Mauro Leonardi

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Two new closed form localization algorithms for multilateration systems are derived and analyzed. The derivation neglects the time difference of arrival in favor of the direct use of the time of arrival (TOA). The algorithms work for arbitrary spatial dimensions and overdetermined systems. A strategy for quick rejection of obviously false time measurements(More)
Automatic Dependent Surveillance-Broadcast (ADS-B) systems provide to the air traffic control centers flight and status information of the cooperating targets. Problems due to jamming and/or spoofing of the ADS-B channel are under study, as well as verification and validation techniques. In this paper, we show how a low cost jammer can affect an ADS-B(More)
We study, evaluate and develop the use of regularization methods to solve the location problem in multilateration systems using Mode-S signals. The Tikhonov method has been implemented as a first application to solve the classical system of hyperbolic equations in multilateration systems. Some simulations are obtained and the results are compared with those(More)
We study and develop some strategies to design and deploy Mode-S multilateration systems. These strategies are based on metaheuristic optimization techniques, like Genetic Algorithm (GA) and are intended to obtain useful parameters for an optimal system configuration that provides acceptable performance levels. Furthermore, these strategies are able to(More)
Target position integrity is very important when this information is used for surveillance and safety purposes as in a multilateration system (MLAT). In this paper some of the classical satellite navigation algorithms are modified to be applied to the MLAT environmental and one of the big limitations of these algorithms i.e. the single fault hypothesis is(More)
In this work the potential usage of ADS-B and Wide Area Multilateration (WAM) Surveillance with High Altitude Platform Systems (HAPS) is considered. The paper investigates the possible configuration of the system, the link budget, the geometry and the limitation due to the random access to the channel by the Mode S Signals (capacity). The surveillance(More)
The Transponder Data Recorder is an experimental 1090 MHz signal acquisition system designed by the Radar and Navigation group at Tor Vergata University to record the signals in the Secondary Surveillance Radar band, centered at 1090 MHz. The peculiarity of the receiver is that it is based on five receiving chains (4 linear chains with large dynamic range(More)
In the paper we present a solution to the optimal trajectory planning problem subject to constraints given by the actuator torques and velocities, and the task. The main result is a trajectory planning algorithm which enables the calculation of the optimal motion due to the given requirements and taking into account the dynamics of the manipulator. The(More)
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