Through-wall tumble detection early warning system and early warning method based on Lora signal
The invention discloses a through-wall tumble detection early warning system and early warning method based on Lora signals, a transmitter and a receiver are placed on the same side of a partition wall environment in a room, the receiver is provided with two antennas which can receive signals reflec...
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| creator | PAN YUCHI YANG XU NIU QIANG LIN YUHAN XU XIAO BAO ZHONGXU CHEN PENGPENG ZHANG XUEHAN YIN YUQING |
| description | The invention discloses a through-wall tumble detection early warning system and early warning method based on Lora signals, a transmitter and a receiver are placed on the same side of a partition wall environment in a room, the receiver is provided with two antennas which can receive signals reflected and diffracted by the transmitter through multiple paths in the environment at the same time, the influence of phase deviation is eliminated by using signal division operation, and the detection accuracy of the through-wall tumble detection early warning system based on the Lora signals is improved. Clock synchronization is performed on the transmitting signal and the receiving signal; in order to deal with the problem of weak signals caused by Lora signal partition wall propagation attenuation, a time domain aliasing method is used for amplifying the signals, a time-frequency spectrum of the signals is extracted, and signal entropy information, a power mutation curve and a signal-to-noise ratio are calculated |
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Clock synchronization is performed on the transmitting signal and the receiving signal; in order to deal with the problem of weak signals caused by Lora signal partition wall propagation attenuation, a time domain aliasing method is used for amplifying the signals, a time-frequency spectrum of the signals is extracted, and signal entropy information, a power mutation curve and a signal-to-noise ratio are calculated</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ALARM SYSTEMS CALCULATING COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS COMPUTING COUNTING ORDER TELEGRAPHS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS |
| title | Through-wall tumble detection early warning system and early warning method based on Lora signal |
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