Howtosignalprocessing
A signal is said to be stationary if its frequency or spectral contents are not changing with respect to time.
- What are stationary and non-stationary signals?
- How do you know if a signal is stationary?
- Is ECG a non-stationary signal?
- What is stationary noise?
What are stationary and non-stationary signals?
A stationary time series has statistical properties or moments (e.g., mean and variance) that do not vary in time. Stationarity, then, is the status of a stationary time series. Conversely, nonstationarity is the status of a time series whose statistical properties are changing through time.
How do you know if a signal is stationary?
If the properties of the process that generates the events DOES NOT change in time, then the process is stationary.
Is ECG a non-stationary signal?
ECG signal is a weak, non-stationary, and nonlinear signal, which indicates the health of a heart in terms of temporal variations of electromagnetic pulses from the heart.
What is stationary noise?
A sound or SOUND OBJECT whose AMPLITUDE is relatively unchanging. However, in any natural sound the SPECTRUM is always changing (see diagram under FOURIER ANALYSIS) and there are usually slight fluctuations in amplitude even in what appears to be a steady sound.
