Impulse noise effect reduction

Details Impulse noise effect reduction Impulse noise effect reduction

1995-12-29

1997-12-30

Chin, Stephen

Pulse or digital communications

Equalizers

Automatic

36472419, G06F 1710, H04B 110

Patent

active

057039046

ABSTRACT:
In a receiver system embodying the invention, the amplitude of the input signal is sensed so that when it exceeds a predetermined level, the adaptation of adaptive filters employed in the receiver is inhibited. In one embodiment of the invention the adaptation is inhibited for the extent of time that the sensed signal exceeds the predetermined level. In another embodiment of the invention, the adaptation is inhibited for a fixed period of time whenever the sensed signal exceeds the predetermined level. In still another embodiment of the invention, where the noise impulse has some repetitive pattern, an inhibiting signal is generated in anticipation of a repetitive noise impulse to inhibit adaptation of the adaptive filters during the period of time ("window") the noise impulse occurs.

REFERENCES:
patent: 4462048 (1984-07-01), Ross
patent: 4672630 (1987-06-01), Kaku
patent: 4754419 (1988-06-01), Iwata
patent: 5517527 (1996-05-01), Ya
patent: 5559840 (1996-09-01), Melas et al.
patent: 5602869 (1997-02-01), Scott

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