MHFCS has the capability to transform high Frequency (HF) communications worldwide and provides nations with the highest levels of global connectivity while enhancing their information security.
MHFCS有能力改变世界各国高频通信，为各国提供高水平连接，同时提高他们的信息安全。
Harris will supply Falcon II RF-5800H high-frequency (HF) radio systems for long-haul, beyond line-of-sight terrestrial communications.
Harris公司将提供FalconIIRF- 5800H长途高频(HF)无线电系统，具有超视距地面通信能力。
A reliable way to improve the quality of spiral pipe was the substitution of high frequency butt welding for HF lap welding.
高频对焊代替高频搭焊是提高中直径螺旋焊管质量的可靠途径。
The ratio of the low frequency to high frequency components in HRV power spectrum(LF/HF) fluctuates with the change in the sleep stages.
HRV频谱中低频和高频成分的比值（LF/HF）随着睡眠深度的变化而波动。
Owing to the decametric wavelength, the angular resolution of High Frequency Surface Wave OTH Radar (HF SWOTHR) is usually coarse especially when dimensions of antenna array are restricted.
由于工作在高频段，高频地波超视距雷达的角分辨力较差，尤其是当阵长受限时。
The classic analysis of high-frequency (HF) protection only takes account of the channel delay effect of HF signal, neglects the delay effect of electric traveling wave.
高频保护传统分析方法仅考虑高频信号在通道中的延时效应，没有分析电气量的行波延时效应。
In terms of operation frequency, RFID systems can be divided into four categories: low frequency (LF), high frequency (HF), ultra high frequency (UHF), and microwave.
根据工作频率来分，RFID系统可以分为低频，高频，超高频和微波四个波段。
This paper mainly fulfills realizing the real Time Channel Estimate (RTCE) Technology of adaptive High-Frequency (HF), which is one of the digital businesses.
本文主要完成数字化业务中的一项——高频自适应中实时信道估值技术(RTCE)的实现。
High frequency (HF) communications play an important role in the field of their communications because of their skywave propagation characteristics.
短波通信由于其天波传播特性，在通信领域具有其它通信手段无法替代的地位。
The ionosphere contamination imposing on the High-frequency(HF) radar echoes has to be suppressed since it severely degrades the detection performance of HF radar.
高频雷达回波信号受到电离层污染从而影响了雷达的探测性能，因此需要进行去污染处理。
High frequency band is a hostile electromagnetic environment. In this band atmospheric noise emitted by lightning in a short distance may badly affect HF GW radar's normal function.
高频段电磁环境恶劣，近区雷电在这一频段激发的天电噪声对HF -GW雷达的正常工作构成了严重干扰。
High frequency band is a hostile electromagnetic environment. In this band atmospheric noise emitted by lightning in a short distance may badly affect HF GW radar's normal function.
高频段电磁环境恶劣，近区雷电在这一频段激发的天电噪声对HF -GW雷达的正常工作构成了严重干扰。
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