Efficiency of power amplifiers in devices using transmit beamforming
US6993299B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2004 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | Jun 14, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0669
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Systems and methods for optimizing the efficiency of each of a plurality of power amplifiers that amplify a corresponding one of a plurality of radio frequency signals for transmission by a corresponding one of a plurality of antennas. Using transmit beamforming, the power of each amplified signal output by the power amplifiers may not be the same for all the power amplifiers, and may vary with changes in the communication channel between the transmitting device and receiving device. Each of the plurality of power amplifiers is controlled to operate with one or more operating parameters that optimize the efficiency for an output power level of corresponding ones of the radio frequency signals. By adjusting one or more operating parameters of each power amplifier according to changing requirements (e.g., the destination device and channel conditions), the efficiency of each power amplifier can be optimized. Consequently, one or more of the power amplifiers are operated with one or more operating parameters that reflects the output power actually needed for the corresponding radio frequency signal to be transmitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.