Coaxial cable communications systems and methods employing single and multiple sinewave modulation and demodulation techniques
First Claim
1. A communications system comprising:
- a coaxial cable communications medium;
a first station including;
an encoder for generating at least one 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 data regions, the waveform having an amplitude Y=sin θ
at phase angles lying inside the 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, the waveform having an amplitude Y defined by a function different from Y=sin θ
at phase angles lying inside the data regions having a range of Δ
θ
beginning at each phase angle θ
n where data of the second value is to be encoded;
a transmitter coupled to the coaxial cable communications medium for transmitting the at least one waveform containing encoded digital data through the coaxial cable communications medium;
a second station including;
a receiver coupled to the coaxial cable communications medium for receiving the at least one waveform containing encoded digital data through the coaxial cable communications medium from the first station; and
a decoder for extracting the digital data from the at least one waveform containing encoded digital data.
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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
31 Claims
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1. A communications system comprising:
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a coaxial cable communications medium; a first station including; an encoder for generating at least one 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 data regions, the waveform having an amplitude Y=sin θ
at phase angles lying inside the 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, the waveform having an amplitude Y defined by a function different from Y=sin θ
at phase angles lying inside the data regions having a range of Δ
θ
beginning at each phase angle θ
n where data of the second value is to be encoded;a transmitter coupled to the coaxial cable communications medium for transmitting the at least one waveform containing encoded digital data through the coaxial cable communications medium; a second station including; a receiver coupled to the coaxial cable communications medium for receiving the at least one waveform containing encoded digital data through the coaxial cable communications medium from the first station; and a decoder for extracting the digital data from the at least one waveform containing encoded digital data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A communications system comprising:
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a coaxial cable communications medium; a first station; a second station; wherein the first and second stations each include; an encoder for generating at least one 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 data regions, the waveform having an amplitude Y=sin θ
at phase angles lying inside the 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, the waveform having an amplitude Y defined by a function different from 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 second value is to be encoded;a transmitter coupled to the coaxial cable communications medium for transmitting the at least one waveform containing encoded digital data through the coaxial cable communications medium; a receiver coupled to the coaxial cable communications medium for receiving the at least one waveform containing encoded digital data through the coaxial cable communications medium; and a decoder for extracting the digital data from the at least one waveform containing encoded digital data. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A communications system comprising:
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a coaxial cable communications medium; a first station including; a plurality of encoders for generating a plurality of 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 data regions, the first function being Y=sin θ
, generating each waveform having an amplitude Y defined by the first function at phase angles lying inside the 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 each waveform having an amplitude Y defined by a second function at phase angles lying inside the data regions having a range of Δ
θ
beginning at each phase angle θ
n where data of the second value is to be encoded, the second function being different from Y=sin θ
;a transmitter coupled to the coaxial cable communications medium for transmitting the plurality of waveforms containing encoded digital data through the coaxial cable communications medium; a second station including; a receiver coupled to the coaxial cable communications medium for receiving the plurality of waveforms containing encoded digital data through the coaxial cable communications medium from the first station; and a plurality of decoders for extracting the digital data from the plurality of waveform containing encoded digital data. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification