Over-the-air calibration of antenna system

An apparatus included in a communications system, the apparatus comprising:

• an RF section configured to generate a RF calibration signal based on modulating a calibration signal, wherein the calibration signal comprises an orthogonal code based signal, wherein the RF calibration signal is void of encoding;
• a receive section configured to receive the RF calibration signal over-the-air, wherein the receive section includes a second RF section, wherein the second RF section is configured to generate a received calibration signal based on the RF calibration signal;
• and
• a calibration section, wherein:
• the received calibration signal and a reference signal associated with the RF calibration signal comprise inputs to the calibration section;
• and
• the calibration section is configured to determine one or more of gain, baseband delay, or RF delay compensation values, based on the inputs, to calibrate the RF section.