{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,14]],"date-time":"2026-03-14T18:22:42Z","timestamp":1773512562025,"version":"3.50.1"},"reference-count":32,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2022,9,6]],"date-time":"2022-09-06T00:00:00Z","timestamp":1662422400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"China Coal Technology &amp; Engineering Group Co., Ltd.","award":["2019-2-ZD003"],"award-info":[{"award-number":["2019-2-ZD003"]}]},{"name":"China Coal Technology &amp; Engineering Group Co., Ltd.","award":["51804161"],"award-info":[{"award-number":["51804161"]}]},{"name":"China Coal Technology &amp; Engineering Group Co., Ltd.","award":["52074156"],"award-info":[{"award-number":["52074156"]}]},{"name":"China Coal Technology &amp; Engineering Group Co., Ltd.","award":["2020011017"],"award-info":[{"award-number":["2020011017"]}]},{"name":"China Coal Technology &amp; Engineering Group Co., Ltd.","award":["2020M680490"],"award-info":[{"award-number":["2020M680490"]}]},{"name":"National Natural Science Foundation Youth Project of China","award":["2019-2-ZD003"],"award-info":[{"award-number":["2019-2-ZD003"]}]},{"name":"National Natural Science Foundation Youth Project of China","award":["51804161"],"award-info":[{"award-number":["51804161"]}]},{"name":"National Natural Science Foundation Youth Project of China","award":["52074156"],"award-info":[{"award-number":["52074156"]}]},{"name":"National Natural Science Foundation Youth Project of China","award":["2020011017"],"award-info":[{"award-number":["2020011017"]}]},{"name":"National Natural Science Foundation Youth Project of China","award":["2020M680490"],"award-info":[{"award-number":["2020M680490"]}]},{"name":"The National Natural Science Foundation of China","award":["2019-2-ZD003"],"award-info":[{"award-number":["2019-2-ZD003"]}]},{"name":"The National Natural Science Foundation of China","award":["51804161"],"award-info":[{"award-number":["51804161"]}]},{"name":"The National Natural Science Foundation of China","award":["52074156"],"award-info":[{"award-number":["52074156"]}]},{"name":"The National Natural Science Foundation of China","award":["2020011017"],"award-info":[{"award-number":["2020011017"]}]},{"name":"The National Natural Science Foundation of China","award":["2020M680490"],"award-info":[{"award-number":["2020M680490"]}]},{"name":"Langfang City Science and Technology Support Plan Project","award":["2019-2-ZD003"],"award-info":[{"award-number":["2019-2-ZD003"]}]},{"name":"Langfang City Science and Technology Support Plan Project","award":["51804161"],"award-info":[{"award-number":["51804161"]}]},{"name":"Langfang City Science and Technology Support Plan Project","award":["52074156"],"award-info":[{"award-number":["52074156"]}]},{"name":"Langfang City Science and Technology Support Plan Project","award":["2020011017"],"award-info":[{"award-number":["2020011017"]}]},{"name":"Langfang City Science and Technology Support Plan Project","award":["2020M680490"],"award-info":[{"award-number":["2020M680490"]}]},{"name":"China Postdoctoral Science Foundation","award":["2019-2-ZD003"],"award-info":[{"award-number":["2019-2-ZD003"]}]},{"name":"China Postdoctoral Science Foundation","award":["51804161"],"award-info":[{"award-number":["51804161"]}]},{"name":"China Postdoctoral Science Foundation","award":["52074156"],"award-info":[{"award-number":["52074156"]}]},{"name":"China Postdoctoral Science Foundation","award":["2020011017"],"award-info":[{"award-number":["2020011017"]}]},{"name":"China Postdoctoral Science Foundation","award":["2020M680490"],"award-info":[{"award-number":["2020M680490"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>As a new method to detect vital signs, Ultra-wideband (UWB) radar could continuously monitor human respiratory signs without contact. Aimed at addressing the problem of large interference and weak acquisition signal in radar echo signals from complex scenes, this paper adopts a UWB radar echo signal processing method that combines strong physical sign information extraction at P time and Variational Mode Decomposition (VMD) to carry out theoretical derivation. Using this novel processing scheme, respiration and heartbeat signals can be quickly reconstructed according to the selection of the appropriate intrinsic mode functions (IMFs), and the real-time detection accuracy of human respiratory signs is greatly improved. Based on an experimental platform, the data collected by the UWB radar module were first verified against the measured values obtained at the actual scene. The results of a validation test proved that our UWB radar echo signal processing method effectively eliminated the respiratory clutter signal and realized the accurate measurement of respiratory and heartbeat signals, which would prove the existence of life and further improve the quality of respiration and heartbeat signal and the robustness of detection.<\/jats:p>","DOI":"10.3390\/s22186726","type":"journal-article","created":{"date-parts":[[2022,9,8]],"date-time":"2022-09-08T04:18:32Z","timestamp":1662610712000},"page":"6726","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Research on Ultra-Wideband Radar Echo Signal Processing Method Based on P-Order Extraction and VMD"],"prefix":"10.3390","volume":"22","author":[{"given":"Qingjie","family":"Qi","sequence":"first","affiliation":[{"name":"Emergency Science Research Academy, China Coal Research Institute, China Coal Technology & Engineering Group Co., Ltd., Beijing 100070, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9191-9845","authenticated-orcid":false,"given":"Youxin","family":"Zhao","sequence":"additional","affiliation":[{"name":"Emergency Science Research Academy, China Coal Research Institute, China Coal Technology & Engineering Group Co., Ltd., Beijing 100070, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4777-3970","authenticated-orcid":false,"given":"Liang","family":"Zhang","sequence":"additional","affiliation":[{"name":"Emergency Science Research Academy, China Coal Research Institute, China Coal Technology & Engineering Group Co., Ltd., Beijing 100070, China"}]},{"given":"Zhen","family":"Yang","sequence":"additional","affiliation":[{"name":"Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao 125105, China"}]},{"given":"Lifeng","family":"Sun","sequence":"additional","affiliation":[{"name":"Emergency Science Research Academy, China Coal Research Institute, China Coal Technology & Engineering Group Co., Ltd., Beijing 100070, China"}]},{"given":"Xinlei","family":"Jia","sequence":"additional","affiliation":[{"name":"Emergency Science Research Academy, China Coal Research Institute, China Coal Technology & Engineering Group Co., Ltd., Beijing 100070, China"}]}],"member":"1968","published-online":{"date-parts":[[2022,9,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"13053","DOI":"10.1038\/s41598-018-31411-8","article-title":"A novel non-contact heart rate monitor using impulse-radio ultra-wideband (IR-UWB) radar technology","volume":"8","author":"Lee","year":"2018","journal-title":"Sci. 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