区域短波通信台网选频的研究
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摘要
河南省地震局短波通信台网的工作频率被限制在短波的低频段 ,受干扰严重 ,中心台又位于市中心 ,环境噪声电平很高 ,加之 ,局网内可用的电台大部分发射功率小、抗干扰性能差。这些因素给通信台网的工作频率选择带来困难。为提高区域通信的质量 ,在对短波电离层信道传播特性进行分析的基础上 ,结合本地大气噪声和环境噪声的实际情况 ,对河南省地震局通信网的选频问题进行了研究 ,给出了选频的原则和方法 ,介绍了选频试验的结果和体会
The working frequency is restricted to low frequency band for the short- wave communication network of Seismological Bureau of Henan Province.Itis difficult to selectthe working frequency for communication network due to the high environmental noise,low emissive power and low anti- noise feature of communication equipment.Based on the analysis of short- wave transmission specialty in ionosphere and local noise caused by atmosphere and environment,the study on short- wave frequency selection for regional communication station was made.In this paper,the principle and method for frequency selection are given.The result and the experience in frequency selection practice are introduced also.
引文
[1] 邮电部北京设计院,邮电部上海设计院.电信工程设计手册[M].北京:人民邮电出版社,1991.50-76.

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