Transmission arrangement and method for modulating useful signals onto a carrier frequency signal

1. A transmission arrangement for modulating useful signals onto a carrier frequency signal, having:

a frequency generator for generating the carrier frequency signal;

a first modulation path for modulating a first useful signal onto the carrier frequency signal; and

a second modulation path for modulating a second useful signal onto the carrier frequency signal;

wherein the frequency generator is common to the first and second modulation paths;

the first modulation path having a digital modulator for providing an amplitude signal and a Cartesian signal pair from the first useful signal;

the first modulation path having a first Cartesian modulator for modulating the Cartesian signal pair onto the carrier frequency signal in order to provide an intermediate signal;

and the first modulation path being configured in such a manner that the amplitude signal is modulated onto the intermediate signal in order to provide a first output signal.

2. The transmission arrangement as claimed in patent claim 1 ,

the second modulation path having a second digital modulator for providing a second amplitude signal and a second Cartesian signal pair from the second useful signal;

the second modulation path having a second Cartesian modulator for modulating the second Cartesian signal pair onto the carrier frequency signal in order to provide a second intermediate signal;

and the second modulation path being configured in such a manner that the second amplitude signal is modulated onto the second intermediate signal in order to provide a second output signal.

3. The transmission arrangement as claimed in patent claim 1 , which is arranged in a semiconductor module.

4. The transmission arrangement as claimed in patent claim 1 , the first useful signal and the second useful signal comprising the same information.

5. The transmission arrangement as claimed in patent claim 1 , the first Cartesian modulator being set up to provide an intermediate signal having a constant envelope.

6. A method for modulating useful signals onto a carrier frequency signal, comprising:

generating the carrier frequency signal, the carrier frequency common to a plurality of modulation paths;

providing an amplitude signal and a Cartesian signal pair from a first useful signal;

modulating the Cartesian signal pair onto the carrier frequency signal common to the plurality of modulation paths in order to provide an intermediate signal;

modulating the amplitude signal onto the intermediate signal in order to provide a first output signal.

7. The method as claimed in patent claim 6 , comprising:

modulating a second useful signal onto the carrier frequency signal common to the plurality of modulation paths in order to provide a second output signal.

8. The method as claimed in patent claim 6 , the first useful signal and the second useful signal comprising the same information.

9. The method as claimed in patent claim 6 , the intermediate signal having a constant envelope being provided.