摘要
短波广播信号穿透力强、不易干扰,短波覆盖距离远、面积大,具有无国界远距离覆盖的特性,至今仍被普遍认为是大规模全球传送的最有效手段,且短波传输覆盖安全、便宜、快捷。因此,短波广播是世界各国进行文化交流、舆论宣传的重要手段。短波信号传播信道的媒介是电离层,电离层特性随时间、季节、地理位置及太阳黑子周期等而变化,研究短波传播影响因素对于实现短波覆盖精准化、提高播出效率、合理利用短波发射资源具有重要意义。
Short--wave broadcasting signal has strong penetrability and is not easy to interfere.And it has a long coverage distance and a large coverage area,and has the characteristics of borderless long-distance coverage.So far,it is still generally considered as the most effective means of large-scale global transmission,and short-wave transmission coverage is safe,cheap and fast.Therefore,short-wave broadcasting is an important means of cultural exchange and public opinion propaganda all over the world.The medium of the short-wave signal transmission channel is the ionosphere.The characteristics of the ionosphere vary with time,season,geographical location,sunspot cycle,etc.It is very important to study the factors affecting short-wave propagation for realizing the accuracy of short-wave coverage,improving broadcasting efficiency,and rationally using short-wave transmission resources.
作者
海霞
Hai Xia(Academy of Broadcasting Science,NRTA,Beijing 100866,China)
出处
《广播与电视技术》
2022年第12期113-115,共3页
Radio & TV Broadcast Engineering
基金
2021年度广科院基本科研业务费项目“短波调度精准化方法研究项目”资助
关键词
短波传播
电离层
影响因素
Short-wave propagation
Ionosphere
Influencing factor
作者简介
第一作者:海霞(1978—),女,国家广播电视总局广播电视科学研究院高级工程师,本科。主要从事广播电视公共服务、广播电视频率规划、电磁兼容等方面的研究,曾参与过广电总局《十三五推进基本公共服务均等化规划总结评估与十四五公共服务规划编制》《中波、调频、电视频率规划研究》《米波段数字音频广播及调频广播业务与航空无线电业务电磁兼容研究》等重大项目。
