Life Signal Extraction Based on Multi-channel Frequency Modulated Continuous Wave Radar

QU Lele; LIU Shujie; YANG Tianhong; SUN Yanpeng

doi:10.11999/JEIT211073

Volume 44 Issue 4

Apr. 2022

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Article Navigation > Journal of Electronics & Information Technology > 2022 > 44(4): 1318-1326

QU Lele, LIU Shujie, YANG Tianhong, SUN Yanpeng. Life Signal Extraction Based on Multi-channel Frequency Modulated Continuous Wave Radar[J]. Journal of Electronics & Information Technology, 2022, 44(4): 1318-1326. doi: 10.11999/JEIT211073

Citation:

QU Lele, LIU Shujie, YANG Tianhong, SUN Yanpeng. Life Signal Extraction Based on Multi-channel Frequency Modulated Continuous Wave Radar[J]. Journal of Electronics & Information Technology, 2022, 44(4): 1318-1326. doi: 10.11999/JEIT211073

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Life Signal Extraction Based on Multi-channel Frequency Modulated Continuous Wave Radar

doi: 10.11999/JEIT211073

College of Electronic Information Engineering, Shenyang Aerospace University, Shenyang 110136, China

Funds: The National Natural Science Foundation of China (61671310), The Xingliao Talents Program Foundation of Liaoning Province (XLYC1907134), The Aeronautical Science Foundation of China (2019ZC054004), The Scientific Research Foundation of the Education Department of Liaoning Province (LJKZ0172, JYT2020015)

Received Date: 2021-10-08
Accepted Date: 2022-03-16
Rev Recd Date: 2022-03-15

Available Online: 2022-03-21

Publish Date: 2022-04-18

Abstract

Abstract

In order to solve the problem that the Frequency Modulated Continuous Wave (FMCW) radar could not guarantee the detection accuracy of life signal, a life signal extraction method based on multichannel FMCW radar is proposed in this paper. After the proposed method achieves the reconstruction of the range profiles and the extraction of phase signal corresponding to each equivalent receiving channel, the Maximum Ratio Combining (MRC) technique is used to fuse the phase signals from the multiple receiving channels. Then the Variational Mode Decomposition (VMD) is adopted to decompose the fused phase signal to reconstruct the life signal. Finally, the Fast Fourier Transform (FFT) is performed on the reconstructed the life signal to obtain the respiration rate and heartbeat rate. The experimental results show that the proposed life signal extraction method based on multichannel FMCW radar can extract the life signal more robustly and accurately compared to single channel FMCW radar. In addition, the combined MRC and VMD signal processing method outperforms the combined MRC and Band-Pass Filter (BPF) method.

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References(17)

References

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