Intelligent passive navigation system for back-up and...

Data processing: vehicles – navigation – and relative location – Navigation – Employing position determining equipment

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C701S207000, C342S417000, C342S463000

Reexamination Certificate

active

06917880

ABSTRACT:
A passive navigation system for an airborne platform includes an on-board computer having a database that contains preprogrammed information regarding pre-existing ground-based signal emitters (e.g. cell-phone, television and radio broadcast transmitters). For each emitter, the database includes the geolocation of the emitter and identifying signal characteristic(s) of each emitter's signal such as frequency, bandwidth and strength. An antenna array and digital receiver cooperate with the computer on the platform to passively receive signals from the emitters and determine a direction of arrival (DOA) for selected signals. The computer also extracts identifying signal characteristic(s) from selected received signals and matches them against the database information to ascertain the geolocation of the emitter that corresponds to the received signal. The platform location is then calculated from the DOA(s) and emitter geolocations using a triangulation-type algorithm. Also, preprogrammed site-specific terrain scattering information can be compared to observed scattered signals to enhance system accuracy.

REFERENCES:
patent: 4215345 (1980-07-01), Frosch et al.
patent: 4728959 (1988-03-01), Maloney
patent: 5534876 (1996-07-01), Erickson
patent: 5583517 (1996-12-01), Yokev
patent: 5596330 (1997-01-01), Yokev
patent: 5999131 (1999-12-01), Sullivan
patent: 6147646 (2000-11-01), Arneson et al.
patent: 6185486 (2001-02-01), Labounsky et al.
patent: 6232917 (2001-05-01), Baumer et al.
patent: 6255992 (2001-07-01), Madden
patent: 6580393 (2003-06-01), Holt
patent: 6657549 (2003-12-01), Avery
patent: 6714782 (2004-03-01), Monot et al.
patent: 2002/0009994 (2002-01-01), Sample
patent: 2003/0144007 (2003-07-01), Johansson et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Intelligent passive navigation system for back-up and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Intelligent passive navigation system for back-up and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intelligent passive navigation system for back-up and... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3381127

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.