Wireless motion detection using multiband filters
US11913970B2 · kind B2 · utility
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23References
16Claims
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Key dates
| Filing date | Feb 21, 2020 |
| Grant date | Feb 27, 2024 |
| Priority date | — |
| Expiry date | May 30, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A wireless motion detection system is provided which uses a sharp band-stop and low-pass filters to reject unwanted low and high frequency components of a signal in the CSI. A gap in the frequency domain is caused by taking the absolute value of the signal when using the absolute value of channel matrix H∨ for motion detection. A sharp band-stop (notch) filter is used to reject any unwanted signals that have significant components in this gap. A low-pass filter is used to reject all unwanted signal after the motion highest frequency.
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