Passive radar is one of the most rapidly developing fields in the radar technology in recent years. The ground-based passive radar technology is now entering a stage of maturity. In the past, in a case of active radars, the technology developed for ground-based sensing was adapted for airborne platforms. The same trend has been observed in the passive radar technology as it is being adapted for moving platforms, mostly the airborne ones. Major aims of this adaptation include, among others, protection of the platforms, detection of airborne and surface moving targets and remote sensing, including SAR and ISAR imaging. The use of mobile PCL systems provides an extended functionality in comparison to the one of the stationary ground-based radars. The chapter consists of two key sections. The first section presents the passive imaging technique based on a bistatic SAR concept, the second section discusses the main challenges for the airborne passive radars, in particular a cancelation of Doppler spread clutter, and also presents solutions based on the CLEAN techniques, DPCA and space-time adaptive processing. All theoretical considerations are illustrated with the simulation and experimental validation examples.
Airborne passive radar, Page 1 of 2
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