RADIO FREQUENCY TRANSCEIVER WITH LOCAL OSCILLATOR CONTROL FOR MULTI-CARRIER APPLICATIONS

摘要

Radio frequency (RF) communication circuitry comprises an RF transceiver and conflict detection circuitry. The RF transceiver includes a first communication path configured to down-convert received RF signals using a first local oscillator (LO) receive frequency; and a second communication path configured to down-convert received RF signals using a second LO receive frequency and to operate simultaneously with the first communication path. The conflict detection circuitry is configured to determine path crosstalk using the first and second LO receive frequencies and using a first LO transmit frequency used by the first RF transceiver or a second RF transceiver to up-convert electrical signals for RF transmission, and initiate a change of the first LO receive frequency by a first frequency shift value and a change of the second LO receive frequency by a second frequency shift value in response to the path crosstalk.