Inoue, Takao; Li, Changzhi

doi:10.1109/mwsym.2013.6697623

Cited by 38 publications

(17 citation statements)

References 4 publications

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“…Moreover, SFCW radars combine some advantages of both single-tone CW radars and FMCW radars and thus have been used successfully in cardio-respiration detection [16]. Li et al reported a hybrid radar system combining the advantages of single-tone and FMCW radars [17]. With very high-range resolution owing to its wideband nature, IR-UWB radars have been efficiently implemented on silicon [18] and have the potential for realizing accurate detection of respiratory rate and apnea in adults and infants [19].…”

Section: Introductionmentioning

confidence: 99%

Short-Range Vital Signs Sensing Based on EEMD and CWT Using IR-UWB Radar

Jin

2016

Sensors

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The radar sensor described realizes healthcare monitoring capable of detecting subject chest-wall movement caused by cardiopulmonary activities and wirelessly estimating the respiration and heartbeat rates of the subject without attaching any devices to the body. Conventional single-tone Doppler radar can only capture Doppler signatures because of a lack of bandwidth information with noncontact sensors. In contrast, we take full advantage of impulse radio ultra-wideband (IR-UWB) radar to achieve low power consumption and convenient portability, with a flexible detection range and desirable accuracy. A noise reduction method based on improved ensemble empirical mode decomposition (EEMD) and a vital sign separation method based on the continuous-wavelet transform (CWT) are proposed jointly to improve the signal-to-noise ratio (SNR) in order to acquire accurate respiration and heartbeat rates. Experimental results illustrate that respiration and heartbeat signals can be extracted accurately under different conditions. This noncontact healthcare sensor system proves the commercial feasibility and considerable accessibility of using compact IR-UWB radar for emerging biomedical applications.

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Section: Introductionmentioning

confidence: 99%

Short-Range Vital Signs Sensing Based on EEMD and CWT Using IR-UWB Radar

Jin

2016

Sensors

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“…Moreover, SFCW radars carry some advantages of both singletone CW radars and FMCW radars and thus have been used successfully in cardio-respiration detection [16]. In addition, Li et al reported a hybrid radar system combining the advantages of single-tone and FMCW radars [17]. With very high-range resolution owing to its wideband nature, IR-UWB radars have been efficiently implemented on silicon [18] and have the potential for realizing accurate detection of respiratory rate and apnea in adults and infants [19].…”

Section: Introductionmentioning

confidence: 99%

Short-Range Vital Signs Sensing Based on EEMD and CWT Using IR-UWB Radar

Jin

2016

Preprint

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The radar sensor described realizes healthcare monitoring capable of detecting subject chest-wall movement caused by cardiopulmonary activities, and wirelessly estimating the respiration and heartbeat rates of the subject without attaching any devices to the body. Conventional single-tone Doppler radar can only capture Doppler signatures because of a lack of bandwidth information with noncontact sensors. In contrast, we take full advantage of impulse radio ultra-wideband (IR-UWB) radar to achieve low power consumption and convenient portability, with a flexible detection range and desirable accuracy. A noise reduction method based on improved ensemble empirical mode decomposition (EEMD) and a vital sign separation method based on the continuous-wavelet transform (CWT) are proposed jointly to improve the signal-tonoise ratio (SNR) in order to acquire accurate respiration and heartbeat rates. Experimental results illustrate that respiration and heartbeat signals can be extracted accurately under different conditions. This noncontact healthcare sensor system proves the commercial feasibility and considerable accessibility of using compact IR-UWB radar for emerging biomedical applications.

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“…Wang et al [22,23] introduced a hybrid frequency-modulated continuous wave (FMCW) interferometry radar sensor, in which the transmitted signal is a sequence of alternating single-tone signals and linear chirp signals. By incorporating the FMCW mode and the CW interferometry mode, it can detect absolute distance as well as relative displacement motions.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Life Detection and Localization Using a Wideband Chaotic Signal with an Embedded Tone

Liu

Guo

et al. 2016

Sensors

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A hybrid life detection radar system which transmits a wideband chaotic signal containing an embedded single-tone is proposed. The chaotic signal is used for target localization by the time-domain correlation method and synthetic aperture technique, and the single-tone signal is used to measure the frequencies of breathing and heartbeat based on an on-chip split-ring integrated sensor and Michelson interference principle. Experimental results in free space and in through-wall scenarios demonstrate that the system can realize human detection and localization simultaneously with high range resolution, high sensitivity, and large dynamic range without complex signal processing. The range resolution is about 10 cm, and the dynamic range is 35 dB for the respiration signal detection and 25 dB for the heartbeat signal detection. Due to its good immunity to interference/jamming and high spectrum efficiency, the proposed system is suitable for post-disaster rescue, elder/infant/patient vitality monitoring, and anti-terrorism enforcement applications.

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Hybrid FMCW-interferometry radar system in the 5.8 GHz ISM band for indoor precise position and motion detection

Cited by 38 publications

References 4 publications

Short-Range Vital Signs Sensing Based on EEMD and CWT Using IR-UWB Radar

Short-Range Vital Signs Sensing Based on EEMD and CWT Using IR-UWB Radar

Short-Range Vital Signs Sensing Based on EEMD and CWT Using IR-UWB Radar

Simultaneous Life Detection and Localization Using a Wideband Chaotic Signal with an Embedded Tone

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