直接衛星通信 的英文怎麼說

中文拼音 [zhíjiēwèixīngtōngxìn]
直接衛星通信 英文
dsc direct satellite communications
  • 直 : Ⅰ形容詞1 （成直線的; 硬挺的） straight; stiff 2 （跟地面垂直的; 從上到下的; 從前到后的） erect; v...
  • 接 : Ⅰ動詞1 （靠近;接觸） come into contact with; come close to 2 （連接; 使連接） connect; join; put ...
  • 衛 : Ⅰ動詞（保衛） defend; guard; protect Ⅱ名詞1 （周朝國名） wei a state in the zhou dynasty2 （姓氏...
  • 星 : 名詞1 （夜晚天空中閃爍發光的天體） star 2 [天文學] （宇宙間能發射光或反射光的天體） heavenly body...
  • 通 : 通量詞（用於動作）
  • 直接 : direct; immediate
  • 通信 : communication; communicate by letter; correspond
  1. The carrier wave is modulated directly by the baseband signal at several frequency point in l band and s band. firstly, this paper clarifies the theory of i / q modulation, elaborates evm and acpl, and analyzes the effect of amplitude and phase unbalance and dc offset on evm. secondly we review the basic principle of phase locked loop and it ’ s composing parts, including the basic conception and design method of pll frequency synthesizer, especially introduce the charge pump pll frequency synthesizer in detail

    首先，在闡述i / q正交調制基本原理的基礎上，通過對誤差矢量和鄰近通道功率泄漏的詳細分析，定性、定量地討論了各種非理想電路因素（如相位不平衡、幅度不平衡、直流偏差等）對調制器性能的影響;其次，介紹了鎖相環的工作原理和基本組成部分，包括鎖相環的設計和環路濾波器的設計，特別詳述了電荷泵鎖相頻率源;第三，介紹了採用直接調制技術模擬衛星信號的射頻前端的設計;最後，對整個直接射頻調制系統進行測試，結果基本上達到了課題要求。
  2. Indispensable for high quality optical carrier signal reception in a large dynamic range, agc analog optical receivers are widely used in the optical transmission of radio and microwave signals, such as fiber catv, direct broadcast satellite tv, wireless communication and radar

    摘要自動增益控制模擬光接收機廣泛應用於光纖有線電視、光纖直播衛星電視、無線通訊及雷達等射頻微波信號光傳輸，是實現大動態范圍光載波信號高質量接收必不可少的一項技術。
  3. Direct broadcast satellite ( dbs ) / dth - service that transmits satellite signals directly to a home, typically through a viewer ' s receiving dish. also called dth for direct - to - home

    直播衛星-通過接收者的圓盤天線，直接從衛星把信號傳送到戶的衛星服務，也稱為直接入戶電視。
  4. First, the system converts the received tv program signals into mpeg file with video capture card, cut the mpeg file into several short mpeg files according to the content of the program and establish index for them. then, it transports the short mpeg files to jukebox server. the jukebox server with responsibility for discs management, it record the program material into discs and provide service for clients visit the program online

    系統將接收到的衛星電視信號通過視頻採集卡，把它採集成mpeg文件，再根據節目內容將mpeg文件分段成小的節目素材文件並建立檢索索引，然後將它傳遞到光盤庫服務器；光盤庫服務器負責光盤的管理，它一方面將節目素材文件刻錄到光盤上，另一方面為客戶機提供在線訪問服務；客戶端根據一定檢索條件進行檢索，獲得所需的節目素材文件，並下載到本地，本地的媒體編輯軟體直接對mpeg文件進行編輯，生成新的節目。
  5. This paper discusses design and implementation of web service which applied in the network control center of beidou satellite, the network control center of beidou satellite base on the beidou satellite locating navigational system, which face to the different business demands of users

    本文所討論的是應用在北斗衛星民用網管中心系統的webservice設計與實現。北斗衛星民用網管中心以北斗衛星定位導航通信系統為基礎，直接面向民用客戶的各種業務需求。
  6. The work process is that the gps subsystem receives gps data from gps satellites, disposes and sends them to the main control console ; the main control console matches gps position data with digital map and displays on the lcd of the system. if the system wants to communicate with the monitoring and dispatching center or user wants to communicate with others, the gsm / gprs subsystem can be used. the main control console consists of arm microprocessor, linux operating system and minigui

    系統的工作過程可描述為: gps子系統接收來自gps衛星的定位信息，處理后將定位信息傳送給主控平臺;主控平臺將實時定位信息與電子地圖匹配並通過直觀的方式顯示在系統的lcd上;如果車載導航系統需要與監控中心進行數據通信或者用戶需要和監控中心或第三方進行通信，則可通過主控平臺來控制gsm / gprs子系統來實現，通信方式包括簡訊息通信、語音通信、 gprs通信。
  7. Satellite signal receiver is the outcome of the development of the modern communication techniques, it has been widely used in many fields, such as satellite navigation 、 satellite television living broadcast and satellite digital broadcasting, etc. rf circuit is a very important part of the satellite signal receiver

    衛星接收機是現代通信技術發展的產物，已在衛星導航定位、衛星電視直播以及衛星數字廣播等領域中得到廣泛的應用。射頻電路是衛星接收機中一個非常重要的組成部分，它對接收到的微弱衛星信號進行放大與下變頻處理后輸出給後端的信號處理電路。
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