Bae Systems Information and Electronic Systems Integration Inc.

Bae Systems Information and Electronics Systems Integration Inc.

Joel D Reiss

Gary R Lomp

Matthew J Sherman

David A Haessig, Jr

David M Cooper

Andrew Hunton

Dominick J Gasparri

Andrew M Comba

The present disclosure provides a spread spectrum landing system with a low probability of intercept altimeter that is in communication with a plurality of asymmetrically placed antennas or transponders near a landing area. The low probability of intercept altimeter acts as a secondary system in the event that a primary landing system for the mobile platform is denied or otherwise inoperable. The low probability of intercept altimeter cycles through unique pseudo noise (PN) codes to determine a line of sight relative to each antenna or transponder. A single algorithm or process determines and ranges the platform relative to the transponders to effectuate the landing of the platform.

Aircraft derived spread spectrum landing system

A method for Link 16-based geolocation of hostile jammers comprising the steps of collecting jamming noise I/Q samples at a plurality of locations, determining the relative time delay of reception between two or more of the locations, determining the first derivative of the time delay of reception between the two or more locations, and using the results calculated in the preceding step to determine the position of the hostile jammers.

Link 16-based geolocation of hostile jammers

A system and method for calculating a time of arrival (TOA) of an electromagnetic signal is presented. A method receives a fast Fourier transform (FFT) signal that is a FFT of an original electromagnetic signal containing symbol data. The FFT signal is either multiplied or divided with a value to remove the symbol data. Removing the symbol data generates a perturbed data values representing perturbed signal with a perturbed covariance. The method calculates a perturbed covariance of the perturbed data values. After the perturbed covariance is calculated, the method at least partially corrects the perturbed covariance to produce a corrected covariance. The TOA of the original electromagnetic signal is calculated based, at least in part, on the perturbed covariance.

Method and apparatus for waveform independent ranging

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Bloomfield, NJ, United States of America

Joel D Reiss