ADAPTIVE DIGITAL PRE-DISTORTION

摘要

Methods, systems, and devices are described for adaptive digital pre-distortion (DPD). A wireless device may identify a transmission parameter, such as data rate or transmission power, for a signal to be transmitted by a wireless modem. The wireless device may then select a power amplification response based on whether the transmission parameter exceeds a threshold. A non-linear power amplification response may be selected in cases when the data rate is low or the transmission power is high. A linear power amplification response may be selected when the data rate is high or the transmission power is low. The power amplification response may be achieved by digital distortion of the signal prior to power amplification, so selection of the response may involve adjusting a DPD compensation circuit. In some cases, the output for the non-linear response may be characterized by a Rapp model.

主权项

1. A method of adaptive digital pre-distortion (DPD), comprising:
identifying a transmission parameter for a signal to be transmitted by a wireless modem, wherein the transmission parameter is selected from the group consisting of:a transmission power and a data rate; and
selecting, based at least in part on the transmission parameter of the signal, one from the group consisting of a first power amplification response or a second power amplification response for the wireless modem, wherein the second power amplification response is more linear than the first power amplification response.