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文中介绍了7710型对流层散射信道模拟器中所需的多路低频噪声源的工作原理,对 M 序列的性质作了简要说明,计算了五阶巴特沃斯有源低通滤波器的元件参数,对可变分频器作了介绍,给出了 M 序列的自检方法,并说明了有关试验结果。
This paper introduces the working principle of multi-channel low-frequency noise source required in 7710 Troposphere Scatter Channel Simulator. The properties of M-sequence are briefly described. The parameters of fifth-order Butterworth active low-pass filter are calculated, The variable frequency divider is introduced, the self-test method of M sequence is given, and the related test results are illustrated.