Patent ID: 8041306
Filing Date: 2011-10-18
Classification: H04B

Abstract:
1. An apparatus comprising: a first transmitter; a first receiver that operates with the first transmitter; a second transmitter; a second receiver that operates with the second transmitter; and a calibration circuitry coupled to perform cross-calibration on the first transmitter and the second receiver and cross-calibration on the second transmitter and the first receiver by first performing transmitter self calibration utilizing an internal feedback path, that is separate from the first and second receivers, to calibrate the first and second transmitters to obtain transmitter calibration settings and, subsequently, to perform a first loopback cross-calibration during which time the second transmitter and the first receiver are active to determine first receiver calibration settings based on feedback of second transmitter transmissions to the first receiver and, then, to perform a second loopback cross-calibration during which time the first transmitter and the second receiver are active to determine second receiver calibration settings based on feedback of first transmitter transmissions to the second receiver.