Adaptation circuit for a transceiver

1. An adaptation circuit configured to adapt a local oscillator signal in a radio transceiver, the radio transceiver comprising a transmission branch and a reception branch, which are subject to crosstalk, the reception branch comprising a local oscillator configured to generate the local oscillator signal, the adaptation circuit comprising:

a control module configured to:

determine crosstalk level information between the transmission branch and the reception branch,

adapt the local oscillator signal based on the crosstalk level,

output a control signal for controlling the local oscillator, and

output an activation signal for the transmission branch.

2. The adaptation circuit of claim 1 , wherein the crosstalk level information comprises insulation or attenuation information between the transmission branch and the reception branch.

3. The adaptation circuit of claim 1 , wherein the control module is configured to determine the crosstalk level information based on a spectral distance between a transmission band and a reception band of the radio transceiver.

4. The adaptation circuit of claim 1 , wherein the control module is configured to determine the crosstalk level information based on a configuration of the radio transceiver in a mobile communication system.

5. The adaptation circuit of claim 1 , wherein the control module is configured to adapt a phase noise level of the local oscillator based on the crosstalk level information.

6. The adaptation circuit of claim 1 , wherein the crosstalk level information comprises transmission power information on a transmission power used in the transmission branch.

7. The adaptation circuit of claim 1 , wherein the control module is configured to adapt at least one of the group of a power supply, an amplitude, a drive strength, a supply current, a swing and a slew rate of the local oscillator based on the crosstalk level information.

8. The adaptation circuit of claim 1 , comprising a measurement module configured to determine signal quality information in the reception branch, and wherein the control module is configured to control the measurement module.

9. The adaptation circuit of claim 8 , wherein the measurement module comprises an analog-digital converter or a wideband receive signal strength indicator module.

10. The adaptation circuit of claim 8 , wherein the control module is configured to adapt the local oscillator signal using the control signal based on the signal quality information.

11. The adaptation circuit of claim 1 , comprising a storage module configured to store adaptation information for the local oscillator.

12. The adaptation circuit of claim 11 , wherein the adaptation information comprises setting or configuration information for the local oscillator.

13. The adaptation circuit of claim 1 , wherein the control module is configured to:

activate the transmission branch,

set a local oscillator frequency to a transmission frequency, and

determine the crosstalk level information based on a signal level of the transmission frequency in the reception branch.

14. The adaptation circuit of claim 13 , wherein the reception branch comprises an analog-digital converter, and wherein the control module is configured to determine the signal level of the transmission frequency by evaluating a digital output of the analog-digital converter.

15. The adaptation circuit of claim 1 , wherein the control module is configured to:

activate the transmission branch,

set a frequency of the local oscillator in the reception branch to a reception frequency, and

determine the crosstalk level information between the transmission branch and the reception branch based on receive signal strength indicator information.

16. The adaptation circuit of claim 1 , wherein the control module is configured to:

activate the transmission branch and set the transmission branch to maximum transmission power,

set a frequency of the local oscillator in the reception branch to a reception frequency, and

determine the crosstalk level information between the transmission branch and the reception branch based on a change in a receive sensitivity of the reception branch dependent on a power setting of the local oscillator.

17. The adaptation circuit of claim 1 further comprising a mixer, which is coupled to the local oscillator.

18. An apparatus consisting essentially of the radio transceiver comprising the adaptation circuit of claim 1 .

19. A mobile transceiver comprising the apparatus of claim 18 .

20. An adaptation method for adapting a local oscillator signal in a radio transceiver, the radio transceiver comprising a transmission branch and a reception branch, which are subject to cross-talk, the reception branch comprising a local oscillator configured for generating the local oscillator signal, the adaptation method comprising

determining crosstalk level information between the transmission branch and the reception branch;

adapting the local oscillator signal based on the crosstalk level information;

outputting a control signal for controlling the local oscillator; and

outputting an activation signal for the transmission branch.

21. A method for fabricating an apparatus consisting essentially of the radio transceiver comprising the method of claim 20 .

22. A method for operating an apparatus consisting essentially of the radio transceiver comprising performing the method of claim 20 on demand.

23. A non-transitory machine readable storage including machine readable instructions, that, when executed, implements the method of claim 20 .