System and method for time-interpolated power change in a digital pre-distortion circuit
US10951249B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2020 |
| Grant date | Mar 16, 2021 |
| Priority date | — |
| Expiry date | Mar 26, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0425
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transmit circuit operated with time-interpolated digital pre-distortion (DPD) coefficients to improve adjacent channel power ratio (ACPR) performance during a power mode change is provided. The transmit circuit includes a DPD circuit configured to operate with a first DPD coefficient according to a first transmit power level of a transmit power amplifier of the transmit circuit. The transmit circuit further includes a DPD coefficient management engine configured to retrieve a second DPD coefficient corresponding to the second transmit power level. The transmit circuit further includes a DPD coefficient time-interpolation engine configured to compute a set of time-interpolated DPD coefficients corresponding to a set of time instants for a transient period when the transmit power amplifier is adapted to the second DPD coefficient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.