High Alphabet modulation is a new modulation method, which is very suitable for safety remote control aboard missile, launch vehicle, manned or unmanned spacecraft, etc.

主字母调制技术是一种新颖的调制方式，非常适合于导弹、运载火箭以及载人和不载人飞船的安全遥控。

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An L-band safety remote control system is introduced which is composed of three stations and one center in order to increase coverage and overcome the limit of earth curvature to intervisibility.

本文介绍一种L频段安控系统，它由“三站一中心”组成，用三站无线接力的方法来提高覆盖范围并解决地球曲率对通视的限制。

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The dissertation discusses three problem of remote control system: the problem of real-time , the problem of safety and the problem of reliability, and gives some solution of them.

分析了远程控制中的几个问题：网络的实时性问题、网络的安全性问题和网络的可靠性问题，并给出了一些探讨和解决方法的思路。

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