Single and multiple sinewave modulation and demodulation techniques, apparatus, and communications systems
First Claim
Patent Images
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 having a range of Δ
θ
beginning at each phase angle θ
n, 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 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 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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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.
18 Citations
80 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
-
n comprising;
generating the waveform having an amplitude Y defined by a first function at phase angles lying outside of regions having a range of Δ
θ
beginning at each phase angle θ
n, 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 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 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)
-
n comprising;
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8. A method for generating a substantially sinusoidal waveform 1 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 regions having a range of Δ
θ
beginning at each phase angle θ
n, 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 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 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)
-
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 regions having a range of Δ
θ
beginning at each phase angle θ
n, 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 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 each waveform having an amplitude Y defined by a second function at phase angles lying inside said 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)
-
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
-
n comprising;
generating each waveform having an amplitude Y defined by a first function at phase angles lying outside of regions having a range of Δ
θ
beginning at each phase angle θ
n, 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 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 each waveform having an amplitude Y defined by a second function at phase angles lying inside said 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)
-
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 regions having a range of Δ
θ
beginning at each phase angle On 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 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. 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 regions having a range of Δ
θ
beginning at each phase angle θ
n 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 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;
digitizing said sinusoidal waveform containing encoded digital data;
generating a digital reference sinusoidal waveform having a constant phase relationship with said sinusoidal waveform containing encoded digital data; and
performing inverse fast fourier transform digital signal processing on said reference sinusoidal waveform and said substantially sinusoidal waveform containing encoded digital data.
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n, the waveform having an amplitude Y=sin θ
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29. A communications system for communicating in a communications medium and comprising:
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a first station including;
an encoder for generating at least one substantially sinusoidal waveform containing encoded digital data at selected phase angles θ
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 regions having a range of Δ
θ
beginning at each phase angle θ
n 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 regions having a range of Δ
θ
associated with each phase angle θ
n where data of the second value is to be encoded; and
a transmitter for transmitting said at least one substantially sinusoidal waveform containing encoded digital data through said medium;
a second station coupled to said first station through said communications medium and including;
a receiver for receiving said at least one substantially sinusoidal waveform containing encoded digital data through said medium from said first station; and
a decoder for extracting said digital data from said at least one substantially sinusoidal waveform containing encoded digital data. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. A communications system for communicating in a communications medium and comprising:
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a first station;
a second station coupled to said first station through said communications medium;
wherein said first and second stations each include;
an encoder for generating at least one substantially sinusoidal waveform containing encoded digital data at selected phase angles θ
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 regions having a range of Δ
θ
beginning at each phase angle θ
n 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 regions having a range of Δ
θ
associated with each phase angle θ
n where data of the second value is to be encoded;
a transmitter for transmitting said at least one substantially sinusoidal waveform containing encoded digital data through said medium;
a receiver for receiving said at least one substantially sinusoidal waveform containing encoded digital data through said medium; and
a decoder for extracting said digital data from said at least one substantially sinusoidal waveform containing encoded digital data. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66)
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67. 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 regions having a range of Δ
θ
beginning at each phase angle θ
n, 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 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
means for generating the waveform having an amplitude Y defined by a second function at phase angles lying inside said 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 (68, 69, 70, 71, 72, 73)
-
n comprising;
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74. 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;
generating the waveform having an amplitude Y defined by a first function at phase angles lying outside of regions having a range of Δ
θ
beginning at each phase angle θ
n, 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 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 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 (75, 76, 77, 78, 79, 80)
-
n comprising;
Specification
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Current AssigneeData Flow Technologies Incorporated
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Original AssigneeData Flow Technologies Incorporated
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InventorsBrown, Forrest J., Loar, David W., D'Alessandro, Kenneth, Pownell, Charles V., Kunzel, Ronald E.
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current375/259
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CPC Class CodesH04L 27/00 Modulated-carrier systemsH04L 27/2602 Signal structure
