US5805200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for determining position from pseudorandomly modulated radio signals
Assignee: Western Atlas International Inc
•
Filing: 1997-08-11
•
Granted: 1998-09-08
•
Expires: 2017-08-11
Abstract
Abstract This invention provides a method and apparatus for determining position from code modulated, suppressed carrier signals received from satellites, in which a digital composite of the signals received from a plurality of satellites is formed at a first point, the digital composite is processed to measure the carrier phase of the signal from each of the plurality of satellites to derive computer data, and said computer data are combined with data derived from measurements of signals received from the same plurality of satellites at another point, to determine position data.
Inventors
- 👤 Charles C. Counselman, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:54
CPC Classifications
G; G01; G01S; G01S19/00; G01S19/01; G01S19/13; G01S19/35; G01S19/37; G01C; G01C15/00; G01S19/21; G01S19/24; G01S19/29; G01S19/36; G01S19/38; G01S19/39; G01S19/42; G01S19/43; G01S19/44
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
82 words
A method for determining position from pseudorandom code modulated, suppressed carrier signals received from satellites, comprising: forming a digital composite of said signals received from a plurality of satellites at a first point; processing said composite to measure the carrier phase of the signal from each of said plurality of satellites, to derive computer data; and combining said data, in order to determine position, with data derived from measurements of signals received from the same plurality of satellites at an other point.
Claim 2
Independent Claim
82 words
A method for determining position from pseudorandom code modulated, suppressed carrier signals received from satellites, comprising: forming a digital composite of said signals received from a plurality of satellites at a first point; processing said composite to measure the carrier phase of the signal from each of said plurality of satellites, to derive computer data; and combining said data, in order to determine position, with data derived from measurements of signals received from the same plurality of satellites at an other point.
Claim 3
Dependent Claim
23 words
The method of claim 1, wherein the position of said first point is determined with respect to the position of said other point.
Claim 4
Dependent Claim
30 words
The method of claim 1, wherein the step of combining computer data from said first point and said other point further comprises resolving integer cycle ambiguity in said computer data.
Claim 5
Dependent Claim
30 words
The method of claim 2, wherein the step of combining computer data from said first point and said other point further comprises resolving integer cycle ambiguity in said computer data.
Claim 6
Dependent Claim
31 words
The method of claim 1, further comprising: processing said computer data to reduce errors in said position determination caused by scattering or reflections of said pseudorandom code modulated, suppressed carrier signals.
Claim 7
Dependent Claim
31 words
The method of claim 2, further comprising: processing said computer data to reduce errors in said position determination caused by scattering or reflections of said pseudorandom code modulated, suppressed carrier signals.
Claim 8
Dependent Claim
100 words
Apparatus for determining position from pseudorandom code modulated, suppressed carrier signals received from satellites, comprising: an analog to digital converter responsive to a composite of said signals received from a plurality of satellites at a first point, for forming a digital representation of said composite; a digital signal processor for deriving computer data from said digital representation in response to the carrier phase of the signal from each of said plurality of satellites; and a data processor for determining position by combining said data with data derived from signals received from the same plurality of satellites at an other point.
Claim 9
Dependent Claim
100 words
Apparatus for determining position from pseudorandom code modulated, suppressed carrier signals received from satellites, comprising: an analog to digital converter responsive to a composite of said signals received from a plurality of satellites at a first point, for forming a digital representation of said composite; a digital signal processor for deriving computer data from said digital representation in response to the carrier phase of the signal from each of said plurality of satellites; and a data processor for determining position by combining said data with data derived from signals received from the same plurality of satellites at an other point.
Claim 10
Dependent Claim
25 words
The apparatus of claim 7, wherein said data processor determines the position of said first point with respect to the position of said other point.
Claim 11
Dependent Claim
18 words
The apparatus of claim 7, wherein said digital signal processor resolves integer cycle ambiguity in said computer data.
Claim 12
Dependent Claim
18 words
The apparatus of claim 8, wherein said digital signal processor resolves integer cycle ambiguity in said computer data.
Claim 13
Dependent Claim
33 words
The apparatus of claim 7 wherein said data processor processes said computer data to reduce errors in said position determination caused by scattering or reflections of said pseudorandom code modulated, suppressed carrier signals.
Claim 14
Dependent Claim
33 words
The apparatus of claim 8 wherein said data processor processes said computer data to reduce errors in said position determination caused by scattering or reflections of said pseudorandom code modulated, suppressed carrier signals.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-09-07 | 2002-03-09 | 2002-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-07 | 2006-03-09 | 2006-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-07 | 2010-03-09 | 2010-09-08 | $7700.00 | Window Closed / Lapsed |