Multi-carrier transmitting apparatus and method
US6810027B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 12, 2000 |
| Grant date | Oct 26, 2004 |
| Priority date | — |
| Expiry date | Apr 12, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2637
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A multi-carrier transmitting apparatus and method is described, wherein a plurality of carrier signals are combined in the digital domain and supplied to a D/A converting means (3) for converting the combined digital carrier signals into an analog signal to be transmitted. The frequency characteristic of the D/A converting means (3) is compensated by scaling means (51 to 54) for pre-scaling individual ones of said plurality of carrier signals before being combined and supplied to D/A converting means (3). The pre-scaling may be performed by multiplying digital data, representing the carrier signals, by corresponding frequency-dependent digital scaling words. Thereby, the need for signal processing intensive digital filters or non-ideal analog filters can be prevented. In case a digital power control is provided, the scaling word can be combined with a power control word.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.