frequency hopping spread spectrum 中文意思是什麼

frequency hopping spread spectrum 解釋
跳頻擴頻
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  • hopping : adj. 1. 忙碌的，繁忙的。2. 從一處到另一處的；到處奔忙的。
  • spread : vt （spread）1 伸開，伸長（手臂等），展開，張開（帆等），打開（地圖等）；鋪開（氈子等），展寬，展...
  • spectrum : n. （pl. -tra ）1. 【物理學】譜，光譜；波譜；能譜，質譜。2. 【無線電】射頻頻譜；無線電（信號）頻譜。3. 【心理學】（眼睛的）余像；殘像。4. 〈轉義〉范圍，幅度；（連續的）系列。
  1. 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。
  2. To improve anti - jamming technique by spread spectrum close to monochromatic frequency, so that enhance the ability of anti - active - jamming and anti - passive - jamming, anti reconnaissance, anti - radiation missile, anti - stealth, by means of multi frequency spread spectrum and hopping spectrum instead of mono - frequency spread spectrum, realizing strong processing system for anti - interference signal, providing the method of generating of chirp signal and corresponding matched filter system

    摘要為改進線性調頻雷達系統所採用的在單色頻率點附近擴譜抗干擾技術，加強制導雷達站具備抗有源、無源干擾，反偵察，抗硬殺傷的反幅射導彈和反隱身的能力，通過將單頻點擴譜改為多頻點擴譜跳譜，實現了高抗干擾信號處理系統，給出方案中在中頻段實現的線性調頻信號產生方法以及對應的匹配濾波處理系統。
  3. Frequency hopping spread spectrum

    跳頻展頻技術
  4. In addition, hybrid spread - spectrum communication system is propitious to enhance anti - jamming performance of the system that is make up of direct sequence ( ds ) and frequency hopping ( fh ), and it can satisfy the require of anti - jamming of systems. it concentrate their virtue and overcome shortage in single spread spectrum style. this paper discusses the aspect in detail

    另外，將擴頻技術中應用最廣泛的兩項技術直序擴頻（ ds ）和跳頻（ fh ）結合在一起，構成混合擴頻通信系統，有利於提高系統的抗干擾性能，更能滿足系統抗干擾的要求，而且將跳頻系統和直擴系統的優點集中起來，克服了單一擴頻方式的不足。
  5. Spread spectrum communication technology can be classified into four catalogs : direct sequence spread spectrum, frequency hopping, time hopping and chirp

    擴頻技術種類較多，主要包括直接序列擴頻、跳頻、跳時和線性調頻。
  6. Frequency hopping spread spectrum fhss

    跳頻擴頻
  7. Ss - ffh distribution automation using distribution line carrier systems - part 5 - 5 : lower layer profilers - spread spectrum - fast frequency hopping ss - ffm profile

    採用配電線載波的配電自動化.第5 - 5部分:低層協議集.快速跳頻擴頻通信
  8. The system completes anti - jamming function of frequency - hopping ( fh ) and direct sequence spread spectrum ( ds - ss ) by exploiting dsps + fpga structure, so it is flexible and modular

    它採用dsps + fpga的結構，實現跳頻擴頻和直接序列擴頻的抗干擾功能，因而結構靈活，適于模塊化設計。
  9. To assure that the hybrid ds - fh spread - spectrum communication mode has better capability of information safety and inference suppression, i bring forward a design scheme of ds - fh spread - spectrum communication system and solving effectively the crucial problem such as how to choose the user address, how to choose the hopping frequency and how to avoid the collision of the frequency which is used by different users at the same time

    為保證系統可靠、有效地工作，本文提出了一種ds - fh混合擴頻系統的設計方案，並且有效地解決了系統的用戶選址、頻率選擇和頻率碰撞等關鍵問題。通過系統設計模擬證實了ds - fh混合擴頻系統具有優于ds系統的抗干擾性能，並在一定程度上提高了系統的抗遠近效應能力。
  10. 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 / vhf ( high frequency / very high frequency ) frequency - hopping radios in military has greatly enhanced the ability of military equipments against jamming and interception and ensure the safety and validity of chain of military command

    跳頻技術是擴頻技術的一種，是80年代以來出現的一種新的通信方式。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超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，保證了軍事指揮系統的安全和有效性。
  11. In this chapter, we began with the mac - layer and then briefly explained the three types of ieee 802. 11 physical ( phy ) layers ( frequency hopping spread spectrum ( fhss ) physical layer, direct sequence spread spectrum ( dsss ) physical layer and infrared ( or photonic ) physical layer )

    本章從mac層開始，簡要解釋了三種類型的ieee802 11物理層：跳頻擴譜（ fhss ）物理層、直接序列擴譜（ dsss ）物理層、紅外（或光子）物理層。
  12. In chapter three, the theory of particular anti - jamming technologies are analyzed, especially the spread spectrum ( ss ) is one of the most important anti - jamming technologies, including direct sequence spread spectrum ( dsss ), frequency hopping spread spectrum ( fhss ) and other improved technologies

    第三章研究了時域、頻域、功率域多種抗干擾技術的抗干擾機理和定量描述抗干擾能力的方法，其中擴展頻譜技術是主流的抗干擾技術，包括直接序列擴頻和跳頻技術以及它們的改進方案。
  13. It has been proven that the spread spectrum technologies have good capabilities of overcoming isi in electromagnetic wireless channel. the feasibilities of their applications to underwater acoustic channel have been analyzed, the frequency hopping technology is chosen. instead of using time - frequency diversity, convolutional coding and viterbi decoding are employed to combat signal fading, consequently the bit - rate and bit - error - rate performance of the underwater acoustic voice communication system can be balanced and controlled

    由於擴頻技術在抗碼間干擾方面具有優良的特性，因此在分析了各種擴頻技術于本研究應用的可行性之後，確定了跳頻技術作為具體實現方案；在克服幅度衰落方面，選用卷積編碼和維特比譯碼方法來替代原有的分集技術以綜合調節系統的通信速率與誤碼性能，達到差錯可控的目的。
  14. By analyzing the spectrum feature and correlation feature of walsh sequence, we find that it has the spectrum feature of ds / fh ( direct spread / frequency hopping ) communication mode

    我們分析了walsh函數序列的頻譜特性和相關特性，結果表明，該序列具有ds fh （直擴跳頻）的頻譜特性。
  15. A new hybrid spread - spectrum ( ds - fh ) communication mode is discussed in detail in this paper, walsh sequence is used as frequency - hopping sequence in this mode

    本文將討論一種新型的ds - fh混合擴頻通信系統。在這種系統中，使用walsh函數序列作為跳頻序列。
  16. Ss - ffh distribution automation using distribution line carrier systems - lower layer profiles - spread spectrum - fast frequency hopping ss - ffh profile

    使用配線配電線路載波系統的配電自動化.低層輪廓.擴展譜帶快速跳頻
  17. Ss - ffh distribution automation using distribution line carrier systems - part 5 - 5 : lower layer profiles - spread spectrum - fast frequency hopping ss - ffh profile

    使用配線載波系統的分配自動化.第5 - 4部分:低層輪廓.擴展譜帶快速跳頻
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