Polar modulator and wireless communication apparatus using the same
First Claim
1. A polar modulator, comprising:
- a power amplification section;
a phase modulation section for generating a first modulated signal including phase information;
an amplitude signal control section for generating a second modulated signal including amplitude information;
a waveform shaping section for, when an amplitude of the second modulated signal is larger than a predetermined regulated value, generating a waveform-shaped modulated signal obtained as a result of shaping a waveform of the second modulated signal, such that the amplitude of a portion of the second modulated signal which exceeds the predetermined regulated value becomes equal to or smaller than the predetermined regulated value;
a voltage control section for outputting a supply voltage; and
an amplitude modulated voltage supply section for amplifying the waveform-shaped modulated signal using a transistor based on the supply voltage which is output from the voltage control section and for supplying the amplified signal to the power amplification section as an amplitude modulated voltage;
wherein;
the power amplification section amplifies the first modulated signal based on the amplitude modulated voltage, and thus outputs a third modulated signal obtained as a result of modulating an amplitude of the first modulated signal; and
the waveform shaping section adjusts the predetermined regulated value in accordance with a factor for changing a distorted power generated by the power amplification section, such that an adjacent channel leakage power generated in the power amplification section becomes equal to or smaller than a first predetermined value, or such that a power at a receiving band becomes equal to or smaller than a second predetermined value.
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Accused Products
Abstract
A phase modulation section (101) generates a first modulated signal including phase information. An amplitude signal control section (103) generates a second modulated signal including amplitude information. A waveform shaping section (104), when an amplitude of the second modulated signal is larger than a regulated value generates a waveform-shaped modulated signal. An amplitude modulated voltage supply section (105) amplifies the waveform-shaped modulated signal based on the supply voltage from a voltage control section (106) and supplies the amplified signal to a power amplification section (102). The power amplification section (102) amplifies the first modulated signal based on the amplitude modulated voltage, and outputs the resultant signal. The waveform shaping section (104) adjusts the regulated value in accordance with a factor for changing a distorted power generated by the power amplification section (102), such that an ACP generated by the power amplification section (102) becomes a first predetermined value or smaller.
21 Citations
31 Claims
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1. A polar modulator, comprising:
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a power amplification section; a phase modulation section for generating a first modulated signal including phase information; an amplitude signal control section for generating a second modulated signal including amplitude information; a waveform shaping section for, when an amplitude of the second modulated signal is larger than a predetermined regulated value, generating a waveform-shaped modulated signal obtained as a result of shaping a waveform of the second modulated signal, such that the amplitude of a portion of the second modulated signal which exceeds the predetermined regulated value becomes equal to or smaller than the predetermined regulated value; a voltage control section for outputting a supply voltage; and an amplitude modulated voltage supply section for amplifying the waveform-shaped modulated signal using a transistor based on the supply voltage which is output from the voltage control section and for supplying the amplified signal to the power amplification section as an amplitude modulated voltage; wherein; the power amplification section amplifies the first modulated signal based on the amplitude modulated voltage, and thus outputs a third modulated signal obtained as a result of modulating an amplitude of the first modulated signal; and the waveform shaping section adjusts the predetermined regulated value in accordance with a factor for changing a distorted power generated by the power amplification section, such that an adjacent channel leakage power generated in the power amplification section becomes equal to or smaller than a first predetermined value, or such that a power at a receiving band becomes equal to or smaller than a second predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A polar modulator, comprising:
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a power amplification section; a phase modulation section for generating a first modulated signal including phase information; an amplitude signal control section for generating a second modulated signal including amplitude information; a voltage control section for outputting a supply voltage; and an amplitude modulated voltage supply section for amplifying the second modulated signal using a transistor based on the supply voltage which is output from the voltage control section and for supplying the amplified signal to the power amplification section as an amplitude modulated voltage; wherein; the power amplification section amplifies the first modulated signal based on the amplitude modulated voltage, and thus outputs a third modulated signal obtained as a result of modulating an amplitude of the first modulated signal; and the voltage control section supplies a voltage, obtained based on a maximum value of the amplitude modulated voltage which is output from the transistor, to the amplitude modulated voltage supply section as the supply voltage. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A polar modulator, comprising:
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a power amplification section; a phase modulation section for generating a first modulated signal including phase information; an amplitude signal control section for generating a second modulated signal including amplitude information; a voltage control section for outputting a supply voltage; and an amplitude modulated voltage supply section for amplifying the second modulated signal using a transistor based on the supply voltage which is output from the voltage control section and for supplying the amplified signal to the power amplification section as an amplitude modulated voltage; wherein; the power amplification section amplifies the first modulated signal based on the amplitude modulated voltage, and thus outputs a third modulated signal obtained as a result of modulating an amplitude of the first modulated signal; and the voltage control section supplies the supply voltage, at which the transistor is operated in a constant current region, to the amplitude modulated voltage supply section. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. A wireless communication apparatus using a battery as a power supply, comprising:
