Present the SSB modulation and some characters of HF communication.
分析短波通信的特点，了解单边带调制的相关特性；
The mapping relation can be used to predict the critical frequency and the HF communication channel.
人工神经网络的映射能力是人工神经网络理论研究中最重要的问题之一。
It has important significance to recognizing HF communication and frequency agile radar on theory and essence.
这对从理论上认识跳频通信和捷变频雷达跳频码的本质，具有重要的理论意义。
The domestic research on third generation HF communication came late and most of the HF radio stations are based on second generation.
我国第三代短波通信的研究刚刚起步，国内的短波通信系统大多基于第二代短波通信标准。
In modern HF communication, burst communication is applied to improve such performances as anti - interference and anti - interception etc.
在现代高频通信中，为了提高抗干扰与抗截获性能，使用了突发通信模式。
Due to the flexibility and the ability of long distance transmission, HF communication plays an important role in the fields of military communication.
短波通信具有的机动灵活和通信距离远等特点，使得它在军事通信中具有十分重要的地位。
Although narrowband models of the HF channel have existed for many years, with the development of the HF communication they are not applicable to the complex wideband HF channel conditions.
尽管短波窄带信道模型已经诞生了几十年，但是随着短波通信向宽带化发展，它已经不能适应复杂的短波宽带信道条件。
By analysis and summarization of HF aeronautical communication site setup, a mathematical model based on month median about REL is proposed, and then with VOACAP, the mathematical model is verified.
在对短波航空通信站点设置进行总结和分析的基础上，建立以月中值为基础的REL数学模型，并采用VOACAP对所提出的数学模型进行了验证。
In the engineering applications of short-range HF no-blind zone communication, analyzing the propagation modes and characteristics of electromagnetic wave plays guidance role to engineering practice.
分析近距短波无盲区通信的电波传播方式及性能，对指导工程实践具有重要的意义。
It's a new method to design digital AGC of HF digital communication system based on DSP.
讨论了短波数字通信中数字agc的特殊性与DSP实现方案。
This paper presents a new HF frequency hopping communication system which is called correlated hopping enhanced spread spectrum (CHESS).
本文介绍了一种新型的短波跳频通信系统CHESS系统。
HF radio communication has a significant communication blind zone in the range of 200 kilometers usually. This disadvantage restricts its application in the near range tactical mobile communication.
短波无线电通信在200公里范围内通常存在着盲区，这一特点制约了其在近距机动通信中的应用。
The simulation results show that the HF TDLs communication based on multitone parallel transmission can avoid narrowband jamming effectively such as multitone jamming.
仿真结果表明，基于多音并行体制短波战术数据链通信使用该方法能够有效躲避多音等窄带干扰。
The communication simulation model of HF multitone parallel transmission is established, and the anti-jamming performance of narrowband and broadband is analyzed based on the model.
论文建立了短波数据链多音并行体制的通信仿真模型，在此模型的基础上分析研究了其抗窄带干扰和宽带干扰的性能。
The Frequency Shift Keying modulation is widely used in HF digital communication.
控是短波数字通信中常用的一种调制方式。
Finally, the method is applied to the measured data, and the results show that the proposed method is effective in HF-communication interference mitigation.
对实测数据的处理结果表明，该方法能有效地抑制高频通信干扰。
Finally, the method is applied to the measured data, and the results show that the proposed method is effective in HF-communication interference mitigation.
对实测数据的处理结果表明，该方法能有效地抑制高频通信干扰。
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