Precoding for a non-linear codec
US7292648B1 · kind B1 · utility
1Cited by
11References
110Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2000 |
| Grant date | Nov 6, 2007 |
| Priority date | — |
| Expiry date | Mar 31, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/4927
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A precoding system to achieve rates higher than 33.6 kbps in the analog modem to digital modem direction. The preceding system modifies the standard THP algorithm to adapt it for use in PCM modems. Instead of an arithmetic modulo operation that is implemented in the transmitter, the invention defines a Discrete Modulo Operation as a function of the constellation of levels chosen. This operation performs the function of limiting the amplitude of the transmitted signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.