一种高稳定度FSK调制解调方法及其性能分析  

A highs stability method for FSK modulation and demodulation and performance analysis

作　　者：张振川 王越先 何建文 

机构地区：[1]东北工学院

出　　处：《电讯技术》1991年第4期19-23,共5页Telecommunication Engineering

摘　　要：本文介绍一种高稳定度频移键控(FSK)调制解调方法,它的调制解调中心频率全部由晶体确定,其稳定度比传统的压控振荡器和锁相环实现方法提高3～4个数量级。当调制信号的任一逻辑电平在一个较宽范围内波动时,调制输出的FSK信号能够保持一个固定大小的频偏。作者用全数字TTL集成电路实现了这种调制解调器,并且在以电源线为介质组成的计算机通信网络中进行了成功的实验。In this paper, a high stability method for FSK modulation and demodula-tion is introduced. The slability of centre frequency for both modulation and demodu-lation are determined by crystals. It is 3～4 order of magnitude higher than thoseof the traditional method using VCOs and PLLs. When any logic value in modu-lation signal varies to a large extent, the fixed frequency shift in FSK signal main-tained. The authors have implemented several modulators and demodulators using alldigital TLL integrated circuits and used them successfully for experiment networkingin a power line computer network.

关 键 词：调制解调器 FSK 数字通信 

分 类 号：TN76[电子电信—电路与系统]