Robust respiration rate estimation using adaptive Kalman filtering with textile ECG sensor and accelerometer
An adaptive Kalman filter based fusion algorithm capable of estimating respiration rate for unobtrusive respiratory monitoring is proposed. Using both signal characteristics and a priori information, the Kalman filter is adaptively optimized to improve accuracy. Furthermore, the system is able to combine the respiration related signals extracted from a textile ECG sensor and an accelerometer to create a single robust measurement. We measured derived respiratory rates and, when compared to a reference, found root mean square error of 2.11 breaths per minute (BrPM) while lying down, 2.30 BrPM while sitting, 5.97 BrPM while walking, and 5.98 BrPM while running. These results demonstrate that the proposed system is applicable to unobtrusive monitoring for various applications.
2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)