Howtosignalprocessing
- How does white noise affect signal?
- Is white noise a normal distribution?
- How is white noise measured?
- Is white noise uniformly distributed?
How does white noise affect signal?
What is white noise and how does it affect a signal? The constant hiss in the background. The more white noise, the harder it is to interpret the signal. Too much white noise may lead to signal loss.
Is white noise a normal distribution?
In signal processing, white noise need not be normal. However in time-series analysis, a "white-noise process" (often simply called white noise) is normally distributed.
How is white noise measured?
The random process X(t) is called a white noise process if SX(f)=N02, for all f. Before going any further, let's calculate the expected power in X(t). We have E[X(t)2]=∫∞−∞SX(f)df=∫∞−∞N02df=∞. Thus, white noise, as defined above, has infinite power!
Is white noise uniformly distributed?
For uniform white noise, the PDF of the amplitudes of the time domain samples is uniform within the specified maximum and minimum levels. In other words, all amplitude values between some limits are equally likely or probable. Thermal noise produced in active components tends to be uniform white in distribution.
