Skip to Main content Skip to Navigation
Journal articles

Algebraic Algorithms to Separate Overlapping Secondary Surveillance Radar Replies

Abstract : The Secondary Surveillance Radar (SSR) is a transponder system used in air traffic control. Due to growing traffic densities, it is increasingly likely that a ground station receives a mixture of responses of various aircraft, partly overlapping in frequency and time. Currently such "collisions" are disregarded, at a loss of system performance and reliability. In this article, we propose to equip the ground station with an antenna array, and investigate techniques to blindly separate such a mixture based on source waveform properties. At base-band, a received SSR signal consists of a binary sequence with alphabet ¼ ½ , modulated by a complex exponential due to the residual carrier frequency. We present three algebraic algorithms to compute the separating beamformers by taking into account the particular modulation format of the received signal. The Cramer-Rao Bound is derived, extensive simulations are presented, and an experimental platform has been built to collect measurement data and demonstrate the algorithms.
Document type :
Journal articles
Complete list of metadata

Cited literature [36 references]  Display  Hide  Download
Contributor : Nicolas Petrochilos Connect in order to contact the contributor
Submitted on : Saturday, December 7, 2019 - 4:19:17 PM
Last modification on : Thursday, October 14, 2021 - 1:10:09 PM
Long-term archiving on: : Sunday, March 8, 2020 - 1:35:05 PM


Publisher files allowed on an open archive




Nicolas Petrochilos, Alle-Jan van Der Veen. Algebraic Algorithms to Separate Overlapping Secondary Surveillance Radar Replies. IEEE Transactions on Signal Processing, Institute of Electrical and Electronics Engineers, 2007, 55 (7), pp.3746 - 3759. ⟨10.1109/TSP.2007.894248⟩. ⟨hal-01693636⟩



Record views


Files downloads