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处在电子对抗环境中的卫星数字通信系统,对其敏感的通信内容(如上行遥控指令),必须通过密码技术加密。本文概略介绍几种现行的密码通信方式并讨论某些实际应用问题。其中用随机密钥流实现的同步密码方式,最适合空间应用。差错控制技术已成为现代数字通信系统设计中必不可少的组成部分。它不但是提高数据传输可靠性的最经济手段,而且与其它反电子对抗技术结合使用,能够提高这些技术的应用效果。本文从工程应用出发,介绍几种实用的检错编码和纠错编码及其应用实例,最后给出选择差错控制方案的基本考虑原则
Satellite digital communications systems in an electronic warfare environment must be cryptographically encrypted for their sensitive communications (such as uplink remote control instructions). This article gives an overview of several current ways of communicating with passwords and discusses some practical application issues. Among them, the synchronous password method realized by random key stream is most suitable for space application. Error control technology has become an integral part of modern digital communication system design. It is not only the most economical way to improve the reliability of data transmission, but it can also be used in combination with other anti-electron countermeasures to improve the effectiveness of these technologies. Based on the engineering application, this paper introduces several practical examples of error detection coding and error correction coding and its application. Finally, the basic considerations of selecting error control schemes