Coding system for minimizing digital data bandwidth
AssigneeDigital Compression Technology
InventorsElliot L. Gruenberg, Patrick Antaki, Dhadesugoor Vaman, David N. Judelson
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Abstract
A digital compression system including a superresonant filter, which adds samples of a digital data signal at a frequency to previous samples. The added samples are parts of sine or cosine waves, not the sum of the waves. The output signal is actually the summation of the samples. The samples are made during at most a single period. The disclosed superresonant filter has a settling time significantly faster than prior art narrow band filters. Prior art narrow band filters passing approximately 1 Hz require approximately 1 second to settle. The disclosed superresonant filter passing 1 Hz will settle in approximately 1 microsecond.
Claims14
A method of increasing digital data throughput of a channel comprising:
- inputting a digital data signal at a frequency;
- sampling the digital data signal at a fraction of the frequency;
- and
- establishing a digital feedback loop for deriving a phase shift for each sample during each repetition and accumulating the phase shift of subsequent samples with previous samples during at most a single period of the frequency.
An apparatus for increasing digital data throughput of a channel comprising:
- an input for inputting a digital data signal at a frequency;
- a sampler for sampling the digital data signal at a fraction of the frequency;
- and
- an accumulator for accumulating phase shift of the samples with multiple iterations during at most a single period of the frequency.
A method of increasing digital data throughput of a channel comprising:
- inputting a digital data signal at a frequency;
- sampling the digital data signal at a fraction of the frequency;
- and
- accumulating phase shift of the samples with multiple iterations during at most a single period of the frequency.
A transmission system for reduced energy transmission comprising:
- means for simultaneously encoding a first group of parallel binary bits into a voltage amplitude signal having a first phase,
- a superressonant filter having a local oscillator operating in phase with the voltage amplitude signal, the superressonant filter receiving the voltage amplitude signal and accumulating phase shift of samples with multiple iterations during at most a single period of a frequency and outputting a data signal.
A superressonant filter comprising:
- an adder for adding a voltage amplitude signal with a feedback signal;
- a squaring circuit for squaring the output of the adder;
- a first multiplier multiplying the adder output with an output of the local oscillator;
- a sign extracter to extract the sign of the first multiplier output;
- a square root circuit for taking the square root of the first multiplier output;
- a second multiplier for multiplying the output of the square root circuit and the output of the sign extractor;
- and
- a delay circuit for delaying the output of the second multiplier to produce the feedback signal.
A system for increasing digital data throughput of a channel comprising:
- input means for inputting a digital data signal at a frequency;
- sampling means for sampling the digital data signal at a fraction of the frequency;
- feedback means for deriving a phase shift for each sample during each repetition and adding subsequent samples to a summation of previous samples during at most a single period of the frequency.
A method improving signal to noise ratio and bit error rate using compressed highly correlated noise in adjacent close frequency channel to cancel noise in signal carrying channel, comprising:
- inputting a digital data signal at a first frequency;
- sampling the digital data signal at a fraction of the first frequency;
- accumulating a phase shift of the samples with multiple iterations during at most a single period of the frequency;
- sampling the digital data signal at a fraction of a second frequency;
- and
- accumulating phase shift of the samples with multiple iterations during at most a single period of the second frequency;
- and
- subtracting the accumulated samples of the second frequency from the samples of the first frequency.
An apparatus for increasing digital data throughput of a channel comprising:
- an input for inputting a digital data signal at a frequency;
- a sampler for sampling the digital data signal at a fraction of the frequency;
- an accumulator for accumulating phase shift of the samples with multiple iterations during at most a single period of the frequency;
- and
- means for removing out of band signal.
Dependencies are inferred from the claim text.