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US 2016/0336973 A1Published application
Radio apparatus
AssigneeHitachi, Ltd.
InventorsMasahiro AONO, Ken TAKEI
Life of this patent
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Abstract
A radio apparatus includes a baseband signal generator to generate a baseband signal; a sine wave substituting device to substitute a transition part of the baseband signal in which a logic level switches from “0” to “1” or “1” to “0” with a sine wave represented with multi-values; and a delta sigma modulator to modulate the signal represented in the multi-values into a binary signal.
Claims19
A radio apparatus comprising:
- a baseband signal generator to generate a baseband signal;
- a sine wave substituting device to substitute a transition part of the baseband signal having a logic level switching from “0” to “1” or “1” to “0” with a multivalue signal of a sine wave;
- and
- a delta sigma modulator to modulate the multivalue signal into a binary signal.
1 more element
A radio apparatus comprising:
- a baseband signal generator to generate a baseband signal;
- a transition part substituting device to substitute a transition part of the baseband signal having a logic level switching from “0” to “1” or “1” to “0” with a multivalue sigmoid function;
- a delta sigma modulator to modulate the multivalue signal into a binary signal;
- a carrier wave generator to generate a carrier wave;
- and
- a carrier wave modulator to modulate the carrier wave with the output signal of the delta sigma modulator.
3 more elements
A radio apparatus comprising:
- a baseband signal generator to generate a baseband signal;
- a sine wave substituting device to substitute a transition part of the baseband signal in which a logic level switches from “0” to “1” or “1” to “0” with a multivalue signal of sine wave;
- a carrier wave modulator to generate a carrier wave and modulate the carrier wave with the baseband signal outputted by the sine wave substituting device;
- and
- a delta sigma modulator to modulate the multivalue signal into a binary signal.
2 more elements
A radio apparatus comprising:
- a baseband signal generator to generate a baseband signal;
- and
- a transmission data generator including a transmission data table to hold data previously calculated to convert the baseband signal to the transmission signal.
Dependencies are inferred from the claim text.