Method and apparatus for controlling transmission energy in a communication system employing orthogonal transmit diversity
US6421327B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1999 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Jun 28, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W52/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention is a novel and improved method and apparatus for control transmission energy. The present invention describes a closed loop power control system that operates in conjunction with a transmitter using orthogonal transmit diversity. In a first embodiment of the present invention, the receiver evaluates the signal to noise ratio (SNR) of the two components of the signal. A weighted sum of these two components emphasizing the weaker of the two signals is generated and used in the generation of the power control commands. In a second embodiment of the present invention, the SNR of the two component signals are calculated and two separate power control commands are generated based on a corresponding one of the calculated SNR values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.