System for encoding multi-bit features into sinusoidal waveforms at selected phase angles
First Claim
1. A method, comprising:
- receiving input digital data;
creating a modulated sinusoidal waveform by modulating a sinusoidal waveform at selected phase angles within each of a plurality of periods of the sinusoidal waveform in accordance with the input digital data;
generating an encoded analog waveform using the modulated sinusoidal waveform;
wherein the modulating includes forming a first amplitude perturbation at a first phase angle of the selected phase angles wherein the first amplitude perturbation includes a first plurality of transition features and subtends a first phase angle range about the first phase angle, the first plurality of transition features being representative of a first plurality of bit values included within the input digital data.
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Abstract
A system and method for encoding multi-bit features into sinusoidal waveforms at selected phase angles. The method includes receiving input digital data and encoding the input digital data in a sinusoidal waveform by modulating the sinusoidal waveform at selected phase angles within a period of the sinusoidal waveform, thereby creating a modulated sinusoidal waveform. An encoded analog waveform is generated, using a digital-to-analog converter, from a digital representation of the modulated sinusoidal waveform. The modulating includes forming a first data notch at a first phase angle of the selected phase angles wherein the first data notch includes a first plurality of transition features and subtends a first phase angle range about the first phase angle, the first plurality of transition features being representative of a first plurality of bit values included within the input digital data.
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Citations
27 Claims
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1. A method, comprising:
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receiving input digital data; creating a modulated sinusoidal waveform by modulating a sinusoidal waveform at selected phase angles within each of a plurality of periods of the sinusoidal waveform in accordance with the input digital data; generating an encoded analog waveform using the modulated sinusoidal waveform; wherein the modulating includes forming a first amplitude perturbation at a first phase angle of the selected phase angles wherein the first amplitude perturbation includes a first plurality of transition features and subtends a first phase angle range about the first phase angle, the first plurality of transition features being representative of a first plurality of bit values included within the input digital data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system, comprising:
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an input buffer for storing input digital data; a sub-periodic modulator for encoding the input digital data in a sinusoidal waveform by modulating the sinusoidal waveform at selected phase angles within a period of the sinusoidal waveform, thereby creating a modulated sinusoidal waveform; one or more digital-to-analog converters for generating an encoded analog waveform from a representation of the modulated sinusoidal waveform; wherein the sub-periodic modulator is configured to form a first amplitude perturbation at a first phase angle of the selected phase angles wherein the first amplitude perturbation includes a first plurality of transition features and subtends a first phase angle range about the first phase angle, the first plurality of transition features being representative of a first plurality of bit values included within the input digital data. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A method, comprising:
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receiving input data; creating a modulated sinusoidal waveform having amplitude perturbations of reduced power at selected phase angles within a period of the sinusoidal waveform wherein the amplitude perturbations represent the input data and wherein a first amplitude perturbation of the amplitude perturbations includes a first plurality of transition features representative of a first plurality of values included within the input data; and generating an encoded analog waveform from a representation of the modulated sinusoidal waveform. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification