Howtosignalprocessing
- What does a whitening filter do?
- What is whitening in rf?
- What is whitening of a signal?
- How do you whiten a spectrum?
What does a whitening filter do?
Whitening filters are widely used across the spectrum of fields for signal whitening or noise pre-whitening where the data is modelled as a random vector or as a wide-sense stationary (WSS) process.
What is whitening in rf?
3 Principle of data whitening
In an RF system, transmitted data is grouped into packets. These packets may contain long sequences of 0's and 1's which can introduce a DC bias into the transmitted signal. A radio signal with a DC bias will have a non-uniform power distribution over the occupied channel bandwidth.
What is whitening of a signal?
The whitening process is often used for ambient vibration data before stacking waveforms for cross-correlation. The process is simple as Fourier transforming the signal after applying Hann window, then normalizing its magnitude, and then inverse Fourier transforming it.
How do you whiten a spectrum?
The commonest form of spectral whitening is to split the dataset into several narrow frequency bands by bandpass filtering, equalising the sections by AGC (or some other scaling function) and add the resulting sections together.
