论文部分内容阅读
1.前言我省有一个电视转播台(电视转播是解调式的),在收转五频道电视信号时,遇到了较强的干扰。从解调后的视频信号中看出干扰信号有三种:(1)高于视频信号幅值2～3倍的脉冲干扰;(2)叠加在同步顶上的低频干扰;(3)在图象中大面积的高频杂波干扰。干扰波形示意如图1。这三种干扰信号中,脉冲干扰最为
1. Preface There is a TV relay station in our province (TV relay is demodulated) and encountered strong interference when TV signals of five channels were collected. From the demodulated video signal, there are three types of interference signals: (1) pulse interference that is 2 ~ 3 times higher than the amplitude of the video signal; (2) low frequency interference that is superimposed on the synchronization head; (3) Large area of high-frequency clutter interference. Interference waveform shown in Figure 1. Among the three kinds of interference signals, the pulse interference is the most