Transmission device and transmission method
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United States of America Patent
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Nov 7, 2017
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app pub date -
Dec 12, 2014
filing date -
Dec 19, 2013
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Abstract
In order to realize a power-saving power amplifier compatible with Carrier Aggregation technology using a plurality of bands, with a small size and low cost, while improving the amplitude accuracy and power efficiency, a transmission device of the present invention comprises: a modulation means that generates, from a baseband signal corresponding to each of the plurality of bands, a first and a second constant-envelope signals having different phases; a power amplification means that amplifies respective ones of the first and second constant-envelope signals generated by the modulation means; and a combining means that combines together the first and second constant-envelope signals amplified by the power amplification means and thereby generating an RF signal in which amplitude information contained in each of the baseband signals corresponding to respective ones of the plurality of bands is restored.
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