Radio frequency noise canceller

Details Radio frequency noise canceller Radio frequency noise canceller

1997-04-04

1999-11-30

Pham, Chi H.

Pulse or digital communications

Receivers

Interference or noise reduction

455296, G09B 300, H04B 110

Patent

active

059955678

ABSTRACT:
A receiver or receiver system for high speed data communications having a radio frequency noise canceller is disclosed. The radio frequency noise canceller removes radio-frequency noise from received signals over a transmission medium by adaptively estimating the radio-frequency noise during data transmission. In one embodiment, the radio frequency noise canceller includes: an adaptive filter for producing a noise cancellation signal by filtering a reference noise signal based on filter parameters, a subtractor for subtracting the noise cancellation signal from the first signal to produce the second signal; and an update circuit for enabling, at predetermined times, modification of the parameters of the adaptive filter based on the then existing second signal. A method for removing radio frequency noise is also disclosed.

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