Patent ID: 8615204

Claim:
A wireless communication device configured to calibrate one transceiver chain that is transmitting a first output signal while another transceiver chain is concurrently transmitting a second output signal, comprising: a first transceiver chain including a first transmit circuit and a first receive circuit coupled in parallel between a core logic and a first antenna, the first transceiver chain further including a loopback path configured to route the first output signal as a loopback calibration signal from the first transmit circuit directly to the first receive circuit; a second transceiver chain including a second transmit circuit and a second receive circuit coupled in parallel between the core logic and a second antenna, wherein the second transceiver chain transmits the second output signal via the second antenna while the first transceiver chain transmits the first output signal via the first antenna; and an interference processor connected between the second transmit circuit and the first receive circuit, wherein the interference processor is configured to process the second output signal to generate a compensation signal that eliminates, from the loopback calibration signal, unwanted components of the second output signal received by the first antenna.