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Multilateration (MLAT) is an increasingly important location and identification system for surface traffic surveillance, is in use in large airports such as London-Heathrow, Frankfurt/Main and Rome-Fiumicino. Target location can be extended to approach and terminal area surveillance (wide area multilateration, WAM), with a system coverage to some hundred kilometers around the airport. Practically...
Location and identification of cooperating aircraft in the airport area (and beyond) may be implemented by multilateration (MLAT) systems using the secondary surveillance radar (SSR) mode S signals. Most of these signals, spontaneously emitted from on-board mode S transponders at a fixed carrier frequency, arrive randomly at the receiving station, as well as many mode A/C replies from legacy transponders...
This paper is focused on the 1090 MHz SSR channel capacity increase by innovative transmission and decoding techniques. A lot of Air traffic control systems use the 1090 MHz channel: SSR downlink (on-board transponders), ADS-B messages, TIS-B, FIS-B. We focus the attention on the MLAT (multilateration) system, useful to localize and identify transponder-equipped targets (aircraft and vehicles). Today...
The aims of this work is to analyse the Cramer Rao lower bound (CRLB) for passive location of radio sources, as in multilateration (MLAT) systems and in their wide area version. The CRLB is used, in this paper, as the analysis method for the accuracy of position estimation using different measurements, related in a non-linear way to the target kinematics . The basic measurement is the classical TDOA...
The "multilateration" (MLAT) system is a surveillance and identification element of the A-SMGCS using the SSR transponder (Mode S or even A/C) reply/squitter as signals received by fixed stations where the time-of-arrival (TOA) is measured. In a central processing unit, the target position is estimated by the TDOA technique (time difference of arrival), for which a station is assumed to...
This paper is focused on the implementation of an innovative vehicles surveillance system using the 1090 MHz channel. SSR (secondary surveillance radar) mode S (selective) exploitation in high traffic environment calls for enhancing communication capacity. In the multilateration and ADS-B applications, the presence of both SSR mode S replies and squitter makes the superimposition of 1090 MHz signals...
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