This is a Provisional Application for a Patent. The Patent application has not been examined.
System and Method For Sensing Aircraft and
Other Objects
Application
Number 61/256,765
Filed
10/30/2009
Jed Margolin
The Patent Office requires that the Abstract
be one paragraph. I have separated it here into parts to make it clearer:
[113] ABSTRACT
OF THE DISCLOSURE
The reliability and safety of TCAS and ADS-B are improved by using the signals transmitted from a TCAS or ADS-B unit as a radar transmitter with a receiver used to receive reflections. With a standard omni-directional antenna the reflections can be used to determine the range of other aircraft and match the range and number of targets to the TCAS or ADS-B signals normally received. Doppler analysis can be used to confirm the speeds of the targets. With a directional antenna the TCAS or ADS-B system provides the range and bearing of aircraft and other objects in the vicinity of the user’s aircraft even when other aircraft are not equipped with TCAS or ADS-B.
Aircraft and other objects using spread spectrum radar are detected by using two separate receiving systems. Cross-Correlation between the outputs of the two receiving systems reveals whether a noise signal is produced by the receiving systems themselves or is coming from the outside.
A system and method for sensing aircraft and other objects uses bistatic radar with spread-spectrum signals transmitted from remotely located sources such as aircraft flying at very high altitudes or from a satellite constellation. Only authorized users will have the encryption key and be able to use the system.
A bistatic spread
spectrum radar system using a satellite constellation can be integrated with a
communications system.
I did
the drawings with some colored lines to make some of the figures clearer. The
Patent Office doesn't like color so I gray-scaled the version I filed.
The
version I have attached is the color version. Otherwise it is the same as the
version I filed.
Jed Margolin
October 31, 2009
This patent application is for sale.
References
The listed links are the original
links. In some cases they may be broken. The PDF version was made from the
original link.
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Ref. 1: 14 CFR § 91.113(b) Right-of-way rules: Except water operations. http://ecfr.gpoaccess.gov/cgi/t/text/text-idx?c=ecfr&sid=4f09aa904bfbb808de07eada6cb86e5a&rgn=div8&view=text&node=14:2.0.1.3.10.2.4.7&idno=14 |
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Ref. 2: 14 CFR § 91.115(a) Right-of-way rules: Water operations. http://ecfr.gpoaccess.gov/cgi/t/text/text-idx?c=ecfr&sid=4f09aa904bfbb808de07eada6cb86e5a&rgn=div8&view=text&node=14:2.0.1.3.10.2.4.8&idno=14 |
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Ref. 3: |
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Ref. 4: Introduction to TCAS II Version 7, United States Department of Transportation, Federal Aviation Administration November 2000. www.arinc.com/downloads/tcas/tcas.pdf |
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Ref 5: |
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Ref. 6: Gulf of Mexico Helo Ops Ready for ADS-B, Aviation Week & Space Technology, Francis Fiorino, 02/26/2007, page 56. |
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Ref. 7: |
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Ref. 8: Test
Results from a Novel Passive Bistatic GPS Radar Using a Phased Sensor Array,
Alison Brown and Ben Mathews, NAVSYS Corporation, Proceedings of ION NTM 2007, |
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Ref. 9: |
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Ref. 10: Shift Register With Feedback Generates White Noise, Marc Damashek, Electronics magazine, May 27, 1976. |
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Ref. 11:
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Ref. 12: |
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Ref. 13:
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Ref. 14:
Shift Register Sequences, S. Golomb (Holden-Day Inc., San
Francisco, 1967, and Aegean Park Press, 1982) |
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Ref. 15:
The ABCs of Spread Spectrum - A Tutorial, Randy Roberts,
Director of RF/Spread Spectrum Consulting. http://sss-mag.com/ss.html |
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Ref. 16:
Undetectable Radar? (Probably Not), Erik Hundman,
Defensetech.org, August 3, 2006. http://www.defensetech.org/archives/002641.html |
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Ref. 17:
From a Different Perspective: Principles, Practice, and
Potential of Bistatic Radar by H.D. Griffiths, Dept. of Electron. & Electr. |
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Ref. 18:
Sensing Requirements for Unmanned Air Vehicles, AFRL's Air Vehicles Directorate, Control Sciences Division,
Systems Development Branch, Wright-Patterson AFB OH, June 2004, http://www.afrlhorizons.com/Briefs/Jun04/VA0306.html
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Ref. 19:
Presentation entitled, Developing Sense & Avoid
Requirements for Meeting an Equivalent Level of Safety (6MB | ppt), given
by Russ Wolfe, Technology IPT Lead, Access 5 Project at UVS Tech 2006. 18
January 2006. |
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Ref. 20:
Presentation Integration into the National Airspace System (NAS)
given by John Timmerman of the FAA’s
Air Traffic Organization (July 12, 2005) |
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Ref. 21:
Zone Ready for Drone, April 7, 2006, on the web site for the FAA’s Air Traffic
Organization Employees, http://www.ato.faa.gov/DesktopDefault.aspx?tabindex=4&tabid=17&itemid=937&mid=103 |
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Ref. 22:
Quadrennial Roles and Missions Review Report, Department of Defense, January
2009. Page 29 (PDF page
37) www.defenselink.mil/news/Jan2009/QRMFinalReport_v26Jan.pdf |
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Ref.
23: Analog Devices, Inc. AD9481: 8-Bit, 250 MSPS, 3.3 V A/D Converter http://www.analog.com/en/analog-to-digital-converters/ad-converters/ad9481/products/product.html |
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Ref. 24:
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Ref.
25: |
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Ref.
26: Simple Solutions for Hyperbolic and
Related Position Fixes, Bertrand T. Fang, The Analytic Sciences Corp.;
IEE Transactions on Aerospace and Electronic Systems, Publication
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0018-9251 https://svn.v2.nl/andres/Documentation/TDOA/Simple_Solutions_for_TDOA-fang.pdf |
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Ref. 27: Lissajous
Figures, Jed Margolin, May 2001; http://www.jmargolin.com/mtest/LJfigs.htm |