Tuning digital pre-distortion for a transmitter to correct non-linear errors in a receiver

A system comprising:

• receiver circuitry to measure a first error vector of a pulse amplitude modulation (PAM) sequence in a first signal received from a transmitter and to measure a second error vector in a second signal received from the transmitter after the first signal;
• and
• control logic coupled to the receiver circuitry, the control logic to:
• generate a first non-linear error vector from the first error vector;
• modify a set of LUT values based on analysis of the first non-linear error vector;
• provide the modified set of LUT values to the transmitter to be used in transmitting the second signal;
• generate a second non-linear error vector from the second error vector that is smaller than that of the first non-linear error vector;
• modify the set of LUT values based on analysis of the second non-linear error vector;
• and
• provide the modified set of LUT values, based on the analysis of the second non-linear error vector, to the transmitter to be used in subsequent signal transmissions.

A method comprising:

• measuring, using receiver circuitry, a first error vector of a pulse amplitude modulation (PAM) sequence in a first signal received from a transmitter and to measure a second error vector in a second signal received from the transmitter after the first signal;
• generating, using control logic coupled to the receiver circuitry, a first non-linear error vector from the first error vector;
• modifying a set of LUT values based on analysis of the first non-linear error vector;
• providing the modified set of LUT values to the transmitter to be used in transmitting the second signal;
• generating a second non-linear error vector from the second error vector that is smaller than that of the first non-linear error vector;
• modifying, by the control logic, the set of LUT values based on analysis of the second non-linear error vector;
• and
• providing, by the control logic, the modified set of LUT values, based on the analysis of the second non-linear error vector, to the transmitter to be used in subsequent signal transmissions.