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A Novel Method for Multi-person Respiratory and Heartbeat Signals Extraction
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Jun SI1, Yingpan LIU1, Junjun XIONG1, Lei BAI1, Jian WU1, Chuangwei DING2
Telecommunication Engineering | 2025, 65(11) : 1929 - 1936
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Telecommunication Engineering | 2025, 65(11): 1929-1936
• Electronics and Information Engineering •
A Novel Method for Multi-person Respiratory and Heartbeat Signals Extraction
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Jun SI1, Yingpan LIU1, Junjun XIONG1, Lei BAI1, Jian WU1, Chuangwei DING2
Affiliations
  • 1The 723rd Institute of China State Shipbuilding Corporation Limited，Yangzhou 225101，China
  • 2School of Electronic and Optical Engineering Nanjing University of Science and Technology，Nanjing 210094，China
Published: 2025-11-28 doi: 10.20079/j.issn.1001-893x.240314003
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For the problems of multi-person vital sign detection at the same distance and extraction of heartbeat signals under the interference of respiratory higher harmonics, an algorithm based on digital beamforming and orthogonal projection filter (OPF ) is proposed. After the radar measures multiple baseband signals, digital beamforming is first performed to obtain the vital sign signals of people by generating multiple beams pointing to the subjects in space. Then, using the OPF, the obtained vital sign signals are projected onto the null space of their respective respiratory higher harmonics to achieve the removal of respiratory higher harmonic interference and the real-time acquisition of heartbeat signals. The results of multi-person experiments show that the proposed algorithm can successfully separate the detection of multi-person vital sign signals and the extraction of heartbeat signals, and the accuracy rate of heartbeat frequency estimation is as high as 99.68%.

multi-person vital signs detection  /  respiration harmonic  /  heartbeat signal extraction  /  digital beamforming  /  orthogonal projection filter
Jun SI, Yingpan LIU, Junjun XIONG, Lei BAI, Jian WU, Chuangwei DING. A Novel Method for Multi-person Respiratory and Heartbeat Signals Extraction[J]. Telecommunication Engineering, 2025 , 65 (11) : 1929 -1936 . DOI: 10.20079/j.issn.1001-893x.240314003
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Year 2025 volume 65 Issue 11
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Article Info
doi: 10.20079/j.issn.1001-893x.240314003
  • Receive Date：2024-03-14
  • Online Date：2026-04-15
  • Published：2025-11-28
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  • Received：2024-03-14
  • Revised：2024-08-03
Affiliations
    1The 723rd Institute of China State Shipbuilding Corporation Limited，Yangzhou 225101，China
    2School of Electronic and Optical Engineering Nanjing University of Science and Technology，Nanjing 210094，China
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表12种不同金属材料的力学参数
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Family		 属数
Number of
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Number of
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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