hf communication 中文意思是什麼

hf communication 解釋
高頻通信；短波通信
  • hf : Hf ＝ 【化學】 hafnium.
  • communication : n. 1. 通訊，通知；交換；信息；書信，口信，通報。2. 傳達，傳授；傳播；傳染。3. 交通，交通機關；聯系，連絡（設備）。4. 【宗教】接受聖餐。
  1. The ionosphere is a complex medium, which is aeolotropy, asymmetry, dispersive and changes randomly with time. in order to improve the communication quality of the shortwave that depends on the ionosphere, we should have aknowledge of the current condition of the ionosphere in real time. the backscatter sounding of high frequency can diagnose the real - time channel characters for shortwave communication or hf radar, which is great assistant to shortwave communication and hf radar

    電離層是隨機時變，各向異性，非均勻、色散的復雜介質。為了保證依賴于電離層進行的短波通信質量，必須了解電離層的實時狀態信息。高頻返回散射探測可以實時監測與短波通信或高頻天波雷達相關的天波傳播通道的狀態，對短波通信和天波雷達工作起了重要的輔助作用。
  2. Major products and services of the company cover satellite communication equipment, mobile communication products, hf communication system, ctv sets, personal digital entertainment products, electronics manufacturing, instruments and meters, production equipment, software services and system integration

    公司主要產品和服務包括：衛星通信設備移動通信設備短波通信設備彩電個人數碼娛樂產品電子製造儀器儀表大生產裝備軟體服務系統集成等。
  3. The frequency shift keying modulation is widely used in hf digital communication

    移頻鍵控是短波數字通信中常用的一種調制方式。
  4. Dsp key technique in hf software radio communication system

    軟體無線電的關鍵技術及實現
  5. General specification for ground equipment of hf ssb air - ground communication. part 1 : technical specification for hf ssb equipment

    短波地空通信地面設備通用規范.第1部分：短波單邊帶設備技術要求
  6. Chapter 1 introduces the extensive application of hf / vhf communication and hf / vhf radios in military field, and points out the significance for promoting the research work of fh communication countermeasure using modern signal processing techniques, especially time - frequency analysis

    第一章介紹了短波通信和短波跳頻電臺在軍事領域中的廣泛應用，以及現代信號處理技術特別是時頻分析技術對促進跳頻通信對抗研究的重要意義。
  7. 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

    跳頻通信具有良好的抗干擾性，低截獲概率及組網能力，因此跳頻技術的一出現，便在軍事領域得到了極大的發展，採用跳頻技術的短波電臺在軍事通信中得到了廣泛應用，極大地提高了軍事裝備的抗截獲和抗干擾能力，向通信對抗提出了嚴峻的挑戰。
  8. Design of a novel automatic antenna tuning coupler in hf communication

    一種新的短波自適應天線調諧器的設計
  9. Application of rtce in adaptive hf maritime communication system, can improve quality of communication and enhance link rate of communication

    海上高頻自適應通信系統中實時選頻技術的應用可以改善海上短波通信的通信質量和提高通信可通率。
  10. According to the designing requirement of hf channel characteristics and combining with the 3rd generation ale ( 3g - ale ) technology, this paper proposes a new hf link protocol, using tdma mode. and this new protocol supports communication in large scale area. this protocol work in synchronization

    本文結合第三代短波自組織網鏈路建立（ 3g - ale ） [ 1 ]技術和短波通道特點提出了一種適用於節點大范圍地理分佈、全網同步工作和採用tdma工作模式的短波自組織網鏈路層協議。
  11. Mtcem ( multi - tone envelope method ) can accurately forecast performance parameters on a set of stored channel and directly decide usable frequency choice. as hf channel characteristic is closed to gauss, mtcem may be simplified to multi - tone envelope method rtce system. for certain user ' s request and link status, double tone complex envelope method rtce, double tone envelope rtce, adaptive hf channel sounding and communication system, all that can easily derived from mtcem

    多音復包絡實時選頻系統，當通道特性近似於高斯通道時，整個系統可以簡化為多音包絡法實時選頻系統，針對不同的用戶要求和電路通道狀況，很容易由它派生出較為簡單的系統，如雙音復包絡法實時選頻系統，雙音包絡法實時選頻系統，短波自適應通道探測和通信系統。
  12. At the same time, as more and more radio sources have been set up, electromagnetic pollution in urban area becomes more serious, which is harmful to people ' s healthy and communication system so it is necessary to simulate the electromagnetic propagation in urban area by computer being an approximate hf method in evaluating em scattering ， the complex ray method （ crm ） is valuable in actual applications ， mainly benefited from its simple physical model ， convenient mathematical formulation and computational efficiency, especially with the scenes of scattering from complex objects based on the condition mentioned above, a hybrid ray model of the urban area electromagnetic wave propagation prediction was established with the foundation of ray tracing theory and complex ray theory

    復射線技術作為一種求解波場問題的高頻近似方法，由於其具有物理模型簡單、數學處理方便、計算效率高等優點，在復雜的目標散射特性分析等應用領域中有著重要的應用價值。基於以上的情況，本文在射線追蹤理論和復射線理論的基礎上，為城區環境建立了混合射線預測模型。本文採用橢圓模型對已有的射線追蹤方法進行加速，並將復射線理論應用到城區環境電波傳播預測中，提出新的預測方法混合射線方法。
  13. Communications between satellite communication network and hf uhf communication networks

    超短波通信網路的互連
  14. Chapter 1 introduces the extensive application and general developing condition of hf / vhf communication and hf / vhf radios in military field

    第一章介紹了超短波通信和超短波跳頻電臺在軍事領域中的廣泛應用及其發展概況。
  15. In recent years, hf adaptive communication system has become a popular way

    近年來，短波自適應通信成為短波通信的發展主流。
  16. As a traditional communication technique, hf communication is an important way in civilian and military communication systems

    短波通信技術作為一種傳統的通信技術，一直是軍用民用通信系統中的重要手段。
  17. In this paper, we clarify the importance of hf radio networking in hf communication, and some technologies in the hf radio networking application abroad

    本文首先闡述了短波組網在短波通信中的地位，然後對國外在短波組網方面的技術進行了綜述。
  18. This paper mainly deals with dsp realization of data transmission of good reliability in hf and vhp communication system

    本論文研究了使用數字信號處理（ dsp ）技術在短波、超短波通道上實現高可靠性的數據傳輸。
  19. Secondly, a protocol design of transmission control of data link layer is introduced. the protocol can be applied in hf and vhp communication

    二是設計了一種數據鏈路層的傳輸協議，並用dsp實現，可以應用於短波、超短波通道的數據傳輸。
  20. Ale system military standards include a highly robust signaling system, a extendable protocol system, multiple address modes, multiple rtce ( real - time channel estimation ) modes and open system structure, in order to offer advanced hf communication network function

    Ale系統軍用標準包括一個高度穩健的信令系統、可擴展的協議系統、多種尋址方式、多種rtce （ real - timechannelestimation ）模式以及開放的結構，以支持高級的短波通信網路功能。
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