Self-adapting RF Stealth Signal Design Method in RATR

应用于雷达自动目标识别的自适应射频隐身信号设计方法

Combining the mutual information theory and the sequential hypothesis testing(SHT)method,a selfadapting radio frequency(RF)stealth signal design method is proposed. The channel information is gained through the radar echo and feeds back to the radar system,and then the radar system adaptively designs the transmission waveform. So the close-loop system is formed. The correlations between these transmission waveforms are decreased because of the adaptive change of these transmission waveforms,and the number of illuminations is reduced for adopting the SHT,which lowers the transmission power of the radar system. The radar system using the new method possesses the RF stealth performance. Aiming at the application of radar automatic target recognition(RATR),experimental simulations show the effectiveness and feasibility of the proposed method.

结合互信息理论与序贯假设检验方法,提出了一种自适应射频隐身信号设计方法。该方法通过发射信号了解外界环境信息,及时反馈这些信息给雷达系统。基于这些信息,雷达系统能够自适应设计雷达信号,从而形成一个闭环系统。雷达信号的自适应变化减小了信号间的相关性,并且由于采用序贯假设检验,减少了照射次数,降低了系统辐射功率,从而实现了雷达系统的射频隐身性能。以雷达目标识别为具体应用,实验仿真说明了此方法的有效性和可行性。