Journal of Bioengineering & Biomedical Science

Mansy HA

Publications

• Research Article
  Effect of Noise on Time-frequency Analysis of Vibrocardiographic Signals
  Author(s): Taebi A and Mansy HATaebi A and Mansy HA
  
  Recordings of biological signals such as vibrocardiography often contain contaminating noise. Noise sources may include respiratory, gastrointestinal, and muscles movement, or environmental noise. Depending on individual physiology and sensor location, the vibrocardiographic (VCG) signals may be obscured by these noises in the time-frequency plane, which may interfere with automated characterization of VCG. In this study, polynomial chirplet transform (PCT) and smoothed pseudo Wigner-Ville distribution (SPWVD) were used to estimate the instantaneous frequency (IF) of two simulated VCG signals. One simulated signal contained a time-varying IF while the other had a fixed IF. The error in estimating IF was then calculated for signal-to-noise ratios (SNR) from -10 to 10 dB. Analysis was repeated 100 times at each level of noise using randomized sets of white noise. Error analysis showed t.. Read More»
  DOI: 10.4172/2155-9538.1000202

  Abstract PDF