Personnel respiration and heartbeat detection method based on millimeter wave radar
A millimeter wave radar, heartbeat detection technology, applied in the evaluation of respiratory organs, radio wave measurement systems, radio wave reflection/re-radiation, etc. Stability, the effect of reducing the amount of calculation
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[0029] In the following, the embodiments of the present invention will be described in detail and clearly in combination with the embodiments and the accompanying drawings.
[0030] The present invention is a method for extracting human respiration and heartbeat waveform and frequency estimation based on FMCW millimeter wave radar, such as figure 1 As shown, firstly, the radar transmits a linear FM pulse train signal to the target human body and receives the echo signal. After deskewing and filtering the echo signal, it is discretized into a sampling matrix, and FFT is performed on each row in the matrix to obtain the time- Range image Rp(m,n); Each column of Rp is used as a distance unit, and the center of the constellation diagram is used to eliminate the clutter of all distance units; CFAR is used to detect the existing targets in each distance unit, and each human target is given The distance unit where it is located, and Doppler demodulation; use the improved EEMD algorit...
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