Extraction method and device of breath and heartbeating signals in life probe radar

The invention provides extraction method and device of breath and heartbeating signals in life probe radar. The method comprises the following steps of: pre-processing a radar receiving signal; carrying out empirical mode decomposition to the pre-processed signal to acquire finite inherent modal functions; quickly carrying out Fourier transform to each decomposed inherent modal function; respectively calculating total capacity, breath frequency band capacity and heartbeating frequency band capacity corresponding to each inherent modal function; and selecting the corresponding inherent modal functions according to the proportion relation of the total capacity, breath frequency band capacity and heartbeating frequency band capacity to respectively reconstruct breath and heartbeating signals. By adopting the method and the device provided by the invention, the breath and heartbeating signals can be extracted more accurately, thereby the invention has the self-adaptation characteristic and can be adapted to the c