hf(high frequency) meaning in English
高频
Examples
- By its super long life , hf ( high frequency ) electrodeless light establishes a separate sect in family of lights
高频无极灯以其6万小时的超长寿命在照明家族独树一帜。 - Othr ( over - the - horizon radar ) is a kind of hf ( high frequency ) radar with great expectation , which has arisen great concern worldwide because of its large coverage , anti - stealth character and so on
超视距雷达( othr )是一种具有较大发展前景的高频雷达，以其覆盖距离远、覆盖面积大和抗隐身等优良特点受到各国学者的广泛关注。 - In hf ( high frequency ) radar , the targets detected based on the spectrum processed by the two - dimension fft are peak - like , which makes the operator distinguish them from the clutter and background noise easiler in the 3d ( three - dimension ) display than the 2d
特别对于距离分辨力低的高频雷达系统,其探测的目标通常近似为点目标,在经二维傅立叶变换得到的频谱数据上呈现峰状结构。 - Frequency - hopping ( fh ) is a novel spread spectrum communication technique , which develops very fast in military field due to its lpi / lpd ( low probability of intercept / detection ) properties and immunity against interferences , the extensive application of hf ( high frequency ) frequency - hopping radios in military has greatly enhanced the ability of military equipments against jamming and interception and brought up a new austere challenge for communication countermeasures
跳频通信具有良好的抗干扰性，低截获概率及组网能力，因此跳频技术的一出现，便在军事领域得到了极大的发展，采用跳频技术的短波电台在军事通信中得到了广泛应用，极大地提高了军事装备的抗截获和抗干扰能力，向通信对抗提出了严峻的挑战。 - The technology of very low bit rate for hf ( high frequency ) communication means that , one technology of ecm ( electronic counter measures ) resistant communication is developed for low bit data message exchange in the time of battle which data communication is destroyed by electronic disturber . it is regarded by armies in the battle of information , because that it can overcome the very low snr ( signal noise ratio ) , very high narrow - band interference and multipath with maxium delay of fifty millisecond
短波最低限度通信技术是在战时强电磁干扰情况下能实现保证最低限度的数据报通信的一种抗干扰通信技术。由于其能有效的克服极低信噪比、较强的窄带干扰和几十毫秒的多径，在信息战中受到各军高度重视。