Single and multiple sinewave modulation and demodulation techniques, apparatus, and communications systems
First Claim
1. A method for generating a substantially sinusoidal waveform containing encoded digital data having one of a first value and a second value at selected phase angles θ
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n comprising;
generating the waveform having an amplitude Y defined by a first function at phase angles lying outside of regions said first function being Y=sin θ
,generating the waveform having an amplitude Y defined by said first function at phase angles lying inside said data regions having a range of Δ
θ
beginning at each phase angle θ
n where data of the first value is to be encoded; and
generating the waveform having an amplitude Y defined by a second function at phase angles lying inside said data regions having a range of Δ
θ
associated with each phase angle θ
n where data of the second value is to be encoded, said second function being different from Y=sin θ
.
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Accused Products
Abstract
A method for generating a substantially sinusoidal waveform containing encoded digital data having one of a first value and a second value at selected phase angles θn comprises generating the waveform having an amplitude Y defined by a first function at phase angles lying outside of regions having a range Δθ beginning at each phase angle θn, said first function being Y=sin θ; generating the waveform having an amplitude Y defined by the first function at phase angles lying inside the regions having a range of Δθ beginning at each phase angle θn where data of the first value is to be encoded; and generating the waveform having an amplitude Y defined by a second function at phase angles lying inside the regions having a range of Δθ associated with each phase angle θn where data of the second value is to be encoded, the second function being different from Y=sin θ.
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Citations
41 Claims
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1. A method for generating a substantially sinusoidal waveform containing encoded digital data having one of a first value and a second value at selected phase angles θ
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n comprising;
generating the waveform having an amplitude Y defined by a first function at phase angles lying outside of regions said first function being Y=sin θ
,generating the waveform having an amplitude Y defined by said first function at phase angles lying inside said data regions having a range of Δ
θ
beginning at each phase angle θ
n where data of the first value is to be encoded; andgenerating the waveform having an amplitude Y defined by a second function at phase angles lying inside said data regions having a range of Δ
θ
associated with each phase angle θ
n where data of the second value is to be encoded, said second function being different from Y=sin θ
. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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n comprising;
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8. A method for generating a substantially sinusoidal waveform containing encoded digital data having one of a first value and a second value at selected phase angles θ
-
n comprising;
generating the waveform having an amplitude Y defined by a first function at phase angles lying outside of data regions said first function being Y=sin θ
,generating the waveform having an amplitude Y defined by said first function at phase angles lying inside said data regions having a range of Δ
θ
beginning at each phase angle θ
n where data of the first value is to be encoded; andgenerating the waveform having an amplitude Y defined by a second function at phase angles lying inside said data regions having a range of Δ
θ
associated with each phase angle θ
n where data of the second value is to be encoded, said second function being one of Y=sin θ
n and Y=sin θ
(n+Δ
θ
). - View Dependent Claims (9, 10, 11, 12, 13, 14)
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n comprising;
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15. A method for generating a plurality of substantially sinusoidal waveforms each having a different frequency and containing encoded digital data having one of a first value and a second value at selected phase angles θ
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n comprising;
generating each waveform having an amplitude Y defined by a first function at phase angles lying outside of data regions said first function being Y=sin θ
,generating each waveform having an amplitude Y defined by said first function at phase angles lying inside said data regions having a range of Δ
θ
beginning at each phase angle θ
n where data of the first value is to be encoded; andgenerating each waveform having an amplitude Y defined by a second function at phase angles lying inside said data regions having a range of Δ
θ
associated with each phase angle θ
n where data of the second value is to be encoded, said second function being different from Y=sin θ
. - View Dependent Claims (16, 17, 18, 19, 20)
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n comprising;
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21. A method for generating a plurality of substantially sinusoidal waveforms each having a different frequency and containing encoded digital data having one of a first value and a second value at selected phase angles θ
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n comprising;
generating each waveform having an amplitude Y defined by a first function at phase angles lying outside of data regions said first function being Y=sin θ
,generating each waveform having an amplitude Y defined by said first function at phase angles lying inside said data regions having a range of Δ
θ
beginning at each phase angle θ
n where data of the first value is to be encoded; andgenerating each waveform having an amplitude Y defined by a second function at phase angles lying inside said data regions having a range of Δ
θ
associated with each phase angle θ
n where data of the second value is to be encoded, said second function being one of Y=sin θ
n and Y=sin θ
(n+Δ
θ
). - View Dependent Claims (22, 23, 24, 25, 26)
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n comprising;
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27. A method for decoding information from a substantially sinusoidal waveform containing encoded digital data at selected phase angles θ
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n, the waveform having an amplitude Y=sin θ
at phase angles lying outside of regions having a range of Δ
θ
beginning at each phase angle θ
n, the waveform having an amplitude Y=sin θ
at phase angles lying inside the data regions where data of the first value is to be encoded, the waveform having an amplitude Y defined by a different from Y=sin θ
at phase angles lying inside the data regions having a range of Δ
θ
associated with each phase angle θ
n where data of the second value is to be encoded, comprising;receiving the sinusoidal waveform containing encoded digital data; generating a reference sinusoidal waveform from said substantially sinusoidal waveform containing encoded digital data, said reference sinusoidal waveform having a constant phase relationship with said sinusoidal waveform containing encoded digital data; mixing said reference sinusoidal waveform and said substantially sinusoidal waveform containing encoded digital data in a balanced mixer; and extracting said encoded digital data from said balanced mixer.
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n, the waveform having an amplitude Y=sin θ
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28. Apparatus for generating a substantially sinusoidal waveform containing encoded digital data having one of a first value and a second value at selected phase angles θ
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n comprising;
means for generating the waveform having an amplitude Y defined by a first function at phase angles lying outside of data regions said first function being Y=sin θ
,means for generating the waveform having an amplitude Y defined by said first function at phase angles lying inside said data regions having a range of Δ
θ
beginning at each phase angle θ
n where data of the first value is to be encoded; andmeans for generating the waveform having an amplitude Y defined by a second function at phase angles lying inside said data regions having a range of Δ
θ
associated with each phase angle θ
n where data of the second value is to be encoded, said second function being different from Y=sin θ
. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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n comprising;
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35. Apparatus for generating a substantially sinusoidal waveform containing encoded digital data having one of a first value and a second value at selected phase angles θ
-
n comprising;
means for generating the waveform having an amplitude Y defined by a first function at phase angles lying outside of data regions said first function being Y=sin θ
,means for generating the waveform having an amplitude Y defined by said first function at phase angles lying inside said data regions having a range of Δ
θ
beginning at each phase angle θ
n where data of the first value is to be encoded; andmeans for generating the waveform having an amplitude Y defined by a second function at phase angles lying inside said data regions having a range of Δ
θ
associated with each phase angle θ
n where data of the second value is to be encoded, said second function being one of Y=sin θ
n and Y=sin θ
(n+Δ
θ
). - View Dependent Claims (36, 37, 38, 39, 40, 41)
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n comprising;
Specification