卫星数字电视信号干扰检测与预警实现  

The Interferential Detection of Satellite DTV Signal and Alarm Implementation

作　　者：王祺[1] 于鸿洋[1] 

机构地区：[1]电子科技大学,四川成都610054

出　　处：《中国有线电视》2006年第2期179-182,共4页China Digital Cable TV

摘　　要：随着数字通信技术的发展,广播电视由模拟向数字化全面过渡。卫星数字广播具有诸多优点,受到世界各国的广泛重视,同时也成为不法分子的攻击对象。新型专业卫星数字电视解码器(IRD)通过运行防止非法信号干扰的软件,实时分析卫星数字电视信号的特征,从而提前发现外来非法干扰信号并实施预警。分析卫星数字电视信号在受干扰过程中的信号特征,然后根据此特征提出对恶意干扰进行预警的一种实现算法。With the development of digital science and technology, analog broadcast is being replaced by digital broadcast little by little. As it has a good many advantages, satellite digital broadcast was got more attention in many countries. At the same time, satellite digital broadcast is attacked by illegal interfering signal. New type of professional IRD, by running the software for preventing the illegal interfering signal, IRD analyzes the characteristic of satellite DTV signal in real time, then found external illegal interfering signal in advance and gives the early alarm. The paper firstly analyzes the characteristic of satellite signal in the process while the satellite DTV signal is being interfered, and then presents a kind of algorithm for early alarm implementation according to this characteristic.

关 键 词：IRD 卫星信号 数字电视 非法干扰 

分 类 号：TN943.3[电子电信—信号与信息处理]