| 摘要 |
Digital predistorters DPD1 and DPD2 are used in the main and envelope paths of an envelope tracking transmitter amplifier system. The predistorter DPD2 corrects distortion at the output of the envelope amplifier EA. Envelope tracking of the driver amplifier DA, and load modulation of the power amplifier PA, improves the overall power added efficiency (PAE) when transmitting signals with a high peak to average power ration (PAPR). The power amplifier PA may be bypassed. The transmitter may be used in a satellite or an earth station. |
