Ingress noise reduction in a digital receiver

Details Ingress noise reduction in a digital receiver Ingress noise reduction in a digital receiver

2010-09-27

2011-11-15

Ahn, Sam K (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

Reexamination Certificate

active

08059769

ABSTRACT:
The invention provides a device (D2) for reducing ingress noise in a digital signal, comprising a noise predictor (20) for predicting an amount of ingress noise in the digital signal (sn) based on past samples of the ingress noise, and a subtractor (21) for subtracting the predicted amount of ingress noise from the digital signal. Channel distortion is compensated for by a noise-independent equalizer (25), such as a ZF equalizer, placed upstream of the noise predictor (20). The device (D2) may be incorporated, for example, in a cable modem termination system (CMTS) of an hybrid fiber/coax (HFC) network.

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