| Presentation | 2021-05-20 A Study of Decreasing Respiratory Frequency Effect Using High Pass Filter in a Pre-Processing of Discrete Wavelet transform on Heart-rate Estimation with mm-Wave FMCW Radar Ryosuke Koyanaka, Shunsuke Sato, Yaokun Hu, Takeshi Toda, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In recent years, studies on noncontact detection of vital signs such as heartbeat and respiration using radar have progressed. The problem of those studies is separating respiratory and heartbeat signal. We have utilized discrete wavelet transform to extract heartbeat signals from radar vital signs by 77GHz-band FMCW radar. In a previous report, the frequencies of respiration and respiratory harmonics had been decreased in radar vital signs using adaptive filtering. The cutoff frequency was changed based on the frequency of respiration estimated by DWT. After applying the adaptive filter for radar vital signs, DWT was applied again to improve SNR and accuracy. That method has two problems that the circuit scale is large and if the frequency of respiratory harmonics is close to the frequency of heartbeat, heartbeat frequency is also decreased. In this paper, the frequency of respiration was decreased by applying HPF before conducting DWT to improve SNR and accuracy of estimating heartbeat calculated from the front, back, diagonally upward 60 degrees, and ceiling. The result of 5 subjects from the front showed that SNR was improved by about 2 dB and the accuracy of estimating heart rate was improved by about 0.012 Hz. SNRs obtained from the others direction were also improved. While RMSEs obtained from back, ceiling was not improved. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | FMCW radar / Respiration / Heart rate / Vital sign monitoring / Discrete wavelet transform |
| Paper # | WBS2021-9,RCC2021-9,MICT2021-6 |
| Date of Issue | 2021-05-13 (WBS, RCC, MICT) |
| Conference Information | |
| Committee | WBS / RCC / SAT / MICT |
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| Conference Date | 2021/5/20(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online (Zoom) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Coding, Modulation, Signal processing, Reliable Communication and Control, Healthcare and Medical Information Communication Technologies, and General |
| Chair | Masanori Hamamura(Kochi Univ. of Tech.) / HUAN-BANG LI(NICT) / Hisashi Sujikai(NHK) / Eisuke Hanada(Saga Univ.) |
| Vice Chair | Takashi Shono(INTEL) / Masahiro Fujii(Utsunomiya Univ.) / Shunichi Azuma(Nagoya Univ.) / Koji Ishii(Kagawa Univ.) / Hiroyasu Ishikawa(Nihon Univ.) / Tetsushi Ikegami(Meiji Univ.) / Hirokazu Tanaka(Hiroshima City Univ.) / Daisuke Anzai(Nagoya Inst. of Tech.) |
| Secretary | Takashi Shono(Okayama Univ. of Science) / Masahiro Fujii(National Defence Academy) / Shunichi Azuma(CRIEPI) / Koji Ishii(Osaka Univ.) / Hiroyasu Ishikawa(NHK) / Tetsushi Ikegami(KDDI Research) / Hirokazu Tanaka(Kobe Univ.) / Daisuke Anzai(Yokohama National Univ.) |
| Assistant | Duong Quang Thang(NAIST) / Masafumi Moriyama(NICT) / Masayuki Kinoshita(Chiba Univ. of Tech.) / SHAN LIN(NICT) / Masaki Ogura(Osaka Univ.) / Takuya Okura(NICT) / Daisuke Goto(NTT) / Keita Saku(Kyushu Univ.) / Kai Ishida(KISTEC) / Kento Takabayashi(Okayama Pref. Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Wideband System / Technical Committee on Reliable Communication and Control / Technical Committee on Satellite Telecommunications / Technical Committee on Healthcare and Medical Information Communication Technology |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study of Decreasing Respiratory Frequency Effect Using High Pass Filter in a Pre-Processing of Discrete Wavelet transform on Heart-rate Estimation with mm-Wave FMCW Radar |
| Sub Title (in English) | |
| Keyword(1) | FMCW radar |
| Keyword(2) | Respiration |
| Keyword(3) | Heart rate |
| Keyword(4) | Vital sign monitoring |
| Keyword(5) | Discrete wavelet transform |
| 1st Author's Name | Ryosuke Koyanaka |
| 1st Author's Affiliation | Nihon University(Nihon Univ.) |
| 2nd Author's Name | Shunsuke Sato |
| 2nd Author's Affiliation | Nihon University(Nihon Univ.) |
| 3rd Author's Name | Yaokun Hu |
| 3rd Author's Affiliation | Nihon University(Nihon Univ.) |
| 4th Author's Name | Takeshi Toda |
| 4th Author's Affiliation | Nihon University(Nihon Univ.) |
| Date | 2021-05-20 |
| Paper # | WBS2021-9,RCC2021-9,MICT2021-6 |
| Volume (vol) | vol.121 |
| Number (no) | WBS-24,RCC-25,MICT-27 |
| Page | pp.pp.44-49(WBS), pp.44-49(RCC), pp.28-33(MICT), |
| #Pages | 6 |
| Date of Issue | 2021-05-13 (WBS, RCC, MICT) |