Minimal adaptive notch filter for respiratory frequency tracking
- Resource Type
- Conference
- Authors
- Caiani, E.G.; Porta, A.; Terrani, M.; Guzzetti, S.; Malliani, A.; Cerutti, S.
- Source
- Computers in Cardiology 1999. Vol.26 (Cat. No.99CH37004) Computers in cardiology 1999 Computers in Cardiology, 1999. :511-514 1999
- Subject
- Bioengineering
Computing and Processing
Signal Processing and Analysis
Adaptive filters
Transfer functions
Heart
Cardiology
Monitoring
Hoses
Narrowband
Frequency measurement
Delay
Bandwidth
- Language
A method based on the use of a minimal order adaptive notch filter able to monitor changes in the respiratory frequency is proposed. The notch frequency of the filter is updated via a recursive least squared algorithm. The respiratory frequency is tracked during spontaneous and controlled breathing in healthy young subjects. Results demonstrate that, even when paced, respiratory frequency is variable and its variability depends on the breathing rate.