High quality power ramping in a communications transmitter
US6983025B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 11, 2001 |
| Grant date | Jan 3, 2006 |
| Priority date | — |
| Expiry date | Jul 27, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/361
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention, generally speaking, provides for control of a modulator, such as a polar modulator or conventional linear modulator, to produce high quality RF signals that ramp quickly from a condition of minimal output power to a condition of information-bearing modulation at a specified output power and back down to the condition of minimal output power. Using a polar modulator, for example, it is theoretically possible to perform ramping without degrading the transient measurements beyond the degradation caused by the information-bearing modulation itself. This ideal can be closely approached in practice. Such ramping can be achieved without the need for extensive unit-by-unit calibration on the manufacturing line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.