Indoor Motion Detection Method Based on Channel Frequency Domain Response

Abstract

The invention provides an indoor motion detecting method based on channel frequency domain response. According to the indoor motion detecting method based on the channel frequency domain response, because expression accuracy of CFR to multiple diameters reaches a subcarrier layer, finer wireless link expression is realized by CFR over CIR, thereby realizing lower report error rate and mis-alarm rate over CIR detection. On the other hand, a frequency domain digital characteristic is used as a measured value. In a wireless multipath environment, a time domain corresponds with distributed time delay of each multipath signal, and the frequency domain is obtained through superposing multipath signals. Disturbance to a single path is superposed on each frequency point. Therefore the frequency domain digital characteristic is more sensitive than the time domain digital characteristic to environment change, and furthermore report omission rate reduction is realized.

Description

technical field [0001] The invention relates to a detection method, in particular to an indoor motion detection method based on channel frequency domain response. Background technique [0002] Indoor motion detection is an emerging technology for detecting the presence of moving objects in an area of ​​interest without requiring any equipment to be carried by the detected object. This technology plays a vital role in many applications, such as intrusion detection in security, monitoring of patients in hospitals, care of the elderly and children at home, detection of signs of life in fires or earthquakes, and in battlefields. military applications, etc. In these applications, users may not be able to carry equipment for positioning or detection in advance. Therefore, traditional device-based techniques are no longer applicable. [0003] With the continuous development of the wireless network, its coverage area is also wider and wider, and it is feasible to realize the pass...

AI Technical Summary

Problems solved by technology

Although many people have done research in this area and made some progress, the CIR-based scheme still has shortcomings such as too rough distinction and sensitivity to environmental noise.

Therefore, the situation of false detection and false positive will occur frequently, this is because the CIR changes caused by movement (especially by slow and slight target movement) can only be reflected in the single path delay information of CIR, which may be overwhelmed In the multipath variation of CIR

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