对脉冲压缩雷达的多相位分段调制干扰方法研究

对雷达干扰信号的分析与设计是雷达对抗领域的热点问题之一。本文针对脉冲压缩体制雷达的特点,提出一种多相位分段调制干扰方法,通过部分破坏和保留原雷达信号的相干性实现局部遮盖干扰。对多相位分段调制的工作原理进行详细说明,给出干扰信号的数学推导。以应用线性调频信号的脉冲压缩雷达为例,结合自卫式干扰模型,推导了干扰信号的幅相特性和脉冲压缩结果,分析了调制参数对干扰遮盖范围的影响。最后,对相关结论进行仿真验证,说明应用该干扰方法能够产生灵活可控的局部遮盖干扰,具备实用性。 

Research on Multiple Phase Sectionalized Modulation Jamming Method for Pulse Compression Radar

The design and analysis of radar jamming signal is a main stream in radar countermeasures. This paper proposes a jamming method for pulse compression (PC) radar based on Multiple Phase Sectionalized Modulation (MPSM), and the signal’s coherence is partly kept and broke so as to achieve partial covering jamming effects. The principle of MPSM is elaborated at first, and the jamming signal’s generation is derived in details. Typical pulse compression radar using linear frequency modulation signals is raised as an example to illustrate the principle. Combined with the mathematical model of self defense jamming scene, the magnitude phase characteristics and pulse compression result of jamming signals are derived, and the impact on jamming covering scope by adjusting the MPSM parameters is analyzed. Finally, the simulation is conducted to prove the related conclusion above, and it is obvious that this jamming method can produce plenty of false targets flexibly and its covering scope is controllable,which is usable in practice.