基于FMCW毫米波雷達(dá)遠(yuǎn)于2m生命體征實(shí)時(shí)監(jiān)測(cè)系統(tǒng)研究
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Research on FMCW millimeter wave radar based real-time monitoring system forvital signs beyond
LIU Tao’，ZENG Wei2，WANG Chuchu2，JIANG Rong3，CHEN Yiqin，ZENG Sanyou2 （1.Fire and Rescue Corps of Yangzhou，Yangzhou 225ooo， China; 2.SchoolofMechanicalEngineringandElectronicInformation，China UniversityofGeoscenes，Wuhan43o4，hina; 3.Shenzhen Kaiyangxing Information Technology Co.，Ltd.， Shenzhen 5180oo， China）
Abstract：Itisdificulttoextracttheexisting long-rangeradar-based vitalsignsignals，soanimprovedadaptiveparameter variationalmodedecomposition（IAPVMD）algorithmbasedonthetraditionalvariationalmodedecompostion（VMD）forvitalsign monitoringisproposed.Thisalgorithmaimstoextracttheweakvitalsignenergyinformationfromdistantsources.Inadition， theMUICalgorithmisutilizedforspectralpeaksearching，extractingthevitalsignsignalssuefully.Experimentalresults indicate that when the detection distance is 2m and the processing window length is 1 s，the mean absolute error （MAE） of respirationisbelow10%andtheMAEofheartrateisbelow6%overacertainperiodoftime.Furthermore，theproposed algorithmshowsbeterstabilityandhigheracuracyratewhencomparingtheestimatedvitalsignsof1Osubjectswithvarious methods.Whencomparingresultsbasedondiferentdistances，theproposed method performsbestfordataacquiredatdistances over2 m.To sumup，the validity of the proposed method has been proved.
Keywords：FMCW millimeter wave radar; vital sign monitoring; VMD; IAPVMD; mode quantity; penalty coefficien
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