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a baseband section for generating and processing a baseband signal; a transmission section for converting the baseband signal generated by the baseband section into a transmission signal; an antenna section for receiving a receiving signal; a receiving section for converting the receiving signal into a baseband signal and inputting the baseband signal to the baseband section; and a common section for transferring the transmission signal to the antenna section and transferring the receiving signal to the receiving section; wherein; the transmission section includes a polar modulator for converting the baseband signal into the transmission signal; and the polar modulator comprises; a power amplification section; a phase modulation section for generating a first modulated signal including phase information from the baseband signal; an amplitude signal control section for generating a second modulated signal including amplitude information from the baseband signal; a waveform shaping section for, when an amplitude of the second modulated signal is larger than a predetermined regulated value, generating a waveform-shaped modulated signal obtained as a result of shaping a waveform of the second modulated signal, such that the amplitude of a portion of the second modulated signal which exceeds the predetermined regulated value becomes equal to or smaller than the predetermined regulated value; a voltage control section for outputting a supply voltage; and an amplitude modulated voltage supply section for amplifying the waveform-shaped modulated signal using a transistor based on the supply voltage which is output from the voltage control section and for supplying the amplified signal to the power amplification section as an amplitude modulated voltage; wherein; the power amplification section amplifies the first modulated signal based on the amplitude modulated voltage, and thus outputs a third modulated signal obtained as a result of modulating an amplitude of the first modulated signal; and the waveform shaping section adjusts the predetermined regulated value in accordance with a factor for changing a distorted power generated by the power amplification section, such that an adjacent channel leakage power generated in the power amplification section becomes equal to or smaller than a first predetermined value, or such that a power at a receiving band becomes equal to or smaller than a second predetermined value.
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30. A wireless communication apparatus using a battery as a power supply, comprising:
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a baseband section for generating and processing a baseband signal; a transmission section for converting the baseband signal generated by the baseband section into a transmission signal; an antenna section for receiving a receiving signal; a receiving section for converting the receiving signal into a baseband signal and inputting the baseband signal to the baseband section; and a common section for transferring the transmission signal to the antenna section and transferring the receiving signal to the receiving section; wherein; the transmission section includes a polar modulator for converting the baseband signal into the transmission signal; and the polar modulator comprises; a power amplification section; a phase modulation section for generating a first modulated signal including phase information from the baseband signal; an amplitude signal control section for generating a second modulated signal including amplitude information from the baseband signal; a voltage control section for outputting a supply voltage; and an amplitude modulated voltage supply section for amplifying the second modulated signal using a transistor based on the supply voltage which is output from the voltage control section and for supplying the amplified signal to the power amplification section as an amplitude modulated voltage; wherein; the power amplification section amplifies the first modulated signal based on the amplitude modulated voltage, and thus outputs a third modulated signal obtained as a result of modulating an amplitude of the first modulated signal; and the voltage control section supplies a voltage, obtained based on a maximum value of the amplitude modulated voltage which is output from the transistor, to the amplitude modulated voltage supply section as the supply voltage.
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31. A wireless communication apparatus using a battery as a power supply, comprising:
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a baseband section for generating and processing a baseband signal; a transmission section for converting the baseband signal generated by the baseband section into a transmission signal; an antenna section for receiving a receiving signal; a receiving section for converting the receiving signal into a baseband signal and inputting the baseband signal to the baseband section; and a common section for transferring the transmission signal to the antenna section and transferring the receiving signal to the receiving section; wherein; the transmission section includes a polar modulator for converting the baseband signal into the transmission signal; and the polar modulator comprises; a power amplification section; a phase modulation section for generating a first modulated signal including phase information from the baseband signal; an amplitude signal control section for generating a second modulated signal including amplitude information from the baseband signal; a voltage control section for outputting a supply voltage; and an amplitude modulated voltage supply section for amplifying the second modulated signal using a transistor based on the supply voltage which is output from the voltage control section and for supplying the amplified signal to the power amplification section as an amplitude modulated voltage; wherein; the power amplification section amplifies the first modulated signal based on the amplitude modulated voltage, and thus outputs a third modulated signal obtained as a result of modulating an amplitude of the first modulated signal; and the voltage control section supplies the supply voltage, at which the transistor is operated in a constant current region, to the amplitude modulated voltage supply section.
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Specification