Digital predistortion and uptilt and cable communication
US9660675B2 · kind B2 · utility
4Cited by
6References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 29, 2015 |
| Grant date | May 23, 2017 |
| Priority date | — |
| Expiry date | Dec 29, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0425
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Otherwise incompatible digital predistortion and uptilt can be used together, such as in a cable television or other cable communications system having a frequency-dependent signal loss at high frequencies. The predistortion can be used to compensate for a nonlinear gain compression of a power amplifier at higher frequencies. Additional uptilt and equalizer circuits can be included to address deleterious distortion effects that may otherwise arise by using predistortion and uptilt together. Training and adaptation of various components are described. Fine and coarse uptilt adjustments can be provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.