A Method for Processing Unwanted Target Caused by Reflection in Secondary Surveillance Radar

Along with the development of secondary surveillance radar (SSR) in air traffic surveillance systems, the multipath phenomenon has always been a noticeable problem. This article discusses the geometrical aspect and power aspect of the multipath interference caused by reflection in SSR and proposes a method to deal with these unwanted multipath targets (ghosts) by false-target position predicting and adaptive false-target suppressing, which has been implemented in a SSR's processing system with significant performance since all multipath targets are addressed exactly and suppressed online. A field-experiment example is mentioned at the end of the article to demonstrate the efficiency of this measure.