Currently, the robustness of most Wi-Fi sensing systems is very limited due to that the target’s reflection signal is quite weak and can be easily submerged by the ambient noise. To address this issue, we take advantage of the fact that Wi-Fi devices are commonly equipped with multiple antennas and introduce the beamforming technology to enhance the reflected signal as well as reduce the time-varying noise. We adopt the dynamic signal energy ratio for sub-carrier selection to solve the location dependency problem, based on which a robust respiration sensing system is designed and implemented. Experimental results show that when the distance between the target and the transceiver is 7m,the mean absolute error of the respiration sensing system is less than0.729bpm and the corresponding accuracy reaches 94.79%, which out performs the baseline methods.
|Title of host publication||Proceedings of the 16th EAI International Conference on Pervasive Computing Technologies for Healthcare|
|Publication status||Accepted/In press - 11 Nov 2022|
|Event||16th EAI International Conference on Pervasive Computing Technologies for Healthcare - Thessaloniki, Greece|
Duration: 12 Dec 2022 → 14 Dec 2022
|Conference||16th EAI International Conference on Pervasive Computing Technologies for Healthcare|
|Abbreviated title||EAI Pervasive Health 2022|
|Period||12/12/22 → 14/12/22|