fh 中文意思是什麼

fh 解釋
FH, F. H. ＝ fire hydrant 消防栓，消防龍頭，滅火龍頭。

  1. It was found that they were fit for the lpi applications. on the digital signal processing, we studied the demand on compute ability for fast acquest. we designed a new signal form named ds - fh - th signal which costs less in processing but without any lost on the lpi performance

    在信號的數字處理方面，分析了直接序列擴頻雷達在信號捕獲階段對計算能力的要求，在不降低系統lpi性能的基礎上，設計了ds - fh - th雷達信號，降低系統對計算能力的要求。
  2. Then h is generated by b. ( 6 ) derfh = adh ( h + fh ) ( addi ) 3vi 1 ), ( 7 ) let gs be the derivation algebra of lie superalgebra 5 on f and charf = 3

    （ 5 ）設，則h由集合b生成（ 6 ）其中h型模李超代數的導子代數的維數為（ 7 ）設g _ s是f上的李超代數s的導子代數
  3. And more, a computer simulation has been made and the results indicate the validity of part time - resident interference under the certain ratio of jamming - to - signal time - resident, consequently, it may provide concerned methods for countermining fh communication systems

    進一步進行了模擬與分析，結果表明在一定干信駐留時間比情況下，部分駐留時間干擾的有效性，從而為針對跳頻通信系統進行對抗提供相關方法。
  4. Implementation of an l - band fh signal generator

    波段跳頻信號源的設計與實現
  5. This paper makes a thorough study of fh electric company

    本文樣本為fh民營電氣公司。
  6. Research of chaotic fh sequences generated by combined map

    混合映射混沌跳頻序列的研究
  7. The second part provides a profile of fh company

    第二部分是對fh公司家族治理情況的介紹。
  8. Optimal jamming of fh synchronous signals

    跳頻同步信號的最佳干擾
  9. The synchronization problem research of ofdm in fh communication system

    在跳頻通信系統中的同步問題研究
  10. A jamming rejection method for fh system based on adaptive antenna

    基於自適應天線的跳頻系統干擾抑制方法
  11. The aim of this paper is to design the baseband circuit of a ds / fh system

    本論文主要是設計一個跳擴頻（ ds fh ）系統基帶電路。
  12. Alreadyx inyour home ay e best veft alone, to avoi fh d releasing asbestos fibres

    已經在你家，最好是獨留家中，以避免釋放石棉纖維。
  13. Chapter 3 discusses the modules used in the fh - mpsk and fh - / 4dqpsk systems. these modules include : duc / ddc ( digital up converter / digital down converter ), nyquist flitter, burst start detection, interpolation module, pll ( phase locked loop ), pll error extraction, initial phase correction and the coding and decoding for tcm

    第三章主要討論了跳頻模式下fh - mpsk和fh - 4dqpsk系統中各個模塊的設計，這些模塊包括：上下變頻器、奈奎斯特濾波器、信號到達檢測、插值模塊、通用環路、各環路誤差提取方法、初始相位校正和tcm編譯碼。
  14. Intermodulation suppression for fh ( frequency hopping ) receiver is designed by selecting the intermediate frequencies and changing group of filters, local oscillation ( lo ) frequency, bandwidth of lo frequency under the condition that receiver configuration, sensitivity, dynamic range, instantaneous bandwidth and precision of frequency measurement are fixed

    摘要針對跳頻接收機的體制和靈敏度、動態范圍、瞬時工作帶寬、測頻精度等設計參數，通過改變預選器組成、本振頻率和本振帶寬，分析接收通道的中頻選取原則，以實現跳頻接收機的互調抑制設計。
  15. So researching the surveillance, interception and classification methods for fh signals has been a difficult and pressing task in communication countermeasure fields

    開展對跳頻通信對抗的研究，尋求截獲，分選識別跳頻通信信號方法，已成了當前通信對抗領域緊迫而困難的任務之一。
  16. This thesis includes researches on the design of communication countermeasure federation, implementations of constant frequency and fh ( frequency hopping ) communication countermeasure federations

    本文的研究內容分為三個部分:通信對抗聯邦設計、定頻通信對抗聯邦實現以及跳頻通信對抗聯邦實現。
  17. 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。
  18. 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。
  19. Modern military tactics cooperativity communication raises many new requirements including multi - mode, multi - band, and expandable performance, etc. so, developing new fh station has important sense in military strategy

    現代戰術協同通信也對軍用電臺提出多模式、多速率、可擴展等許多新的要求。因此，研製新型跳頻電臺具有十分重要的戰略意義。
  20. The methods of measurement for monotone and dual tone intermodulation suppression are provided as receiver works at fh mode based on intercept probability and false alarm probability are up to par

    提出在滿足截獲概率和虛警概率條件下，接收機跳頻工作方式的單音和雙音互調抑制性能測試方法。
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