Method and an apparatus for determining a noise shaped quantized parameter contributing to the generation of an output signal

A method for generating a radio frequency signal based on a phase value as a parameter and a radius value as a further parameter, comprising:

• calculating a first estimated error within the radio frequency signal using a first quantization of the phase value and a quantization of the radius value;
• calculating a second estimated error within the radio frequency signal using a second quantization of the phase value and the quantization of the radius value;
• and
• using the quantization of the phase value resulting in a relatively lower estimated error as a noise shaped quantized phase value.

A noise shaper for determining a noise shaped quantized parameter contributing to generation of an output signal, comprising:

• an error estimation component configured to receive a parameter and a further parameter contributing to the generation of the output signal, the error estimation component comprising:
• quantization circuitry configured to calculate a first quantization of the parameter, a second quantization of the parameter, and a quantization of the further parameter;
• error calculation circuitry configured to calculate a first estimated error within the output signal using the first quantization of the parameter and the quantization of the further parameter and to calculate a second estimated error within the output signal using the second quantization of the parameter and the quantization of the further parameter;
• and
• a decision making component configured to compare the first estimated error and the second estimated error to decide on the use of the quantization of the parameter resulting in a relatively lower estimated error.

A radio frequency generator for generating a radio frequency signal based on a parameter and on a further parameter, comprising:

• an error estimation component configured to receive a parameter and a further parameter contributing to the generation of the output signal, the error estimation component comprising:
• quantization circuitry configured to calculate a first quantization of the parameter, a second quantization of the parameter, and a quantization of the further parameter;
• error calculation circuitry configured to calculate a first estimated error within the output signal using the first quantization of the parameter and the quantization of the further parameter and to calculate a second estimated error within the output signal using the second quantization of the parameter and the quantization of the further parameter;
• a decision making component configured to compare the first estimated error and the second estimated error to decide on the use of the quantization of the parameter resulting in a relatively lower estimated error as a noise shaped quantized parameter;
• and
• a signal combiner configured to combine a first signal depending on the noise shaped quantized parameter and a second signal depending on the quantization of the further parameter to provide the output signal.