To solve the problem that the heartbeat signal has low energy and is difficult to be extracted accurately under the strong inter-ference of respiration signal,a heart rate monitoring method based on multi-sequence WOA-VMD algorithm is proposed.Firstly,the tar-get range is determined based on the variance of the received signals.The multi-sequence vital signs vector is constructed to shorten the observation time.Subsequently,the WOA algorithm and the VMD algorithm are combined to optimize the parameters and extract heart-beat signal accurately.Eventually,the echo radar signals of 8 volunteers at different distances are collected by using ultra-wideband ra-dar for experiments.As a result,the proposed method can suppress respiratory interference and achieve higher accuracy with the lowest average error ratio of 1.36％.
维普
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