Ingress noise reduction in a digital receiver

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

2006-09-12

2006-09-12

Ghayour, Mohammed (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

C375S232000, C370S286000

Reexamination Certificate

active

07106815

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.

REFERENCES:
patent: 4000369 (1976-12-01), Paul, Jr. et al.
patent: 5148486 (1992-09-01), Kudoh
patent: 5453797 (1995-09-01), Nicolas et al.
patent: 5546459 (1996-08-01), Sih et al.
patent: 5710996 (1998-01-01), Kajimoto et al.
patent: 5717717 (1998-02-01), Yang et al.
patent: 5995567 (1999-11-01), Cioffi et al.
patent: 6647069 (2003-11-01), Segal et al.
patent: 6647070 (2003-11-01), Shalvi et al.
patent: 6687235 (2004-02-01), Chu
patent: 6922445 (2005-07-01), Sampath et al.
patent: 6928107 (2005-08-01), Olafsson et al.
patent: 6934345 (2005-08-01), Chu et al.
G. Redaelli, et al.,Advanced Receiver to Dip Ingress Noise in HFC Return Channel, published in the conference proceedings of ISPACS 2000. 6 pages.
European Patent Office, European Search Report for European Application No. 01400956.7, Nov. 29, 2001.
Eldering C.A. et al., “CATV Return Path Characterization for Reliable Communications,” IEEE Communications Magazine, IEEE Service Center, Piscataway, N.J., US, vol. 33, No. 8, Aug. 1, 1995 pp. 62-69, XP000525541, ISSN: 0163-6804.

Affiliated with

Also associated with

Rating

Ingress noise reduction in a digital receiver does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ingress noise reduction in a digital receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ingress noise reduction in a digital receiver will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3577927