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US 5,966,414 AGranted
System and method for processing signals to determine their stochastic properties
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorFrancis J. O'Brien, Jr.
Life of this patent
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Abstract
A signal processing system processes a digital signal, generated in respo to an analog signal which includes a noise component and possibly also an information component. An information processing sub-system receives said digital signal and processes it to extract the information component. A noise likelihood determination sub-system receives the digital signal and generates a random noise assessment that the digital signal comprises solely random noise, and controls the operation of the information processing sub-system in response to the random noise assessment.
Claims10
A signal processing system comprising:
- transducer means for receiving an analog signal, the analog signal including a noise component and possibly also an information component, and generating in response a digital signal which is represented by a plurality of sample points distributed over a selected region;
- a noise likelihood determination sub-system for receiving said digital signal and for generating a random noise assessment that the digital signal comprises solely random noise, said noise likelihood determination subsystem generating the random noise assessment in response to a nearest-neighbor distance deviation assessment generated in response to distances between nearest-neighbor ones of the sample points in comparison with distances between a like number of nearest-neighbor reference points that are random distributed;
- and
- an information processing sub-system for receiving said digital signal and for processing it to extract said information component if the noise likelihood determination subsystem determines that the random noise assessment indicates that the digital signal does not comprise solely random noise.
1 more element
A signal processing system comprising:
- transducer means for receiving an analog signal, the analog signal including a noise component and possibly also an information component, and generating in response a digital signal;
- a noise likelihood determination sub-system for receiving said digital signal and for generating a random noise assessment that the digital signal comprises solely random noise, said noise likelihood determination sub-system includes randomness statistic generating means for generating a randomness statistic in response to an interpoint spacing parameter statistic;
- and
- an information processing sub-system for receiving said digital signal for processing it to extract said information component if the noise likelihood determination subsystem determines that the random noise assessment indicates that the digital signal does not comprise solely random noise, the noise likelihood determination sub-system generating the random noise assessment in response to the randomness statistic.
1 more element
A signal processing method comprising the steps of:
- receiving an analog signal including a noise component and possibly also an information component, and generating in response a digital signal which is represented by a plurality of sample points distributed over a selected region;
- a noise likelihood determination step of generating in response to said digital signal a random noise assessment that the digital signal comprises solely random noise, said noise likelihood determination step including the step of generating the random noise assessment in response to a nearest-neighbor distance deviation assessment generated in response to distances between nearest-neighbor ones of the sample points in comparison with distances between a like number of nearest-neighbor reference points that are randomly distributed;
- and
- an information processing step of receiving and processing said digital signal to extract said information component if it is determined during the noise likelihood determination step that the random noise assessment indicates that the digital signal does not comprise solely random noise.
1 more element
A signal processing method comprising the steps of:
- receiving an analog signal including a noise component and possibly also an information component, and generating in response a digital signal;
- a noise likelihood determination step of generating in response to said digital signal a random noise assessment that the digital signal comprises solely random noise, said noise likelihood determination step including the steps of generating a randomness statistic in response to an interpoint spacing parameter statistic, and generating the random noise assessment in response to the randomness statistic;
- and
- an information processing step of receiving and processing said digital signal to extract said information component if it is determined during the noise likelihood determination step that the random noise assessment indicates that the digital signal does not comprise solely random noise.
1 more element
Dependencies are inferred from the claim text.