空對地頻道 的英文怎麼說

中文拼音 [kōngduìdebīndào]
空對地頻道 英文
air-to-ground channel
  • 空 : 空Ⅰ形容詞（不包含什麼; 裏面沒有東西或沒有內容; 不切實際的） empty; hollow; void Ⅱ名詞1 （天空） s...
  • 對 : Ⅰ動詞1 （回答） answer; reply 2 （對待; 對付） treat; cope with; counter 3 （朝; 向; 面對） be tr...
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  • 道 : Ⅰ名詞（道路） road; way; route; path 2 （水流通過的途徑） channel; course 3 （方向; 方法; 道理） ...
  • 空對地 : [軍事] air to surface [ground]空對地彈道導彈 air to surface [ground] ballistic missile; 空對地導...
  • 頻道 : frequency channel; channel
  1. The geomorphological instantaneous unit hydrograph ( giuh ) is viewed as the frequency distribution of the times of arrival of individual water deoplets at the catchment outlet. the travel path, for a typical hillslope cell. consists of a hillslope fraction, corresponding to overland flow and a stream fraction, corresponding to concentrated channeled flow. to obtain the time of travel, velocities must be defined. hillslope and stream velocities vary with location and must be strongly correlated with slope, and therefore a spatial distribution of velocities and hence of travel times could be obtained. the present methods of giuh neglect any time delays associated with overland flow pathways

    地貌單位線被看作是流域上各水質點在弱相互作用下，到達流域出口匯流時間的頻率分佈。對於一個典型的山坡型網格單元，匯流路徑由兩部分組成，即坡地部分和河道部分，為了得到匯流時間，必須首先確定匯流速度。坡地和河道的匯流速度隨著區域位置而變，並且必然與坡度有關，因此，可首先計算流速的空間分佈，進而得到匯流時間的空間分佈。
  2. High frequencyvery high frequencyultra high frequency ( hfvhfuhf ) communication equipment this includes the radio transmitters and receivers operating on various frequencies used for both long - range and short - range airground communications with aircraft

    這類儀器包括無線電發射器和接收器，可在不同頻道與航機作長程和短程的地對空通訊。
  3. Space - time coding technology is based on multi - elements antenna array and has strong points of both time processing and space processing. it can satisfy the requirements of high data rate transmission in the future radio mobile system without the increase of the transmitting power and the spread of the frequency. and it can greatly improve the quality of communication services and system capacity under fading channels

    空時編碼技術是一種利用多天線陣發送和接收的技術，該技術能很好地結合時間處理技術和空間處理技術的特點，能在不增大發射功率和不擴展頻帶的前提下滿足未來無線移動通信對高數據率傳輸的要求，從而全面提高衰落通道的通信質量和通信系統容量。
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