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US3864682A
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Binary phase coded navigation system (bicons)
Assignee: Individual
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Filing: 1969-09-12
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Granted: 1975-02-04
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Expires: 1989-09-12
Abstract
Abstract An apparatus for navigating an aircraft utilizing a pair of antennas which are fixed to the aircraft to receive a binary phase coded signal from a beacon. The correlation of the received binary phase coded signals from the antennas provides an indication of the aircraft''s direction.
Inventors
- 👤 James J Maier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:40
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/02; G01S3/14; G01S3/46; G01S3/48
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
121 words
A binary phase coded navigation system in combination comprising: a ground-based beacon emitting a carrier frequency, said carrier frequency being phase coded to provide a binary phase coded signal, said binary phase coded signal being a pseudo-random code, said binary phase coded signal having a code length, a first airborne receiving means for receiving said binary phase coded signal, a second airborne receiving means displaced from said first airborne receiving means by a predetermined distance, said second airborne receiving means also receiving said binary phase coded signal, and a correlation means connected to said first and second receiving means, said correlation means correlating said binary phase coded signals from said first and second airborne receiving means to provide a correlation pulse.
Claim 2
Dependent Claim
121 words
A binary phase coded navigation system in combination comprising: a ground-based beacon emitting a carrier frequency, said carrier frequency being phase coded to provide a binary phase coded signal, said binary phase coded signal being a pseudo-random code, said binary phase coded signal having a code length, a first airborne receiving means for receiving said binary phase coded signal, a second airborne receiving means displaced from said first airborne receiving means by a predetermined distance, said second airborne receiving means also receiving said binary phase coded signal, and a correlation means connected to said first and second receiving means, said correlation means correlating said binary phase coded signals from said first and second airborne receiving means to provide a correlation pulse.
Claim 3
Dependent Claim
23 words
A binary phase coded navigation system as described in claim 1 wherein said ground-based beacon comprises a sequence generator providing a pseudo-random code.
Claim 4
Dependent Claim
52 words
A binary phase coded navigation system as described in claim 1 wherein said correlation unit comprises a multiplier unit for multiplying said binary phase coded signals from said first and second airborne receiving means and integrator for integrating said multiplied binary phase coded signal over the duration of the total code length.
Claim 5
Dependent Claim
79 words
A binary phase coded navigation system as described in claim 1 further including a first n-delay channel unit having a plurality of delay channels, a first switching means for connecting said first airborne receiving means directly through said first n-delay channel unit to said correlation means, a second n-delay channel unit having a plurality of delay channels, a second switching means for connecting said second airborne receiving means directly through said second n-delay channel unit to said correlation means.
Claim 6
Dependent Claim
49 words
A binary phase coded navigation system as described in claim 4 wherein said first switching means connects said first airborne receiving means directly through said first n-delay channel unit to said correlation means, and said second switching means connects said second airborne receiving means directly to said correlation means.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |