Secondary Surveillance radar (SSR) is a key equipment in Air Traffic Control (ATC) and military Identification Friend or Foe (IFF). Since very high reliability and stability is required in these two areas, SSR is a hot issue in Radar signal processing.

• 二次雷达(Secondary Surveillance Radar)是民航空中管制(Air Traffic Control)和军事敌我识别(Identification Friend or Foe)系统中的关键部分,由于这两个应用领域都要求很高的可靠性和稳定性,因此,二次雷达一直是国内外雷达信号处理领域的研究热点。