Advances in Bioengineering and Biomedical Science Research(ABBSR)

Spiral Communications Inc, Canada

Publications

• Research Article   
  Time Frequency Analyses of stationary and non-stationary signals using MATLAB functions and Toolboxes
  Author(s): Yousef Ali Abohamra*, Vaughn Cosman and Maria Rey
  
  Time-frequency analysis of non-stationary signals in a noisy environment is a challenging research subject spanning many areas, and often requires simultaneous signal decomposi- tion in the time and frequency domains. Non-stationary signals are composed of numerous frequencies and irregularly changing amplitudes in time. Unlike sinusoidal waves, square waves, and other types of stationary signals, non-stationary signals do not have repeated patterns that can be easily characterized and modeled. The analysis of non-stationary signals requires a special methodological approach and mathematical means, which allow discovery and analysis of the main features of the non-stationary signal using signal transformation. The general method for signal analysis is to apply Fourier transformations. However, Fourier transform analysis provides actual spectra only for stationary signals. Also, the Fo.. Read More»
  

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