简介：PuLsetransittime(FIT)isusedasanoninvasiveandcull-lessparametertoestimatebloodpressure.Inthispaper,wedevelopanalgorithmtoobtainFTTrapidly,whichisappropriateformicro-processorandcouldachievegoodaccuracyinPTT,eveninnoisymeasurements.Thealgorithmisbasedonfiniteimpulseresponse(FIR)filtertoreducethenoiseandanadaptivethresholdtodetectthesignificantpointsofECGandPPG.EvaluationofthismethodisbasedonthesignalsfromourPTr-basedbloodpressuredevices.ItisshownthatthemethodworkswellforPPTcalculation.
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