Patent
Moving object-reflected wireless signal identifying method
TLDR
In this article, a moving object-reflected wireless signal identifying method is proposed, which can be implemented in common commercial wireless equipment, rapid and convenient implementation can be achieved, and low cost and high benefits can be realized.Abstract:
The invention discloses a moving object-reflected wireless signal identifying method. An emitting end in a wireless transmission environment is a wireless signal emitting device, and a receiving end in the wireless transmission environment is a wireless signal receiver corresponding to the emitting end. The moving object-reflected wireless signal identifying method is characterized in that devices at the wireless signal emitting end and the wireless signal receiving end are not required, signals can be received via an antenna array of the wireless signal receiving end, a direct path signal and a static object reflection path signal are combined into a static path signal via a signal processing method, an arrival angle of the static path signal and an arrival angle of a moving object reflection path signal can be automatically identified in signal identifying processes, and therefore a moving object-reflected wireless signal can be identified. A technical solution of the moving object-reflected wireless signal identifying method is low in equipment requirements, hardware change is not required, the method can be implemented in common commercial wireless equipment, rapid and convenient implementation can be achieved, and low cost and high benefits can be realized.read more
Citations
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Patent
Wireless signal Doppler frequency shift method for determining moving object direction reflection
Daqing Zhang,Li Xiang +1 more
TL;DR: In this paper, a wireless signal Doppler frequency shift method for determining moving object direct reflection was proposed, which can use channel state information on two antennas (namely CSI) to perform conjugate multiplying to eliminate random phase shift caused by non-synchronous wireless transmit-receive devices, and can obtain complete DoP-shift information from the phase information of the CSI, including sizes and directions.
Patent
Method for identifying a wireless signal reflected by moving object
TL;DR: In this paper, a method for identifying a wireless signal reflected by a moving object was proposed, in which a direct path signal and a static object reflection path signal are combined into a static path signal by means of a signal processing method.
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Wireless signal transmission-based indoor fire detection and alarm method and system
TL;DR: In this paper, a wireless signal transmission-based indoor fire detection and alarm method and system is proposed, which comprises the following steps: step S1: a receiving terminal receiving an RF signal from a transmitting terminal, obtaining CSI data, then using a Butterworth low-pass filter to perform Gaussian white-noise removal processing on the data, and waiting until the current environment enters a stable state; step S2: performing statistical probability on the CSI data and calculating the overall probability of a fire occurring.
References
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