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一、概述 电力系统远方信息数字化传输于七十年代问世以来有了较大发展.远距离传输业经编码的数字信息,有一个必不可少的环节,即同步。 远动信息通常由一串具有相同持续时间的相继码元传递的。接收时,必须在成功率,可靠率最高的取样时刻进行取样判决。这首先需要知道每个码元的起止时刻,在实际传输中,常常若干码元组成一个字,若干字组成一帧。而每个字传输的内容是双方约定其顺序不能任意更换;此外,为了提高传输的抗干扰
I. Overview Digital transmission of remote information in power system has been greatly developed since the advent of the seventies.There is an indispensable link in the transmission of encoded digital information over long distance transmission. Telematics information is usually delivered by a succession of consecutive symbols of the same duration. Receiving, must be successful in the sampling rate, the highest reliability of the sampling decision. This first of all need to know the starting and ending time of each symbol, in the actual transmission, often a number of symbols to form a word, a number of words to form a frame. The content of each word transmission is agreed by both parties that their order can not be arbitrarily replaced. In addition, in order to improve transmission interference