High Alphabet modulation is a new modulation method, which is very suitable for safetyremotecontrol 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 safetyremotecontrol 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.
The dissertation discusses three problem of remotecontrol system: the problem of real-time , the problem of safety and the problem of reliability, and gives some solution of them.