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To solve this problem, a new method for vital sign detection is proposed which is based on impulse ultra\u2010wideband (UWB) radar. The range is determined based on the continuous wavelet transform (CWT) of the variance of the received signals. In addition, the TVF\u2010EMD method is used to obtain the information of respiration and heartbeat frequency. Fifteen sets of experiments were carried out, and the echo radar signals of 5 volunteers at 3 different distances were collected. The analysis results of the measured data showed that the proposed algorithm can accurately and effectively extract the distance to the target human and its vital signs information, which shows vast prospects in research and application.<\/jats:p>","DOI":"10.1155\/2021\/2136614","type":"journal-article","created":{"date-parts":[[2021,8,18]],"date-time":"2021-08-18T00:35:08Z","timestamp":1629246908000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Applications of TVF\u2010EMD in Vital Signal Detection for UWB Radar"],"prefix":"10.1155","volume":"2021","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1270-2088","authenticated-orcid":false,"given":"Zhen","family":"Yang","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6106-8098","authenticated-orcid":false,"given":"Chi","family":"Ma","sequence":"additional","affiliation":[]},{"given":"Qingjie","family":"Qi","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6056-257X","authenticated-orcid":false,"given":"Xin","family":"Li","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4065-1110","authenticated-orcid":false,"given":"Yan","family":"Li","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2021,8,17]]},"reference":[{"key":"e_1_2_9_1_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.sigpro.2015.09.022"},{"key":"e_1_2_9_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.dsp.2016.07.014"},{"key":"e_1_2_9_3_2","first-page":"1","article-title":"A statistical analysis of multipath interference for impulse radio UWB systems","volume":"352","author":"Stanciu M. 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