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有源杂波产生器用来模拟敌人的有源干扰,产生的有源杂波用于实验室和雷达站检验雷达接收机对有源杂波的抗干扰性能。要求产生的有源杂波中心频率为60MHz,频带宽度为10MHz。这种干扰信号形式是调频干扰,就是噪声调频干扰。噪声调频干扰是其频率随某一较低频噪声电压而变化的振荡,该振荡的频率与凋制噪声电压 u,(t)成线性关系:W(t)=W_0+K_(fu)(t)式中:K_f——为调频指数,其意为单位噪声电压引起的角频率偏移。噪声调频干扰电压表达式为:
Active clutter generator is used to simulate the enemy’s active interference, the resulting active clutter for laboratory and radar station to test the radar receiver immunity to active clutter. The required active clutter center frequency is 60 MHz and the bandwidth is 10 MHz. This form of interference signal is FM interference, that is, noise FM interference. The noise FM interference is the oscillation whose frequency changes with a lower-frequency noise voltage. The frequency of this oscillation is linear with the noise voltage u, (t) of the noise. W (t) = W_0 + K_ (fu) ) Where: K_f - FM index, which means that the unit of noise voltage caused by the angular frequency offset. Noise FM interference voltage expression is: