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卫星通信是军事通信的重要组成部分,在复杂电磁环境下,卫星通信的环境又是十分恶劣的,它容易受到敌方的侦收、干扰和攻击等威胁。文中重点对现代卫星通信系统中最常用的抗干扰技术——直接序列扩频技术和跳频技术的基本原理进行了研究分析,给出了简单的仿真结果并总结了这两项技术各自的特点。这两类技术的共同特点是信号的频谱在发送时得到了扩展,在接收方又恢复为原来的宽度。这两项技术是保证战争中己方通信畅通的关键技术,在军事通信中有着极为重要的意义。
Satellite communication is an important part of military communications. In complex electromagnetic environments, the environment for satellite communications is extremely poor. It is vulnerable to threats of detection, interference and attack by the enemy. This paper focuses on the most commonly used anti-jamming technology in modern satellite communication systems - direct sequence spread spectrum technology and the basic principles of frequency hopping technology are analyzed and analyzed, gives a simple simulation results and summarizes the respective characteristics of these two technologies . The common feature of these two types of technologies is that the spectrum of the signal is extended during transmission and restored to its original width at the receiver. These two technologies are the key technologies for ensuring unimpeded communications in the war and are of great importance in military communications.