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Conformal arrays, distributed processors and bistatic architectures allow us to develop more and more effective phased array multifunction radars. In particular, conical (as well as cylindrical) arrays permit to avoid scan angle losses, and multiple sub-arrays with digital beamforming enhance the time-energy efficiency by executing in parallel the various radar tasks. A system architecture, now under...
Multilateration (MLAT) and Automatic Dependent Surveillance — Broadcast (ADS-B) systems exploiting the Secondary Surveillance Radar (SSR) channel suffer from garbling. This means that if two or more mode S signals impinge on the receiver at the same or very near time they could not be decoded. To alleviate this problem, many solutions have been proposed, one in particular [1] is effective for a large...
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 and one with a logarithmic receiver) connected...
Traditional millimeter wave Surface Movement Radar (SMR) have been designed and tested. A novel concept for the design of a new SMR is suggested based upon Synthetic Aperture Antenna and Noise Radar Technology. It enables designing of SMR without mechanical rotation of an antenna, but applying several nonmoving Synthetic Aperture Antennas instead. Application of Noise Radar Technology is also considered...
Secondary surveillance radar (SSR) was originated in the 40's as an Identification Friend or Foe (IFF) system and, starting from the psila50 and psila60, provided the air traffic control (ATC) with identity and altitude data for the aircraft under coverage, implementing a rough form of cooperative independent surveillance, complementing the non-cooperative surveillance of the primary radar and very...
Noise Radar Technology (NRT) uses noise waveforms (continuous or pulsed) as a radar signal and correlation processing of the returns for their optimal reception. This paper is devoted to some possible applications of NRT in civil field, in particular to millimetre-wave radars, with comparison of the use of Noise W-band radar versus the more classical FM-CW or pulse compression solutions.
Grouping of a set of SSR Mode S stations into functional entities called clusters has significant operational facets; it calls for a constrained optimization, an important significant constraint being the scarcity of Interrogation Identifier codes. This problem can be approached by two ways, i.e., integer programming methods and heuristic approaches. The definition of a general, usable decision support...
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