Transmission apparatus and transmission method
AssigneeNEC Corporation
InventorShingo Yamanouchi
Life of this patent
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Abstract
A transmission apparatus of the present invention includes polar modulator (601) that generates a power supply modulation signal and RF signals of a plurality of carrier frequency bands to be transmitted, power amplifier (603) that amplifies the RF signals from polar modulator (601), and power supply modulator (602) that modulates the power supply terminal of power amplifier (603) by a signal obtained by amplifying the power supply modulation signal from polar modulator (601). The power supply modulation signal is set based on a function using, as an argument, the power of the RF signal of each carrier frequency band output from power amplifier (603).
Claims20
A transmission apparatus comprising:
- a polar modulator that generates a power supply modulation signal and RF (Radio Frequency) signals of a plurality of carrier frequency bands to be transmitted;
- a power amplifier that amplifies the RF signals from the polar modulator;
- and
- a power supply modulator that modulates a power supply terminal of the power amplifier by a signal obtained by amplifying the power supply modulation signal from the polar modulator,
- wherein the power supply modulation signal is set based on a function using, as an argument, the power of the RF signal of each carrier frequency band output from the power amplifier.
A transmission method implemented in a transmission apparatus that generates RF signals of a plurality of carrier frequency bands to transmit the RF signals via a power amplifier, the transmission method comprising:
- the step of detecting power of the RF signal of each carrier frequency band output from the power amplifier;
- the step of setting a power supply modulation signal based on a function using, as an argument, the detected power of the RF signal of each carrier frequency band;
- and
- the step of modulating a power supply terminal of the power amplifier by the power supply modulation signal output from a power supply modulator.
Dependencies are inferred from the claim text.