Polar Modulator and Method for Generating a Polar-Modulated Signal

A mobile telephone, comprising:

• a polar modulator for generating a polar-modulated signal based on amplitude information and phase information, comprising:
• a phase-locked loop which is implemented to enable a setting of a frequency depending on a control value to acquire a phase-locked loop output signal;
• a modulator which is implemented to combine an amplitude modulation signal derived from the amplitude information with the phase-locked loop output signal to generate the polar-modulated signal;
• and
• a control value generator which is implemented to high-pass filter an amplitude signal derived from the amplitude information to acquire a high-pass filtered amplitude signal;
• wherein the control value generator is implemented to combine the high-pass filtered amplitude signal with a phase signal based on the phase information to generate a control value signal representing the control value, for generating a polar-modulated signal;
• a power amplifier which is implemented to amplify the polar-modulated signal;
• wherein the polar modulator and the power amplifier are arranged such that a feedback exists from the power amplifier to the phase-locked loop.

A method for generating a polar-modulated signal based on amplitude information and phase information, the method comprising:

• high-pass filtering an amplitude signal derived from the amplitude information to acquire a high-pass filtered amplitude signal;
• combining the high-pass filtered amplitude signal with a phase signal based on the phase information to acquire a control value signal describing a control value;
• providing an output signal using a phase regulation, wherein a frequency of the output signal is set depending on the control value;
• and
• combining an amplitude modulation signal derived from the amplitude information with the output signal of the phase-locked loop into the polar-modulated signal.

A computer program comprising a program code for executing the method for generating a polar-modulated signal based on amplitude information and phase information, the method comprising:

• high-pass filtering an amplitude signal derived from the amplitude information to acquire a high-pass filtered amplitude signal;
• combining the high-pass filtered amplitude signal with a phase signal based on the phase information to acquire a control value signal describing a control value;
• providing an output signal using a phase regulation, wherein a frequency of the output signal is set depending on the control value;
• and
• combining an amplitude modulation signal derived from the amplitude information with the output signal of the phase-locked loop into the polar-modulated signal, when the computer program is executed on a computer.

A polar modulator for generating a polar-modulated signal based on amplitude information and phase information, comprising:

• a phase-locked loop which is implemented to enable a setting of a frequency depending on a control value to acquire a phase-locked loop output signal;
• a modulator which is implemented to combine an amplitude modulation signal derived from the amplitude information with the phase-locked loop output signal to generate the polar-modulated signal;
• and
• a control value generator which is implemented to generate the control value based on the amplitude information and the phase information, wherein the control value generator is implemented to additively overlay a signal value derived from the amplitude information and a signal value corresponding to the phase information or a signal value derived from the phase information, to generate the control value.

A polar modulator for generating a polar-modulated signal based on amplitude information and phase information, comprising:

• a phase-locked loop which is implemented to enable the setting of a frequency depending on a control value to acquire a phase-locked loop output signal;
• a modulator which is implemented to combine an amplitude modulation signal derived from the amplitude information with the phase-locked loop output signal to generate the polar-modulated signal;
• and
• a control value generator,
• wherein the control value generator comprises an amplification, a delay and a high-pass filter;
• wherein the control value generator is implemented to amplify an amplitude signal derived from the amplitude information using the amplification, delay the same using the delay and high-pass filter the same using the high-pass filter to determine a high-pass filtered amplitude signal from the amplitude signal derived from the amplitude information;
• wherein the control value generator further comprises a differentiator and a pre-distortion filter;
• wherein the control value generator is implemented to differentiate a phase signal based on the phase information 53 using the differentiator and pre-distort the same using the pre-distortion filter to acquire a pre-distorted frequency signal from the phase signal based on the phase information to additively overlay the pre-distorted frequency signal with the high-pass filtered amplitude signal to generate a control value signal representing the control value;
• or
• wherein the control value generator is implemented to additively overlay a phase signal based on the phase information with the high-pass filtered amplitude signal to generate a combined signal to differentiate the combined signal using the differentiator and pre-distort the same using the pre-distortion filter, to generate a control value signal from the combined signal representing the control value.

A polar modulation means for generating a polar-modulated signal based on amplitude information and phase information, comprising:

• a means for high-pass filtering an amplitude signal derived from the amplitude information to acquire a high-pass filtered amplitude signal;
• a means for combining the high-pass filtered amplitude signal with a phase signal based on the phase information to acquire a control value signal describing a control value;
• a means for providing an output signal using a phase regulation, wherein a frequency of the output signal is set depending on the control value;
• and
• a means for combining an amplitude modulation signal derived from the amplitude information with the output signal of the phase-locked loop into the polar-modulated signal.