System and method for providing timing services and DME...

Details System and method for providing timing services and DME... System and method for providing timing services and DME...

2010-07-20

2011-11-22

Mehmood, Jennifer (Department: 2612)

Communications: electrical

Selective

Interrogation response

C342S047000, C342S125000

Reexamination Certificate

active

08063744

ABSTRACT:
The present invention utilizes the existing DME transponder system infrastructure to augment existing ground surveillance multilateration (MLAT) capabilities by providing additional measurements for determining the position of an aircraft equipped with a DME transponder. DME listeners receive DME interrogation signals and DME reply signals, determine TDOA between the DME transponder and each DME listener, and transmit data to a central computer that clusters TDOAs between the DME transponder and the DME listeners and computes the aircraft position using the clustered TDOAs. The DME-aided MLAT can be used as a backup surveillance system when GNSS-based systems are unavailable. The DME-aided MLAT can be integrated with SSR receive units (RUs) performing multilateration (MLAT) calculations.

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Michael R. Owen, “Correlation of DME Pulse Trains for Use in a Multilateration,” IEEE Xplore Digital Library, Integrated Communications, Navigation and Surveillance Conference, Jul. 16, 2007.

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