Method for determining calibration parameter of zero intermediate frequency radio receiver, and zero intermediate frequency radio receiver

A zero intermediate frequency radio receiver, wherein the zero intermediate frequency radio receiver comprises:

• an obtaining unit, configured to obtain a plurality of sub-band training signals, wherein a sum of the plurality of sub-band training signals is a fullband training signal;
• and
• a determining unit, configured to determine a sub-band calibration parameter corresponding to each of the plurality of sub-band training signals, wherein
• the determining unit is further configured to determine a fullband calibration signal according to the plurality of sub-band training signals and the sub-band calibration parameter corresponding to each of the plurality of sub-band training signals;
• and
• the determining unit is further configured to perform coefficient fitting on the fullband training signal and the fullband calibration signal, to determine a fullband calibration parameter.

A zero intermediate frequency radio receiver, wherein the zero intermediate frequency radio receiver comprises:

• a preprocessing circuit, configured to:
• receive a plurality of sub-band training signals, and perform preprocessing on the plurality of sub-band training signals, to determine a plurality of processed sub-band training signals, wherein the preprocessing comprises demodulation, low-pass filtering, and analog-to-digital conversion, and a sum of the plurality of processed sub-band training signals is a processed fullband training signal;
• and
• a digital signal processor, configured to determine a sub-band calibration parameter corresponding to each of the plurality of processed sub-band training signals, wherein
• the digital signal processor is further configured to determine a fullband calibration signal according to the plurality of processed sub-band training signals and the sub-band calibration parameter corresponding to each of the plurality of processed sub-band training signals;
• and
• the digital signal processor is further configured to perform coefficient fitting on the processed fullband training signal and the fullband calibration signal, to determine a fullband calibration parameter.