Digital pre-distortion compensation in a wireless communications system

A system comprising:

• a communication node comprising:
• a pre-distortion actuator configured to:
• receive a carrier-modulated input signal and convert the carrier-modulated input signal into an output signal, the pre-distortion actuator comprising a behavioral model that models a transmit chain of the system including at least one amplifier and at least one antenna;
• and
• predict an input-output relationship of the transmit chain of the system between an input to the transmit chain to an output of the transmit chain;
• and
• a phased antenna array configured to receive the output signal and transmit the output signal over an air interface, wherein the phased antenna array comprises a plurality of power amplifiers and a plurality of antenna elements, each antenna element of the plurality of antenna elements electrically coupled to a respective power amplifier of the plurality of power amplifiers, wherein the pre-distortion actuator is configured to apply, according to the behavioral model, a digital pre-distortion (DPD) compensation to the carrier-modulated input signal to correct for nonlinearities and wherein the behavioral model is updated based on feedback received from a receiver from a previous output signal transmitted from the system to the receiver.

A wireless communication system comprising:

• a pre-distortion actuator configured to:
• receive a carrier-modulated signal and convert the carrier-modulated signal into an output signal, the pre-distortion actuator comprising a behavioral model that models a transmit chain of the wireless communication system including at least amplifier and at least one antenna;
• and
• predict an input-output relationship of the transmit chain of the wireless communication system between an input of the transmit chain and an output of the transmit chain;
• one or more antennas configured to receive the output signal from the pre-distortion actuator and transmit the output signal by an over-the-air (OTA) interface;
• and
• one or more power amplifiers electrically coupled between the pre-distortion actuator and the one or more antennas, wherein the pre-distortion actuator is configured to generate the output signal by applying a correction to the carrier-modulated signal that cancels out nonlinearities associated with the one or more antennas and the one or more power amplifiers, and wherein the behavioral model of the pre-distortion actuator is configured based on feedback from a receiver.

A method comprising:

• generating, via a modulator, a carrier-modulated input signal;
• converting, via a pre-distortion actuator, the carrier-modulated input signal into an output signal, wherein the pre-distortion actuator comprises a behavioral model that models a transmit chain of a system including at least one mixer, at least one amplifier and at least one antenna;
• predicting an input-output relationship of the transmit chain between an input to the transmit chain and an output of the transmit chain;
• and
• transmitting, via a phased antenna array, the output signal via an over-the-air (OTA) interface, wherein the pre-distortion actuator is configured to generate the output signal by applying a correction to the carrier-modulated input signal that cancels out nonlinearities and wherein the behavioral model is updated based on feedback received from a receiver from a previous output signal transmitted to the receiver.