摘要: The rapid and reliable identification of (air-) targets at maximum surveillance systems and weapon systems range is still a challenging problem which has a long history in NATO research studies. The different techniques that have ... 展开 The rapid and reliable identification of (air-) targets at maximum surveillance systems and weapon systems range is still a challenging problem which has a long history in NATO research studies. The different techniques that have been proposed to solve this problem may roughly be divided into two classes: cooperative and non-cooperative techniques. Cooperative techniques (often referred to as IFF - Identification Friend or Foe - techniques) are already operational in the radar domain, e.g. in airborne radars. NATO fighter aircraft are equipped with transponder systems answering on authorized interrogations by transmitting a predetermined coded signal. By this, friendly aircraft may be identified but positive identification of hostile or neutral aircraft is not possible. This could in principle be achieved by the so-called non-cooperative identification techniques which rely on a comparison between the measured target signature with a reference data base. As one of the most promising techniques with long-range capability, radar based NCTI can be characterized. New developments in radar techniques should allow for major advances in radar based NCTI. 收起