低截获波形是实现机载雷达射频隐身和主动反侦察的重要技术手段,其射频隐身能力的评估具有重要意义。 为了解决现有评估方法计算复杂、实战应用困难的问题,文中提出了一种基于信号瞬时时宽带宽积的低截获波形射频隐身性能评估方法,从截获接收原理与低截获信号波形时频分布特性出发,构建瞬时时宽带宽积表征因子,并利用该评估方法对四种波形进行了仿真实验。实验结果表明:文中所提方法对雷达低截获波形的射频隐身性能具有很好的度量作用。

Low probability of interception ( LPI) waveform is an important technical method to realize the radio frequency ( RF) stealth and active counter reconnaissance of airborne radars, its RF stealth capability evaluation is of great significance. In order to solve the problems of complex calculation and realistic consideration, an LPI waveform RF stealth performance quantitative evaluation method based on the instant time-bandwidth product is proposed. From the intercepted receiving principle and time-frequency distribution characteristics of LPI waveform, instant time-bandwidth product factor is constructed. Simulation is carried out during which four genres of LPI waveforms are evaluated. Testing results show that the proposed method is a good measure for the RF stealth performance of LPI waveforms of airborne radars.

TN973