Architecture of nonlinear RF filter-based transmitter

摘要

Systems and methods for compensating for a non-linear characteristic of a non-linear filter in a transmit chain of a transmitter using predistortion are disclosed. In one embodiment, a transmitter includes a power amplifier configured to amplify a radio frequency input signal to provide an amplified radio frequency signal, a non-linear filter configured to filter the amplified radio frequency signal to provide an output signal of the transmitter, and a predistorter configured effect predistortion of the amplified radio frequency signal, where the predistortion compensates for a non-linear characteristic of the non-linear filter. In this manner, the output signal is as if the non-linear filter were a linear, or substantially liner, filter. The predistortion applied by the predistorter may be fixed or adaptive.

主权项

1. A transmitter comprising:
a power amplifier configured to amplify a radio frequency input signal to provide an amplified radio frequency signal; a non-linear filter configured to filter the amplified radio frequency signal to provide an output signal; and a predistorter configured to effect predistortion of the amplified radio frequency signal to compensate for a non-linear characteristic of the non-linear filter.