Adaptive digital spectral compensation and calibration of analog components and transceiver chains

A method comprising:

• receiving an input digital signal;
• pre-distorting spectral characteristics of the input digital signal;
• converting the pre-distorted digital signal to an analog signal;
• and
• providing the analog signal to one or more analog components;
• the spectral characteristics of the input digital signal being pre-distort using coefficients determined during calibration with the one or more analog components to pre-distort the spectral characteristics of the digital input signal dependent on undesired spectral characteristics of the one or more analog components couple to the D/A converter.

An apparatus comprising:

• one or more analog components coupled to receive a analog signal;
• an analog to digital (A/D) converter coupled to receive an output analog signal from the one or more analog components and to convert the output analog signal to a digital signal;
• and
• a spectral compensator coupled to receive the digital signal generated by the A/D converter;
• the spectral compensator having coefficients determined during calibration of the one or more analog components to post-distort the spectral characteristics of the digital signal dependent on the undesired spectral characteristics of the one or more analog components.

A method comprising:

• receiving an analog signal from one or more analog components;
• converting the analog signal from the one or more analog components to a digital signal;
• and
• compensating spectral characteristics of the digital signal to generate a compensated digital signal using coefficients determined during calibration of the one or more analog components to post-distort the spectral characteristics of the digital signal dependent on the undesired spectral characteristics of the one or more analog components.

A system comprising:

• a transmitter chain including:
• a pre-compensator coupled to receive digital signals and perform spectral compensation on the digital signals before the digital signals are converted to analog signals and processed by one or more analog components in the transmitter chain, the digital signals being compensated based on undesired spectral characteristics of the one or more analog components in the transmitter chain using coefficients determined during calibration of the transmitter chain;
• and
• a digital to analog (D/A) converter coupled to receive and convert the compensated digital signals generated by the pre-compensator to analog signals to be processed by the one or more analog components in the transmitter chain;
• and
• a receiver chain including:
• an analog to digital (A/D) converter coupled to receive analog signals generated by one or more analog components in the receiver chain and convert the analog signals to digital signals;
• and
• a post-compensator coupled to receive and perform spectral compensation on the digital signals generated by the A/D converter, the digital signals being compensated based on undesired spectral characteristics of the one or more analog components in the receiver chain using coefficients determined during calibration of the transmitter chain.

An apparatus comprising:

• an anti-aliasing filter (AAF) coupled to receive an input analog signal and perform anti-aliasing filtering function on the input analog signal to generate an output analog signal, the output analog signal generated by the AAF having spectral distortion;
• an analog to digital (A/D) converter coupled to convert the output analog signal generated by the AAF to a digital signal;
• and
• a spectral compensator unit coupled to receive the digital signal generated by the (A/D) converter and perform a spectral compensation function on the digital signal to compensate for spectral distortion caused by the AAF based on spectral distortion measurements of the digital signal generated by the (A/D) converter, the spectral compensator having coefficients determined during calibration with the AAF.