短波通信是波长在100米～10米之间，频率范围3兆赫～30兆赫的一种无线电通信技术。
... high frequency communication engineering 高频通信工程 high frequency communication 短波通信 high frequency current 高频电流 ...
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...南大学学报（自然科学版、英文版） 关键字: 短波通信；频谱感知；数字信道化；循环谱特征[gap=1221]Key words: HF communication; spectrum sensing; digital channelized; cyclic-feature...
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But the performance of HF-communication is seriously influenced by the bad channel conditions.
但是短波信道的恶劣特性,严重影响了短波通信的性能。
参考来源 - 短波信道均衡算法研究Second part : Recommend the short wave communication system to be designed overallly.
第二部分：介绍短波通信系统总体设计。
参考来源 - 短波通信数据传输编码的研究As a important method for middle or long distance wireless communication, short-wave communication gains its recognition over again, for its long-distance and anti-destroy capability. But now more advance performances are expected.
短波通信是中远距离无线通信的一个重要方式，由于通信距离远、抗打击能力强、设备简单等优点在近年来重新受到重视。
参考来源 - 短波单边带软件无线电DSP模块的研制·2,447,543篇论文数据，部分数据来源于NoteExpress
因此短波通信的主要传播路径是天波。
The sky wave is the major transmitting way of short-wave communication.
分析短波通信的特点，了解单边带调制的相关特性；
Present the SSB modulation and some characters of HF communication.
在短波通信中，极低信噪比条件通信是一种应急通信手段。
In high frequency communication, extremely low SNR communication is an expedient means.
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