Ingress noise reduction in a digital receiver
US7826569B2 · kind B2 · utility
10Cited by
17References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2008 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Sep 29, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/102
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention provides a device for reducing ingress noise in a digital signal, comprising a noise predictor for predicting an amount of ingress noise in the digital signal based on past samples of the ingress noise, and a subtractor for subtracting the predicted amount of ingress noise from the digital signal. Channel distortion is compensated for by a noise-independent equalizer, such as a ZF equalizer, placed upstream of the noise predictor. The device may be incorporated, for example, in a cable modem termination system (CMTS) of an hybrid fiber/coax (HFC) network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.