噪声干扰对机载雷达系统效果评估和建模

选取干扰破坏因子作为评估标准,解决了自卫干扰和多架远距离支援干扰飞机下,多普勒噪声或调幅、调频噪声干扰对PD、脉冲机载雷达效果评估问题。在雷达方程和干扰方程基础上建立了数学模型,并用MATLAB实现,特别是远距离支援干扰考虑了斯韦林目标模型、大气、降雨影响,计算结果表明:不同的斯韦林目标模型下干扰破坏因子相同;噪声功率密度越大,干扰破坏因子就越大,即雷达探测距离减少的倍数增大。

Modeling and Effects Evaluation of Noise Jamming on Airborne Radar

Using jamming destroy factor as evaluation standard, the effects evaluation problem of Doppler noise, AM noise and FM noise jamming on airborne pulse radar were solved and PD radar under the circumstances of self-screening jamming and multiple standed off jamming aircrafts. A mathematic model was set up based on the radar equation and jamming equation, and realized with MATLAB. Especially, the Swerling model, atmosphere and rain influence are considered in the simulation of stand off jamming. The result indicates that the jamming destroy factors of different Swerling models are equal, and the jamming destroy factor or the decreasing degree of radar detecting range increases with the power density of noise.