A method includes generating a reference clock using a crystal oscillator; generating a first clock based on the reference clock using a clock multiplier unit, in which a frequency of the first clock is higher than a frequency of the reference clock by a clock multiplier factor; generating a second lock based on the first clock using a frequency multiplying circuit in accordance with a frequency multiplying signal, in which a frequency of the second clock is higher than the frequency of the first clock by a factor that is equal to either five fourths or three halves, depending on whether the frequency multiplying signal is in a first state or in a second state; dividing down the second clock by a factor of two to generate a first LO (local oscillator) signal; dividing down the first LO signal by a factor of two to generate a second LO signal.

A multilane transmitter includes a plurality of transmitter lane circuits and a phase lock circuit. The phase lock circuit includes an oscillating circuit. The oscillating circuit is configured to provide clock signals corresponding to the transmitter lane circuits. The oscillating circuit includes a plurality of logic units. Clock receiving terminals of the transmitter lane circuits are coupled to an output terminal of one of the plurality of logic units.

A multilane transmitter includes a plurality of transmitter lane circuits and a phase lock circuit. The phase lock circuit includes an oscillating circuit. The oscillating circuit is configured to provide clock signals corresponding to the transmitter lane circuits. The oscillating circuit includes a plurality of logic units. Clock receiving terminals of the transmitter lane circuits are coupled to an output terminal of one of the plurality of logic units.

Certain aspects of the present disclosure provide methods and apparatus for wireless communication. One example apparatus generally includes a first transceiver configured to transmit and receive signals in a first frequency band and a second transceiver configured to transmit and receive signals in a second frequency band. The apparatus may also include a processing system coupled to the first transceiver and the second transceiver. The processing system may be configured to dynamically assign transmission operations or reception operations of a signal in the first frequency band to the second transceiver.

Certain aspects of the present disclosure provide methods and apparatus for wireless communication. One example apparatus generally includes a first transceiver configured to transmit and receive signals in a first frequency band and a second transceiver configured to transmit and receive signals in a second frequency band. The apparatus may also include a processing system coupled to the first transceiver and the second transceiver. The processing system may be configured to dynamically assign transmission operations or reception operations of a signal in the first frequency band to the second transceiver.

Examples provide an adaptation circuit and apparatus, method and computer programs for adapting, fabricating and operating, a radio transceiver, a mobile transceiver, a base station transceiver and storage for computer programs or instructions. The adaptation circuit (10) is configured to adapt a local oscillator signal in a radio transceiver (30). The radio transceiver (30) comprises a transmission branch (14) and a reception branch (16), which are subject to cross-talk. The reception branch (16) comprises a local oscillator (18) configured to generate the local oscillator signal. The adaptation circuit (10) comprises a control module (12) configured to determine crosstalk level information between the transmission branch (14) and the reception branch (16), and to adapt the local oscillator signal based on the crosstalk level information.

Examples provide an adaptation circuit and apparatus, method and computer programs for adapting, fabricating and operating, a radio transceiver, a mobile transceiver, a base station transceiver and storage for computer programs or instructions. The adaptation circuit (10) is configured to adapt a local oscillator signal in a radio transceiver (30). The radio transceiver (30) comprises a transmission branch (14) and a reception branch (16), which are subject to cross-talk. The reception branch (16) comprises a local oscillator (18) configured to generate the local oscillator signal. The adaptation circuit (10) comprises a control module (12) configured to determine crosstalk level information between the transmission branch (14) and the reception branch (16), and to adapt the local oscillator signal based on the crosstalk level information.

Certain aspects of the present disclosure provide methods and apparatus for wireless communication. One example apparatus generally includes a first transceiver configured to transmit and receive signals in a first frequency band and a second transceiver configured to transmit and receive signals in a second frequency band. The apparatus may also include a processing system coupled to the first transceiver and the second transceiver. The processing system may be configured to dynamically assign transmission operations or reception operations of a signal in the first frequency band to the second transceiver.

Certain aspects of the present disclosure provide methods and apparatus for wireless communication. One example apparatus generally includes a first transceiver configured to transmit and receive signals in a first frequency band and a second transceiver configured to transmit and receive signals in a second frequency band. The apparatus may also include a processing system coupled to the first transceiver and the second transceiver. The processing system may be configured to dynamically assign transmission operations or reception operations of a signal in the first frequency band to the second transceiver.

An I/Q imbalance calibration method includes sequentially inputting a first in-phase and quadrature signals calibration signal to a front-end circuit of the transmitter system to acquire and estimate a first and second calibration signal strengths sequentially, wherein a delta estimation is adopted; calculating an I/Q gain imbalance according to estimated first and second calibration signal strengths; sequentially inputting a second in-phase calibration signal and both of the second in-phase and quadrature calibration signal to the front-end circuit of the transmitter system to acquire and estimate a third and fourth calibration signal strengths sequentially, wherein an I/Q gain imbalance compensation is formed on the first in-phase and quadrature calibration signals to generate the second in-phase and quadrature calibration signals; and calculating an I/Q phase imbalance according to estimated third and fourth calibration signal strengths.