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US5731706A
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Method for efficient calculation of power sum cross-talk loss
Assignee: Fluke Corp
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Filing: 1997-02-18
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Granted: 1998-03-24
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Expires: 2017-02-18
Abstract
Abstract An efficient method for calculating Power Sum cross-talk loss is provided. Cross-talk loss measurements may include near-end cross-talk (NEXT) loss, far-end cross-talk (FEXT) loss, multiple disturber NEXT (MD NEXT) loss, and multiple disturber FEXT (MD FEXT) loss. Pair-to-Pair cross-talk loss responses are collected between a given wire pair and all the other wire pairs of concern, with each pair-to-pair cross-talk loss measurement having a number of frequency data points corresponding to the frequencies of interest. The pair-to-pair cross-talk loss response having the lowest positive value for a particular frequency data point is first selected as the baseline cross-talk loss response. The effects of each of the remaining pair-to-pair cross-talk loss responses on the baseline cross-talk loss response are then accounted for by applying power sum contribution values obtained from a look-up table. In this way, Estimated Power Sum cross-talk loss may be calculated for each of the corresponding frequency data points from each of the pair-to-pair cross-talk loss measurements in an efficient manner.
Inventors
- 👤 Henriecus Koeman
- 👤 Craig Vincent Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:48
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/46; H04B3/487; G; G01; G01R; G01R31/00; G01R31/50; G01R31/58
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
A method for efficiently calculating Power Sum cross-talk loss comprising: (a) acquiring a plurality of pair-to-pair cross-talk loss responses; (b) selecting one of said pair-to-pair cross-talk loss responses having the lowest cross-talk performance of said plurality of said pair-to-pair cross-talk loss responses as a baseline NEXT response; (c) obtaining power sum contribution values for each of the other pair-to-pair cross-talk loss responses from a look-up table; and (d) subtracting each of said power sum contribution values from said baseline cross-talk response to obtain an estimated Power Sum cross-talk response.
Claim 2
Independent Claim
89 words
A method for efficiently calculating Power Sum cross-talk loss comprising: (a) acquiring a plurality of pair-to-pair cross-talk loss responses; (b) selecting one of said pair-to-pair cross-talk loss responses having the lowest cross-talk performance of said plurality of said pair-to-pair cross-talk loss responses as a baseline NEXT response; (c) obtaining power sum contribution values for each of the other pair-to-pair cross-talk loss responses from a look-up table; and (d) subtracting each of said power sum contribution values from said baseline cross-talk response to obtain an estimated Power Sum cross-talk response.
Claim 3
Dependent Claim
28 words
A method for efficiently calculating Power Sum cross-talk loss according to claim 1 wherein each of said pair-to-pair cross-talk loss responses comprises a plurality of frequency data points.
Claim 4
Dependent Claim
31 words
A method for efficiently calculating Power Sum cross-talk loss according to claim 2 further comprising obtaining said estimated Power Sum cross-talk response over each of said plurality of frequency data points.
Claim 5
Dependent Claim
42 words
A method for efficiently calculating Power Sum cross-talk loss according to claim 1 further comprising obtaining each of said power sum contribution values from said look-up table responsive to differences between said baseline cross-talk loss and each said pair-to-pair cross-talk loss responses.
Claim 6
Dependent Claim
49 words
A method for efficiently calculating Power Sum cross-talk loss according to claim 1 wherein each of said cross-talk loss responses further comprises one of a near-end cross-talk loss response, a far-end cross-talk loss response, a multiple disturber far-end cross-talk loss response, and a multiple disturber near-end cross-talk loss response.
Claim 7
Independent Claim
122 words
A method for efficiently calculating Power Sum cross-talk loss comprising: (a) acquiring a plurality of pair-to-pair cross-talk loss responses wherein each of said pair-to-pair cross-talk loss responses comprises a plurality of frequency data points; (b) selecting one of said pair-to-pair cross-talk loss responses having the lowest cross-talk performance of said plurality of said pair-to-pair cross-talk loss responses as a baseline NEXT response for each of said plurality of frequency data points; (c) obtaining power sum contribution values for each of the other pair-to-pair cross-talk loss responses from a look-up table; and (d) subtracting each of said power sum contribution values from said baseline cross-talk response to obtain an estimated Power Sum cross-talk response over each of said plurality of frequency data points.
Claim 8
Independent Claim
122 words
A method for efficiently calculating Power Sum cross-talk loss comprising: (a) acquiring a plurality of pair-to-pair cross-talk loss responses wherein each of said pair-to-pair cross-talk loss responses comprises a plurality of frequency data points; (b) selecting one of said pair-to-pair cross-talk loss responses having the lowest cross-talk performance of said plurality of said pair-to-pair cross-talk loss responses as a baseline NEXT response for each of said plurality of frequency data points; (c) obtaining power sum contribution values for each of the other pair-to-pair cross-talk loss responses from a look-up table; and (d) subtracting each of said power sum contribution values from said baseline cross-talk response to obtain an estimated Power Sum cross-talk response over each of said plurality of frequency data points.
Claim 9
Dependent Claim
49 words
A method for efficiently calculating Power Sum cross-talk loss according to claim 6 wherein each of said cross-talk loss responses further comprises one of a near-end cross-talk loss response, a far-end cross-talk loss response, a multiple disturber far-end cross-talk loss response, and a multiple disturber near-end cross-talk loss response.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-03-23 | 2001-09-22 | 2002-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-23 | 2005-09-22 | 2006-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-23 | 2009-09-22 | 2010-03-24 | $7700.00 | Window Closed / Lapsed |