Apparatus and a method for processing a signal depending on a received radio frequency signal

1. An apparatus for processing a signal depending on a received radio frequency signal, comprising:

a first semiconductor circuit including a first part of a radio frequency receiver and a first data converter circuit configured to convert a data value of the signal depending on the received radio frequency signal from an integer format to a floating point format;

a second semiconductor circuit including a second part of the radio frequency receiver and a second data converter circuit configured to convert data representing the data value in the floating point format to the integer format; and

a digital interface circuit configured to transmit data related to the signal depending on the received radio frequency signal from the first semiconductor circuit to the second semiconductor circuit,

wherein the first data converter circuit is configured to provide the data representing the data value in the floating point format to the digital interface circuit, and

wherein the first data converter circuit is configured such that a most significant bit of a mantissa of the data representing the data value in the floating point format is not provided to the digital interface if the exponent of the data representing the data value in the floating point format is different from a lowest possible exponent in the floating point format.

2. The apparatus of claim 1 , wherein the second semiconductor circuit further includes a baseband processing circuit.

3. The apparatus of claim 1 , wherein a number of bits used to represent the data value in the integer format is higher than in the floating point format.

4. The apparatus of claim 3 , wherein a numerical range which can be represented in the floating point format comprises at least 95% of a numerical range which can be represented in the integer format.

5. The apparatus of claim 1 , wherein

the data representing the data value in the floating point format comprises an in-phase component and a quadrature component; and

the first data converter circuit is configured to provide the data representing the data value in the floating point format using one common exponent for the in-phase component and the quadrature component.

6. The apparatus of claim 1 , wherein the first data converter circuit is configured to

generate a differential value corresponding to a difference between the data value in the integer format and a preceding data value in the integer format;

convert the differential value from the integer format to the floating point format; and

provide data representing the differential value in the floating point format to the digital interface.

7. The apparatus of claim 1 , wherein the second part of the radio frequency receiver comprises at least one sample rate converter circuit configured to convert a sample rate related to the signal depending on the received radio frequency signal to a sample rate depending on a sample rate of the baseband processing circuit.

8. The apparatus of claim 1 , wherein the second part of the radio frequency receiver comprises at least one gain unit configured to modify an amplitude of the data converted from the floating point format to the integer format using a gain factor.

9. The apparatus of claim 8 , wherein

the first part of the receiver comprises a first signal information circuit configured to determine a first signal strength related to the signal depending on the received radio frequency signal and/or analog gain information related to the received radio frequency signal;

the second part of the receiver comprises a second signal information circuit configured to determine a second signal strength related to the signal depending on the received radio frequency signal; and

the second part of the receiver comprises a gain control circuit which is configured to determine the gain factor based on the first signal strength and/or the analog gain information and the second signal strength.

10. The apparatus of claim 1 , wherein the second part of the radio frequency receiver comprises at least one gain circuit configured to modify an amplitude of the data representing the data value in the floating point format using a gain factor.

11. The apparatus of claim 10 , wherein

the first part of the receiver comprises a first signal information circuit configured to determine a first signal strength related to the signal depending on the received radio frequency signal and/or analog gain information related to the received radio frequency signal; and

the second part of the receiver comprises a gain control circuit which is configured to determine the gain factor based on the first signal strength and/or the analog gain information and signal information provided by the baseband processing circuit.

12. The apparatus of claim 10 , wherein the second data converter circuit is configured to convert the data representing the data value in the floating point format modified by the gain circuit.

13. The apparatus of claim 1 , wherein the second semiconductor circuit is provided in a second design node smaller than a first design node in which the first semiconductor circuit is provided.

14. The apparatus of claim 1 , wherein the data representing the data value in the floating point format comprises a radius component in the floating point format and a phase component in the integer format.

15. A method for processing a signal depending on a received radio frequency signal, comprising:

converting a data value of the signal depending on the received radio frequency signal from a integer format to a floating point format in a first part of a radio frequency receiver included in a first semiconductor circuit using a first data converter circuit;

providing data representing the data value in the floating point format to a digital interface circuit;

transmitting via the digital interface the data representing the data value in the floating point format from the first semiconductor circuit to a second semiconductor circuit including a second part of the radio frequency receiver; and

converting the data representing the data value in the floating point format to the integer format in the second semiconductor circuit using a second data converter circuit,

wherein a most significant bit of a mantissa of the data representing the data value in the floating point format is not provided to the digital interface if the exponent of the data representing the data value in the floating point format is different from a lowest possible exponent in the floating point format.

16. The method of claim 15 , wherein a number of bits used to represent the data value in the integer format is higher than in the floating point format.

17. The method of claim 16 , wherein a numerical range which can be represented in the floating point format comprises at least 95% of a numerical range which can be represented in the integer format.

18. The method of claim 15 , wherein

the data representing the data value in the floating point format comprises an in-phase component and a quadrature component; and

the data representing the data value in the floating point format are provided using one common exponent for the in-phase component and the quadrature component.

19. The method of claim 15 , wherein the data representing the data value in the floating point format comprises a radius component in the floating point format and a phase component in the integer format.

20. A non-transitory computer readable storage medium having stored thereon a program having a program code comprising executable instructions for performing the method of claim 15 , when the program is executed on a computer or processor.