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Classification of air targets including a rejection stage for unknown targets

: Haumtratz, T.; Worms, J.; Schiller, J.

Levitas, B. ; Institute of Electrical and Electronics Engineers -IEEE-:
11th International Radar Symposium, IRS 2010 : Vilnius, Lithuania, 16 - 18 June 2010; Part of 4th Microwave and Radar Week (MRW-2010)
Piscataway/NJ: IEEE, 2010
ISBN: 978-1-4244-5613-0 (Print)
ISBN: 978-9955-690-18-4
International Radar Symposium (IRS) <11, 2010, Vilnius>
Microwave and Radar Week (MRW) <4, 2010, Vilnius>
Fraunhofer FHR

In this paper an algorithm for Non-Cooperative Target Identification (NCTI) of airplanes is presented. The advantage of NCTI over Identification Friend - Foe-systems (IFF-systems) is its ability to identify positively not only friendly airplanes but also neutral or hostiles ones. The approach described here uses one-dimensional radar images, so-called High Range Resolutionprofiles (HRR-profiles) for NCTI. However only the locations of the local maxima of the HRR-profiles were used for classification instead of using the whole HRR-profiles. Furthermore a statistical test procedure is presented that is carried out prior to the classification procedure to determine if an airplane belongs to a known or to an unknown class of airplanes without distinguishing the known classes of airplanes.