Patent US3863058A successfully refreshed from Google Patents.
US3863058A
Expired / Lapsed
US
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Apparatus for digital correlation
Assignee: Western Atlas International Inc
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Filing: 1972-01-17
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Granted: 1975-01-28
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Expires: 1992-01-17
Abstract
Abstract A method and apparatus for serially correlating two discrete time series wherein the two series to be correlated are converted to floating point form to a base such as 2. The series are correlated using the exponents only. The two time series to be correlated are correlated by adding the corresponding exponents of the numbers which in their full form would have had to have been multiplied. The sums are segregated into two groups, those in which the corresponding numbers from the two series have the same sign, and those in which the numbers have opposite signs. The sums for each group are separately exponentiated to the same base as was used in forming the floating-point numbers. All exponentiated sums from the two groups are separately accumulated. The accumulated sums are algebraically added to form a final sum.
Inventors
- 👤 Carl H Savit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:32
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/28; G01V1/36; G06; G06F; G06F17/00; G06F17/10; G06F17/15
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
A compact digital apparatus for determining the degree of association between two time series of digital quantitites expressed in floating-point form wherein each component value of said two time series consists of a sign, an exponent, and a mantissa comprising: means to remove the signs and exponents from the component values of said two time series; and correlator means coupled to said removing means for using said signs and exponents to correlate said two time series, said correlator means including an adder means for adding the absolute values of said exponents in pairs, one of said pairs of exponents being selected from one time series and the other of said pairs being selected from the other time series.
Claim 2
Dependent Claim
118 words
A compact digital apparatus for determining the degree of association between two time series of digital quantitites expressed in floating-point form wherein each component value of said two time series consists of a sign, an exponent, and a mantissa comprising: means to remove the signs and exponents from the component values of said two time series; and correlator means coupled to said removing means for using said signs and exponents to correlate said two time series, said correlator means including an adder means for adding the absolute values of said exponents in pairs, one of said pairs of exponents being selected from one time series and the other of said pairs being selected from the other time series.
Claim 3
Dependent Claim
94 words
The apparatus of claim 1, wherein said correlator means includes: comparator means coupled to said adder means to compare the sign of each one of said pairs of exponent values with the sign of each other of said pairs of exponents; positive exponentiator means coupled to said comparator means to exponentiate said pairs of added exponent values having like signs to form a plurality of positive exponents; and negative exponentiator means coupled to said comparator means to exponentiate said pairs of added exponent values having unlike signs to form a plurality of negative exponentials.
Claim 4
Dependent Claim
33 words
The apparatus of claim 2 wherein said correlator means includes: positive accumulator means and negative accumulator means interconnected with said exponentiator means to form the cummulative sum of said positive and negative exponentials.
Claim 5
Dependent Claim
48 words
The apparatus of claim 3 wherein said correlator means further includes: complementer means interconnected with said negative accumulator means to complement the negative sum; and adder means coupled to said complementor and said positive accumulator to add said positive and complemented negative sums to form a covariance value.
Claim 6
Dependent Claim
13 words
The apparatus of claim 4 and including: means to store said covariance value.
Claim 7
Dependent Claim
22 words
The apparatus of claim 4 and including: means interconnected with said adder means to display said covariance value as a visual recording.
Claim 8
Dependent Claim
22 words
The apparatus of claim 1 wherein said correlator means further including: exponentiator means for exponentiating the sums produced by said adder means.
Claim 9
Dependent Claim
26 words
The apparatus of claim 7 wherein said correlator means further including: means for determining the sign appropriate to each exponentiated sum produced by said eXponentiator means.
Claim 10
Dependent Claim
24 words
The apparatus of claim 8 wherein said correlator means further including: accumulator means for accumulating said exponentiated sums in accordance with said determined signs.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |