Shared feedback for adaptive transmitter pre-distortion

A method for applying digital pre-distortion in a transmitter, the method comprising:

• applying digital pre-distortion to a baseband transmit signal to obtain a pre-distorted signal;
• amplifying the pre-distorted signal using a power amplifier to obtain a transmit signal;
• passing the transmit signal through one or more shared receivers to obtain a feedback signal;
• and
• adjusting the digital pre-distortion applied to the baseband transmit signal according to the feedback signal.

An apparatus comprising:

• means for applying digital pre-distortion to a baseband transmit signal to obtain a pre-distorted signal;
• means for amplifying the pre-distorted signal using a power amplifier to obtain a transmit signal;
• means for passing the transmit signal through one or more shared receivers to obtain a feedback signal;
• and
• means for adjusting the digital pre-distortion applied to the baseband transmit signal according to the feedback signal.

A computer-program product for adjusting digital pre-distortion, the computer-program product comprising a non-transitory computer-readable medium having instructions thereon, the instructions comprising:

• code for causing a wireless device to apply digital pre-distortion to a baseband transmit signal to obtain a pre-distorted signal;
• code for causing the wireless device amplify the pre-distorted signal using a power amplifier to obtain a transmit signal;
• code for causing the wireless device to pass the transmit signal through one or more shared receivers to obtain a feedback signal;
• and
• code for causing the wireless device to adjust the digital pre-distortion applied to the baseband transmit signal according to the feedback signal.