System for generating an analogue I/Q signal from two or more data streams
US7151805B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 7, 2000 |
| Grant date | Dec 19, 2006 |
| Priority date | — |
| Expiry date | Jan 2, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and method for generating an I/Q signal for an I/Q modulator (10). The signal is composed of two or more data streams, which have been edited according to identical or different modulation methods. A known modulation encoder is used to generate corresponding digital I/Q values from a first inputted digital data stream. The I/Q values then undergo a digital-analogue conversion (8) that generates the corresponding analogue I/Q signals. The system includes an additional modulation generator that calculates digital I/Q values, or generates I/Q values from an additional inputted digital data stream. The digital I/Q values of the modulation encoder and the digital I/Q values of the modulation generator (10) are then added together, using digital adders (A3) located upstream of the digital-analogue converter (8).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.