Mobile communication device and method for adaptive RF front-end tuning

A method for adaptively tuning a radio frequency (RF) device comprising RF front-end circuitry, the method comprising:

• sweeping an RF frequency of a transmit signal over multiple frequencies in at least a part of an RF transmit band and in at least a part of a receive band;
• during the sweeping detecting RF power in a receiver as a function of the multiple RF frequencies of the transmit signal;
• determining information from the detected RF power as a function of the multiple RF frequencies of the transmit signal;
• adjusting the RF front-end circuitry to a selected frequency response using the information after the sweeping has been completed and the information has been determined;
• applying production tuning processes to inter-stage filters in a receive and transmit chain, providing scalar RF network analyzer functionality into the RF front-end circuitry between a receive antenna and a transmit antenna;
• reverting to appropriate settings for operation of the RF front-end circuitry by activating explicit coupling elements or de-activating shielding and filtering elements between the transmit antenna and the receive antenna;
• and
• setting an update rate to a rate selected for coping with user intervention.

An apparatus of a mobile communications device, the apparatus comprising:

• a processor to adaptively tune radio frequency (RF) front-end circuitry, configured to:
• sweep a transmit signal over multiple RF frequencies in at least a part of an RF transmit band and in at least a part of a receive band;
• during the sweep, detect RF power in a receiver as a function of the multiple RF frequencies of the transmit signal;
• determine information from the detected RF power as a function of the multiple RF frequencies of the transmit signal;
• adjust the RF front-end circuitry to a selected frequency response using the information after the sweeping has been completed and the information has been determined;
• and
• sweep the multiple RF frequencies of the transmit signal in a spectrum adjacent to a transmit band when the transmit signal is isolated at an input of a receive antenna, and use information in the transmit signal of a transmitter of the RF front-end circuitry to identify that RF energy detected at a receiver of the RF front-end circuitry originates from the transmitter of the RF front-end circuitry.

At least one non-transitory machine readable medium comprising instructions that, when executed by the machine, cause the machine to perform operations for adaptively tuning a radio frequency (RF) device comprising RF front-end circuitry, the operations comprising:

• sweeping a transmit signal over multiple RF frequencies in at least a part of an RF transmit band and in at least a part of a receive band;
• during the sweeping, detecting RF power in a receiver as a function of the multiple RF frequencies of the transmit signal;
• determining information from the detected RF power as a function of the multiple RF frequencies of the transmit signal;
• and
• adjusting the RF front-end circuitry to a selected frequency response using the information after the sweeping has been completed and the information has been determined,
• wherein the sweeping the multiple RF frequencies of the transmit signal comprises sweeping the multiple RF frequencies of the transmit signal in a spectrum adjacent to the transmit band when the transmit signal is isolated at an input of a receive antenna, and using information in the transmit signal of a transmitter of the RF front-end circuitry to identify that RF energy detected at a receiver of the RF front-end circuitry originates from the transmitter of the RF front-end circuitry.

A method for adaptively tuning a radio frequency (RF) device comprising RF front-end circuitry, the method comprising:

• sweeping an RF frequency of a transmit signal over multiple frequencies in at least a part of an RF transmit band and in at least a part of a receive band;
• during the sweeping, detecting RF power in a receiver as a function of the multiple RF frequencies of the transmit signal;
• determining information from the detected RF power as a function of the multiple RF frequencies of the transmit signal;
• adjusting the RF front-end circuitry to a selected frequency response using the information after the sweeping has been completed and the information has been determined;
• and
• one of deactivating or moving in a frequency domain band stop elements that provide transmit isolation to improve insertion loss in response to the RF device entering idle mode, a time division duplex (TDD) mode or a time division multiple access (TDMA) mode.