Techniques for receiver non-linearity calibration

A method for correcting distortion in an analog input signal, the method comprising:

• storing, in a memory having a plurality of memory addresses, a concatenation of two or more distortion correction terms;
• receiving, based on the analog input signal having the distortion, an N-bit digital signal;
• modifying the N-bit digital signal to generate a modified signal;
• applying the modified signal to the memory, wherein the modified signal represents one of the plurality of memory addresses;
• outputting, from the memory, an M-bit output representing contents of the memory address specified by the modified signal;
• modifying the M-bit output to separate the M-bit output into the two or more distortion correction terms;
• generating, based on the two or more distortion correction terms, a correction digital signal;
• and
• applying the correction digital signal to the N-bit digital signal.

A system for correcting distortion in an analog input signal, the system including an analog-to-digital converter configured for receiving the analog input signal having the distortion, the analog-to-digital converter configured for generating an N-bit digital signal, the system comprising:

• a digital processing circuit configured for receiving the N-bit digital signal, the digital processing including:
• a memory having a plurality of memory addresses and configured for receiving the N-bit digital signal;
• wherein the digital processing circuit is configured for:
• concatenating two or more distortion correction terms;
• storing the concatenation of the two or more distortion correction terms in a memory address;
• modifying the N-bit digital signal to generate a modified signal;
• applying the modified signal to the memory, wherein the modified signal represents one of the plurality of memory addresses;
• outputting, from the memory, an M-bit output representing contents of the memory address specified by the modified signal;
• modifying the M-bit output to separate the M-bit output into the two or more distortion correction terms;
• generating, based on the two or more distortion correction terms, a correction digital signal;
• and
• applying the correction digital signal to the N-bit digital signal.