甚低频发射系统同步调谐研究  

Synchronization Tuning of VLF Transmitting System

作　　者：金国庆[1] 董颖辉[1] 

机构地区：[1]海军工程大学电子工程学院,湖北武汉430033

出　　处：《现代电子技术》2011年第10期82-84,共3页Modern Electronics Technique

基　　金：国家"863"计划资助项目(2009AAJ111)

摘　　要：甚低频通信受发射天线固有带宽限制,信息速率低,为了提高甚低频通信速率,采用了不同于载频调谐的同步调谐方法,理论上分析并计算了在不同信息速率下甚低频发射机载频调谐系统和同步调谐系统的输出信号谱及信号传输效率。结果表明采用同步调谐可使天线系统在固有带宽不变的条件下提高了甚低频发射天线系统的有效带宽,从而提高了甚低频通信系统的信息传输速率和传输效率。Very low frequency communication is limited by the transmitting antenna bandwidth, whose symbol rate is very low. In order to improve VLF symbol rate, a synchronization tuning method different from carrier frequeney tuning is used. The spectrum for output signal and transfer efficiency for signal of VI.F transmitting system and synchronous tuning system under the carrier frequency tuning system are analyzed. The results indicate that the synchronous tuning method can improve the antenna＇s effective bandwidth under the invariable inherent bandwidth, so as to increase symbol rate and transfer efficiency of VLF communication system.

关 键 词：同步调谐 甚低频 传输效率 MSK 

分 类 号：TN822.134[电子电信—信息与通信工程]