Patent ID: 8918069

Claim:
A radio frequency transmitter comprising: a modem configured to modulate one or more input data signals to generate a first modulated signal; an upconversion module configured to receive the first modulated signal and to generate a first radio frequency (“RF”) signal based on the first modulated signal; a power amplifier configured to amplify the first RF signal to generate a first amplified RF signal, the power amplifier nonlinearly causing first distortion in the first amplified RF signal; a feedback module configured to receive at least a portion of the first amplified RF signal and to downconvert the at least a portion of the first amplified RF signal to generate a downconverted feedback signal; a predistorter configured to add predistortion to a second modulated signal based on the downconverted feedback signal to reduce second distortion in a second RF amplified signal, the second distortion being caused by the power amplifier; and an attenuator configured to attenuate power of the second modulated signal based on the downconverted feedback signal to further reduce the second distortion in the second amplified RF signal.