Signal-adaptive and time-dependent analog-to-digital conversion rate in a ranging receiver

An electronic device, comprising:

• a ranging receiver configured to receive a return signal corresponding to a transmit signal, down convert the return signal, and equalize the down converted return signal, wherein the equalization comprises a proportional gain applied to the down converted return signal based at least in part on a frequency of the down converted return signal, wherein a higher frequency has a higher gain;
• and wherein the ranging receiver is further configured to calibrate the ranging receiver based at least in part on the proportional gain, store the calibration as a calibration factor, and digitally correct the equalized down converted return signal;
• and
• an analog-to-digital converter (ADC), with a time-variant sampling rate, configured to convert the return signal from an analog domain to a digital domain, resample an output, and adjust the time-variant sampling rate based at least in part on a correlation corresponding to the output.

A method for sampling a return signal, comprising:

• by a ranging receiver:
• receiving the return signal corresponding to a transmit signal;
• converting, using a local oscillator, the return signal to a down converted return signal;
• equalizing the down converted return signal based at least in part on a frequency of the down converted return signal;
• calibrating the ranging receiver;
• converting, using an analog-to-digital converter (ADC), the return signal from an analog domain to a digital domain, wherein the ADC has a time-variant sampling rate;
• correcting the equalized down converted return signal in the digital domain;
• and
• resampling an output, and adjusting the time-variant sampling rate based at least in part on a correlation corresponding to the output.