very high frequency communication 中文意思是什麼

very high frequency communication 解釋
甚高頻通信
  • very : adv 1 〈用於修飾形容詞、副詞或分詞〉很，甚，頗，極，非常。2 〈與否定詞結合〉（不）怎樣，（不）大...
  • high : adj 1 高的〈指物，形容人的身高用 tall〉；高處的；高地的。2 高級的，高等的，高位的，重要的。3 高尚...
  • 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。
  • 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. Very high frequency communication

    甚高頻通信
  2. 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。
  3. This paper deals with problems of high accurate estimation of carrier frequency offset which is widely used in communication signals synchronization and frequency measurement. therefore, it ' is very importance for interception and location of signals

    通信信號載頻偏差的高精度估計廣泛應用於通信信號的同步和頻率測量當中，因此，對于信號的截獲和定位具有非常重要的作用。
  4. Icao make a standard of very high frequency data link mode 4 ( vdl mode 4 ) on the basis of self - organizing time division multiple access ( s - tdma ), this standard is considered to be one of the basic solutions of aviation mobile communication

    該標準基於自組織時分多路訪問技術，其主要特點是:支持實時應用，採用短消息進行信息交換，並且可以在缺少地面基礎設施的情況下保障空空通信。
  5. " the atis and volmet systems installed at the hong kong international airport ( hkia ) have been upgraded with datalink capability and dedicated digital communication links have been set up with the sita aircom service to enable airlines to access hong kong atis and volmet service via both very high frequency ( vhf ) and satellite datalink, " he said

    在香港國際機場裝置的自動航站情報和遠航氣象情報系統已加添數據鏈路應用功能，而專用的數據化通訊連接網路亦已透過國際航空電訊公司提供，讓航空公司能利用高頻通訊或衛星數據鏈路，獲取香港自動航站情報服務和遠航氣象情報服務。
  6. The underwater acoustic channel is very complex where cochannel interference, doppler frequency offsets, narrow bandwidth and time and frequency selective deep fades obstructs the development of high speed and fidelity underwater data transmissions. thus projects of high speed and fidelity underwater signal transmissions become a hotspot in the fields of world academic circles. the conventional serial communication must use adaptive equalizer to combat the multipath in real - time

    海洋水聲通道是一種極其復雜多變的時-空-頻變參通道，其通道窄，強多途干擾，信號起伏衰落嚴重，一直是水下信息可靠高速傳輸的主要障礙，因此如何在水聲通道中高速率準確地傳輸數據，就成為世界性的熱門課題。
  7. Because of enabling to provide high - rate and high - quality wireless and mobile communication service, orthogonal frequency division multiplexing ( ofdm ) system is becoming a very hot research topic recently, and it is especially one of the technical difficulties to estimate and equalize the time - varying ( tv ) dispersive channels

    在移動無線通信中，由於能提供高速率和高質量的通信服務，正交頻分復用（ ofdm ）技術成為當前國際上的研究熱點，而時變色散通道的估計和均衡問題是其中的技術難點之一。
  8. 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。
  9. It has been used in the powerful areas for many years. in these areas, it ’ s a very important communication mode to transmite voice, datas and telecontrol signal by the plcs using lower frequency through the power lines which are high than 10kv

    電力線通訊並不是什麼新技術，早在數十年前就已經在電力系統的使用。在中高壓線路上（ 10kv以上）上通過電力線載波機使用較低的頻率（ 40khz 500khz ）傳輸語音、數據和遠動信號，是電力部門一種重要的通訊方式。
  10. 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術是在戰時強電磁干擾情況下能實現保證最低限度的數據報通信的一種抗干擾通信技術。由於其能有效的克服極低信噪比、較強的窄帶干擾和幾十毫秒的多徑，在信息戰中受到各軍高度重視。
  11. During the last century, the vhf ( very high frequency ) communication has been applied in the ship ' s transportation, as well as radar and arpa also could identify ships in the marine. but they could n ' t adapt to the needs of the modern navigation because of their limits. the rapid development of the digital communications technology, computer technology and net ware technology supports the needed technology of ais ( automatic identification system )

    上個世紀， vhf通信技術被廣泛地應用於船舶通信；雷達、 arpa具有識別船舶的功能，但是由於自身的局限性而無法適應現代航運安全的需求；隨著數字通信技術、計算機技術以及網路信息技術的飛速發展， ais的技術基礎已經搭建好，在航運界對助航設備的要求越來越高的情況下，船舶自動識別系統應運而生。
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