Patent ID: 7873325

Claim:
An apparatus comprising: a first radio frequency (RF) transmitter; a first RF receiver that operates with the first RF transmitter; a second RF transmitter; a second RF receiver that operates with the second RF transmitter; and a calibration control circuitry coupled to perform calibration operations on the first and second RF transmitters and the first and second RF receivers by first performing self calibration on the first and second RF transmitters and subsequently using the first and second RF transmitters that have been calibrated to perform cross-core calibration on the first and second RF receivers, the calibration control circuitry to perform transmitter self calibration by utilizing an internal feedback path that is separate from the RF receivers to calibrate the RF transmitters to obtain transmitter calibration settings for the first and second RF transmitters, the calibration control circuitry to perform calibration operations on the first and second RF receivers by performing a first loopback calibration operation during which time the second RF transmitter and the first RF receiver are active to determine first receiver calibration settings for the first RF receiver based on transmissions from the second RF transmitter and by performing a second loopback calibration operation during which time the first RF transmitter and the second RF receiver are active to determine second receiver calibration settings for the second RF receiver based on transmissions from the first RF transmitter.