High-capacity location and identification system for...

Details High-capacity location and identification system for... High-capacity location and identification system for...

2005-10-11

2009-08-04

Pihulic, Dan (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Air traffic control

Secondary surveilance radar

C342S040000

Reexamination Certificate

active

07570195

ABSTRACT:
Cooperating mobiles (ground vehicles, aircraft) are located and identified by Multilateration and Automatic Dependent Surveillance-Broadcast (ADS-B) techniques using the frequency band and the format of the Secondary Surveillance Radar (SSR) signals in high traffic situations. Standard messages, transmitted by the mobile on the downlink channel, i.e. to a set of fixed receiving stations, and including the identification code, permit the location of the mobile by multiple time measurements (Multilateration) from a subset of the set of fixed receiving stations; when the message contains the position (GPS and, later, Galileo datum) the mobile may be located with the ADS-B when in view even of a few stations or of a single station. In order to overcome the problem that arises with high traffic, i.e. the superimposition of signals, called garbling.

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