Multi-standard transceiver, device and method

1. A multi-standard transceiver comprising:

a first subunit configured to perform signal processing according to a first communication standard;

a second subunit configured to perform signal processing according to a second communication standard; and

an interference cancellation unit configured to derive an estimated interference signal from a first signal generated by the first subunit by performing the signal processing according to the first communication standard, and perform interference cancellation on a second signal generated by the second subunit by performing the signal processing according to the second communication standard based on the estimated interference signal;

wherein the interference cancellation unit is configured to derive an echo transfer function describing a leakage of the first signal into the second signal in a baseband of the first subunit, derive the estimated interference signal based on the echo transfer function, and subtract the estimated interference signal from the second signal in a baseband of the second subunit.

2. The multi-standard transceiver according to claim 1 , further comprising a control unit configured to activate and deactivate the interference cancellation unit; and

wherein the control unit is configured to activate the interference cancellation unit if a crosstalk condition between the signal processing according to the first communication standard and the signal processing according to the second communication standard is fulfilled.

3. The multi-standard transceiver according to claim 2 , wherein the control unit is configured to activate the interference cancellation unit if a first communication signal derived from the first signal or a harmonic of the first communication signal falls into a passband of a second communication signal based on which the second subunit generates the second signal.

4. The multi-standard transceiver according to claim 1 :

wherein the first subunit is configured to perform the signal processing independently from the signal processing of the second subunit; and

wherein the second subunit is configured to perform the signal processing independently from the signal processing of the first subunit.

5. The multi-standard transceiver according to claim 1 , further comprising a control unit configured to selectively activate and deactivate the first subunit and the second subunit, and activate the interference cancellation unit if the first subunit and the second subunit are activated concurrently.

6. The multi-standard transceiver according to claim 1 , further comprising a control unit;

wherein the first subunit comprises a first frequency synthesizer configured to generate a first synthesizer signal having a first synthesizer frequency based on which the first subunit performs the signal processing according to the first communication standard;

wherein the second subunit comprises a second frequency synthesizer configured to generate a second synthesizer signal having a second synthesizer frequency based on which the second subunit performs the signal processing according to the second communication standard; and

wherein the control unit is configured to survey a relationship between the first synthesizer frequency and the second synthesizer frequency, and activate the interference cancellation unit if the relationship fulfills a predetermined condition.

7. The multi-standard transceiver according to claim 1 , configured to perform a first communication according to the first communication standard with a first external device using the first subunit, and simultaneously perform a second communication according to the second communication standard with a second external device using the second subunit.

8. The multi-standard transceiver according to claim 1 ,

wherein the first subunit is configured to generate a first communication signal according to the first communication standard, and transmit the first communication signal at a transmit frequency of the first communication standard; and

wherein the second subunit is configured to generate by reception and amplification a second communication signal at a receive frequency of the second communication standard, and perform the signal processing according to the second communication standard based on the second communication signal; and

wherein the interference cancellation unit is configured to derive the estimated interference signal such that it describes an echo portion of the first communication signal within the second communication signal.

9. The multi-standard transceiver according to claim 1 , wherein the first subunit is configured to upmix the first signal from a baseband to a transmit frequency of the first communication standard to derive a first communication signal; and

wherein the interference cancellation unit is configured to derive the estimated interference signal from the first signal in the baseband.

10. The multi-standard transceiver according to claim 9 :

wherein the second subunit is configured to derive the second signal by downmixing a second communication signal from a receive frequency of the second communication standard to the baseband; and

wherein the interference cancellation unit is configured to subtract the estimated interference signal from the second signal in the baseband, to derive a substantially interference free receive signal.

11. The multi-standard transceiver according to claim 1 , wherein the interference cancellation unit is configured to derive an echo transfer function describing a coupling between a first communication signal transmitted by the first subunit and a second communication signal received by the second subunit, update the echo transfer function in response to changes of the coupling between the first communication signal and the second communication signal, and derive the estimated interference signal based on the echo transfer function.

12. The multi-standard transceiver according to claim 1 :

wherein the first subunit comprises a transmit filter, a passband of which is adapted to a transmit frequency band of the first communication standard and a receive filter, a passband of which is adapted to a receive frequency band of the first communication standard; and

wherein the second subunit comprises a transmit filter, a passband of which is adapted to a transmit frequency band of the second communication standard and a receive filter, a passband of which is adapted to a receive frequency band of the second communication standard.

13. The multi-standard transceiver according to claim 1 :

wherein the first subunit is configured to generate a first communication signal according to the first communication standard;

wherein a maximum amplification for the first communication signal is chosen such that a maximum power of the first communication signal is equal or below an upper limit for the power defined by the first communication standard;

wherein the second subunit is configured to generate a second communication signal according to the second communication standard; and

wherein a maximum amplification for the second communication signal is chosen such that a maximum power of the second communication signal is equal to or below an upper limit for the power defined by the second communication standard.

14. The multi-standard transceiver according to claim 13 , wherein the upper limit for the power defined by the first communication standard is different from the upper limit for the power defined by the second communication standard.

