Dual memory digital predistortion for dual chain doherty power amplifier

A method of generating a transmit radio frequency (RF) signal, comprising:

• applying a first memory predistortion to an input signal to generate a first carrier predistorted signal;
• applying a second memory predistortion to the input signal to generate a first peaking predistorted signal;
• generating a carrier radio frequency (RF) signal based on the first carrier predistorted signal;
• generating a peaking radio frequency (RF) signal based on the first peaking predistorted signal;
• amplifying the carrier RF signal to generate a carrier transmit RF signal;
• amplifying the peaking RF signal to generate a peaking transmit RF signal;
• and
• combining the carrier transmit RF signal and the peaking transmit RF signal to generate a transmit RF signal.