多元红外导引头预处理电路带宽设计与仿真研究

以正交四元探测系统为例，介绍了多元红外导引头的工作原理。为了有效设计多元红外导引头预处理电路带宽，利用Matlab进行仿真，通过仿真分析了预处理电路高端和低端带宽的选择对信号提取的影响，并研究了预处理带宽选择对抗人工干扰的影响。仿真结果表明，频带低端设置对信号下沉有较大影响，频带高端设置对脉冲下降沿产生的负脉冲有较大影响。在对抗大倍数人工诱饵干扰时，电路的低端带宽选择会对抗干扰带来显著影响。最后利用仿真结果，设计了红外四元导引头的预处理电路，经内外场测试，该电路在目标脉冲信号提取及抗人工干扰性能方面表现出了良好的性能。

Bandwidth design and simulation of the pre-process circuit for multi-element IR missile seeker

The principle of multi-element IR missile seeker with four-element detection system is introduced. The bandwidth design of pre-process circuit for multi-element IR missile seeker is discussed and the effect of the bandwidth on signal-detection and anti-artificial countermeasure is analyzed. Simulation result shows that the low frequency makes the wave go down and the high frequency affects the negative pulse deeply, and the low frequency affects the ability of anti-strong-artificial countermeasure. Finally, pre-process circuits for four-element IR missile seeker are designed based on the simulation result. The circuit works well with signal-detection and anti-artificial countermeasure in laboratory and field experiments.