15. The multi-standard transceiver according to claim 1 , wherein the first communication standard is a first RF communication standard and the second communication standard is a second, different RF communication standard.

16. The multi-standard transceiver according to claim 15 , configured to communicate simultaneously or concurrently using the first RF communication standard and the second RF communication standard.

17. A multi-standard transceiver comprising:

a first subunit configured to perform signal processing according to a first communication standard;

a second subunit configured to perform signal processing according to a second communication standard; and

an interference cancellation unit configured to derive an estimated interference signal from a first signal generated by the first subunit by performing the signal processing according to the first communication standard, and perform interference cancellation on a second signal generated by the second subunit by performing the signal processing according to the second communication standard based on the estimated interference signal,

wherein the interference cancellation unit is configured to derive an echo transfer function describing a coupling between a first communication signal transmitted by the first subunit and a second communication signal received by the second subunit, update the echo transfer function in response to changes of the coupling between the first communication signal and the second communication signal, and derive the estimated interference signal based on the echo transfer function, and

wherein the interference cancellation unit is configured to derive an n-th harmonic of the first communication signal in the baseband, the n-th harmonic of the first communication signal falling into a passband of the second communication signal, and derive the estimated interference signal by combining the echo transfer function and the n-th harmonic of the first communication signal in the baseband.

18. The multi-standard transceiver according to claim 17 , wherein the interference cancellation unit is configured to derive the echo transfer function by calculating a correlation based on the n-th harmonic of the first communication signal in the baseband and on an interference free receive signal derived by subtracting the estimated interference signal from the second signal.

19. The multi-standard transceiver according to claim 18 , wherein the interference cancellation unit is configured to frequency shift the n-th harmonic of the first communication signal in the baseband based on a difference between n-times the transmit frequency and the receive frequency.

20. A method, comprising:

performing signal processing according to a first communication standard to provide a first signal;

performing signal processing according to a second communication standard to provide a second signal;

deriving an estimated interference signal from the first signal generated by the signal processing according to the first communication standard;

performing interference cancellation on the second signal generated by the signal processing according to the second communication standard based on the estimated interference signal;

deriving an echo transfer function describing a leakage of the first signal into the second signal in a baseband of the first communication standard;

deriving the estimated interference signal based on the echo transfer function; and

subtracting the estimated interference signal from the second signal in a baseband of the second communication standard.

21. A computer readable digital non-transitory storage medium having stored thereon a computer program having a program code for performing, when running on a computer, the method comprising:

performing signal processing according to a first communication standard to provide a first signal;

performing signal processing according to a second communication standard to provide a second signal;

deriving an estimated interference signal from the first signal generated by the signal processing according to the first communication standard;

performing interference cancellation on the second signal generated by the signal processing according to the second communication standard based on the estimated interference signal;

deriving an echo transfer function describing a leakage of the first signal into the second signal in a baseband of the first communication standard;

deriving the estimated interference signal based on the echo transfer function; and

subtracting the estimated interference signal from the second signal in a baseband of the second communication standard.

22. A multi-standard transceiver, comprising:

a first subunit configured to perform signal processing according to a first communication standard, and generate a first signal by performing the signal processing according to the first communication standard;

a second subunit configured to perform signal processing according to a second communication standard, and generate a second signal by performing the signal processing according to the second communication standard;

an interference cancellation unit; and

a control unit configured to activate and deactivate the interference cancellation unit;

wherein the first subunit comprises a first frequency synthesizer configured to generate a first synthesizer signal having a first synthesizer frequency, and wherein the first subunit is configured to upmix the first signal from a baseband to the first synthesizer frequency to derive a first communication signal;

wherein the second subunit comprises a second frequency synthesizer configured to generate a second synthesizer signal having a second synthesizer frequency, and wherein the second subunit is configured to downmix the second communication signal using the second synthesizer frequency to the baseband;

wherein the control unit is configured to survey a relationship between the first synthesizer frequency and the second synthesizer frequency, and activate the interference cancellation unit if a predetermined condition for the relationship is fulfilled; and

wherein the interference cancellation unit is configured to derive an n-th harmonic of the first communication signal in the baseband, the n-th harmonic of the first communication signal falling into a passband of the second signal, to, in the baseband, frequency shift the n-th harmonic of the first communication signal in the baseband based on a relationship between the first synthesizer frequency and the second synthesizer frequency, derive an echo transfer function describing a coupling between the first communication signal and the second communication, by calculating, in the baseband, a correlation based on the frequency shifted n-th harmonic of the first communication signal in the baseband and on an interference free signal, update the echo transfer function in response to changes of the coupling between the first communication signal and the second communication signal, derive the estimated interference signal by combining, in the baseband, the echo transfer function with the frequency shifted n-th harmonic of the first communication signal in the baseband, and perform an interference cancellation on the second signal by subtracting, in the baseband, the estimated interference signal from the second signal, to derive, as a result of the interference cancellation, a substantially interference free signal.