Transmit power control utilizing loopback error vector magnitude thresholds
US8565343B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2011 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Jan 30, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/367
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A device and method for adjusting transmit power in a wireless communication device. The wireless communication device comprises a transmitter having a power amplifier, wherein the amplifier may introduce distortion into the transmit signal. The method may periodically determine an error vector magnitude (EVM) level in the transmitter of the wireless communication device. The EVM level may be determined based on differences between an ideal transmit signal without amplification, and an actual transmit signal with amplification. The method may then adjust one or more transmit gain settings of at least one gain stage of the wireless device based on the measured EVM level in the transmitter. In one embodiment, as the EVM increases, indicating that more distortion is being introduced, the method may reduce the gain settings of the gain stage(s) to reduce this distortion. If the EVM decreases, the method may increase the gain of the gain stage(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.