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对连续波半主动导引头过量的外部杂音进行了分析和理论计算,并用实验数据加以对照.引起导引头过量外部杂音的原因有:发射机调频杂音;地物背景反射;导弹飞行时,导弹与地物及弹目之间的相对速度不同.对计算和靶试遥测数据的分析表明,在导弹发射后2s时,中低空连续波导引头的外部杂音的强度要比目标信号高出50—70dB.连续波导引头要获得良好的低空性能,必须在信号的识别、搜索和跟踪各环节中采取各项有效措施,与强杂波相抗衡.
The excessive external noises of CW semi-active seeker are analyzed and theoretically calculated and compared with the experimental data.The causes of excessive external noises of seeker are as follows: the FM noise of transmitter, the background reflection of ground objects, The relative velocities between missiles and ground objects and projectiles are different.The analysis of the calculated and target telemetry data shows that the intensity of the external noise of the mid-low-level continuous wave seeker is 50% higher than the target signal at 2 s after the launch of the missile -70dB. Continuous waveguide seeker In order to obtain good low-altitude performance, it is necessary to take effective measures in signal identification, search and tracking to contend with strong clutter.