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# noise

Saturday 27 January 2018

Signals

The formal study of the information content of signals is the field of information theory.

The information in a signal is usually accompanied by noise.

The term noise usually means an undesirable random disturbance, but is often extended to include unwanted signals conflicting with the desired signal (such as crosstalk). The prevention of noise is covered in part under the heading of signal integrity. The separation of desired signals from a background is the field of signal recovery, one branch of which is estimation theory, a probabilistic approach to suppressing random disturbances.