Apparatuses and methods for generating a radio frequency signal, a modulator, a controller for a modulator, and a method for controlling a modulator
First Claim
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1. An apparatus for generating a radio frequency signal, comprising:
- a modulator configured to generate the radio frequency signal based on an input signal; and
a controller configured to control the modulator to generate the radio frequency signal using polar modulation, if the input signal has a first characteristic,wherein the controller is configured to control the modulator to generate the radio frequency signal using quadrature modulation, if the input signal has a different second characteristicwherein the first characteristic indicates that a sample of the input signal is located in a first region of a constellation diagram, and wherein the second characteristic indicates that the sample is located in a different second region of the constellation diagram.
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Abstract
An apparatus for generating a radio frequency signal is provided. The apparatus includes a modulator configured to generate the radio frequency signal based on an input signal. Further, the apparatus includes a controller configured to control the modulator to generate the radio frequency signal using polar modulation, if the input signal has a first characteristic. The controller is configured to control the modulator to generate the radio frequency signal using quadrature modulation, if the input signal has a different second characteristic.
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Citations
23 Claims
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1. An apparatus for generating a radio frequency signal, comprising:
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a modulator configured to generate the radio frequency signal based on an input signal; and a controller configured to control the modulator to generate the radio frequency signal using polar modulation, if the input signal has a first characteristic, wherein the controller is configured to control the modulator to generate the radio frequency signal using quadrature modulation, if the input signal has a different second characteristic wherein the first characteristic indicates that a sample of the input signal is located in a first region of a constellation diagram, and wherein the second characteristic indicates that the sample is located in a different second region of the constellation diagram. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for generating a radio frequency signal, comprising:
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a modulator configured to generate the radio frequency signal based on a plurality of samples; and a control unit configured to control the modulator to generate the radio frequency signal using quadrature modulation for a first sequence of the samples, wherein the control unit is configured to control the modulator to generate the radio frequency signal using polar modulation for a second sequence of the samples, the second sequence of the samples directly succeeding the first sequence of the samples, wherein the control unit is configured to calculate a phase of the last sample of the first sequence, and wherein the control unit is configured to calculate a carrier frequency of the radio frequency signal for the first sequence based on the phase of the last sample of the first sequence. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method for generating a radio frequency signal, comprising:
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generating the radio frequency signal based on an input signal using a modulator; controlling the modulator to generate the radio frequency signal using polar modulation, if the input signal has a first characteristic; and controlling the modulator to generate the radio frequency signal using quadrature modulation, if the input signal has a different second characteristic, wherein the first characteristic indicates that a sample of the input signal is located in a first region of a constellation diagram, and wherein the second characteristic indicates that the sample is located in a different second region of the constellation diagram. - View Dependent Claims (17, 18, 19, 20)
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21. A method for generating a radio frequency signal, comprising:
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generating the radio frequency signal based on a plurality of samples using a modulator; controlling the modulator to generate the radio frequency signal using quadrature modulation for a first sequence of the samples; controlling the modulator to generate the radio frequency signal using polar modulation for a second sequence of the samples, the second sequence of the samples directly succeeding the first sequence of the samples; calculating a phase of the last sample of the first sequence; and calculating a carrier frequency of the radio frequency signal for the first sequence based on the phase of the last sample of the first sequence. - View Dependent Claims (22, 23)
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Specification