Noise canceller

Details Noise canceller Noise canceller

2006-09-05

2006-09-05

Ghayour, Mohammed (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

C375S346000, C379S406010

Reexamination Certificate

active

07103122

ABSTRACT:
A noise canceller for removing noise components from an input signal includes a noise detector which detects a noise component of the input signal and outputs a hold signal which corresponds to duration of the noise component, a first hold circuit which outputs a sample value while holding the input signal during the duration of the noise component, an adder which adds a compensating signal to the sample value, a prediction filter which determines predicted values by performing filter operations on the outputs from the adder, a second hold circuit which outputs a predicted hold value while holding the predicted value during the duration of the noise component, a subtractor which subtracts the predicted hold value from the predicted value and outputs a result as the compensating signal, and a switch which supplies the compensating signal to the adder.

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