Amplitude/phase delay calibration for envelope-tracking amplifier
US8605774B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2011 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Dec 26, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/321
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system and method for estimating a time delay introduced by an envelope tracking amplifier (ETA) of a transmitter. The ETA receives a first baseband signal that is generated by the transmitter and operates on the first baseband signal to produce an output signal. The receiver receives a second baseband signal in response to the transmitter's transmission of the output signal. The receiver generates a model signal that represents an estimate of the first baseband signal. The receiver computes a first time delay between the amplitude envelopes of the second baseband signal and the model signal. The receiver computes a second time delay between phase signals derived respectively from the second baseband signal and the model signal. The receiver estimates the time delay that is introduced by the ETA of the transmitter by subtracting the second time delay from the first time delay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.