Wireless devices having multiple transmit chains with predistortion circuitry
US9634695B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2016 |
| Grant date | Apr 25, 2017 |
| Priority date | — |
| Expiry date | Sep 19, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An electronic device may include wireless communications circuitry that has first and second digital predistortion circuits. The first predistortion circuit receives a first signal at a first frequency while the second predistortion circuit receives a second signal at a second frequency. The first circuit may perform predistortion operations on the first signal using non-unity predistortion coefficients to generate a predistorted signal. The second circuit may apply unity predistortion coefficients to the second signal to generate an undistorted signal. An adder may combine the predistorted and undistorted signals to generate a combined signal that is amplified by amplifier circuitry. An antenna may transmit the amplified signal. By over-distorting the first signal with the first predistortion circuit while the second predistortion circuit does not distort the second signal, the circuitry may mitigate non-linearity in the amplifier while allowing for carrier aggregation operations to be performed with minimal power consumption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.