Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Reexamination Certificate
2007-06-19
2007-06-19
Issing, Gregory C. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
Reexamination Certificate
active
10543339
ABSTRACT:
Correlation Interferometer Geo Location (CIGL) uses DF antenna array movement on an aircraft while taking a Plurality of sets of transmitted signal Measurements. Each measurement set is stored as data in a covariance matrix, and the matrices are each decomposed to yield measured array vectors. Using an array manifold table developed during calibration of the CIGI. system, and containing testing array vectors, the measured array vectors are each correlated to testing array vectors to develop a correlation Surface that includes compensation for perturbations Such as aircraft induced electromagnetic scattering, All the correlation surfaces are summed and normalized, with the resultant summation undergoing conjugate gradient processing to more accurately geo-locate the transmitter. Improved accuracy with fewer antennas and polarization independence are also achieved.
REFERENCES:
patent: 3935574 (1976-01-01), Pentheroudaki
patent: 4734702 (1988-03-01), Kaplan
patent: 5039991 (1991-08-01), Boese et al.
patent: 5835060 (1998-11-01), Czarnecki et al.
patent: 6064339 (2000-05-01), Wax et al.
patent: 6255992 (2001-07-01), Madden
patent: 2005/0007278 (2005-01-01), Anson et al.
Baum, Carl E., “Signature-Base Target of Identification and Pattern Recognition,” IEEE Antennas and Propagation Magazine, vol. 36, No. 3, Jun. 1994, pp. 44-51.
Schmidt, Raplh O., “Multilinear Array Manifold Interpolation,” IEEE Trans on Signal Processing, vol. 40, No. 4, Apr. 1992, pp. 857-866.
N.M. Blackman,Position Determination From Radio Bearings,IEEE Transactions on Aerospace and Electronic Systems, pp. 558-560, May 1969.
E.R. Ferrara and T.M. Parks,Direction Finding With An Array of Antennas Having Diverse Polarizations,IEEE Transactions on Antenna Propagation, vol. AP-31, pp. 231-236, Mar. 1983.
N. Saucier and K. Struckman,Direction Finding Using Correlation Techniques,IEEE Antenna Propagation Society International Symposium, pp. 260-263, Jun. 1975.
BAE Systems Information and Electronic Systems Integration Inc.
Funk Joseph E.
Issing Gregory C.
Long Daniel J.
LandOfFree
Correlation interferometer geolocation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Correlation interferometer geolocation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Correlation interferometer geolocation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3836166