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vsat

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vsat VSAT ＝ very small-aperture t...

VSAT ＝ very small-aperture terminal【電信】甚小(天線)孔徑地面站〔一種小型衛星地面站〕。 “vsat very small aperture terminal“ 中文翻譯：   甚小孔徑天線終端，微型衛星地球站; 甚小孔徑終端系統; 甚小口徑終端; 甚小天線地球站; 微型衛星地球站“vsan“ 中文翻譯：   虛擬存儲局域網“vsav“ 中文翻譯：   超小孔徑“vsam virtual storage access method“ 中文翻譯：   虛擬存儲存取法; 虛擬存儲體存取法“vsb“ 中文翻譯：   殘余邊帶; 維斯博服飾有限公司“vsam virtual sequential access method“ 中文翻譯：   虛擬順序存取法“vsb backplane“ 中文翻譯：   vsb底板“vsam“ 中文翻譯：   商業數據仍然在大型主機上以非; 虛擬存儲奇取法; 虛擬存儲器存取方法“vsb vestigia side-band“ 中文翻譯：   殘留邊帶“vsad vacuum spark advance disconnect“ 中文翻譯：   真空點火提前器斷開裝置

vt

Through some research in depth on soct , this thesis proposes a scheme of star - type vsat ( very small aperture terminal ) network based on overlap back transmission , and do some research on key techniques involved with the scheme and their partial realization with fpga ( field programmable gate array ) , such as spread spectrum techniques , a non - coherent de - spreading spectrum and demodulation technique and adaptive interference cancel 本文在深入研究衛星重疊通信技術的基礎上，提出了一種基于重疊回傳的星形vsat網方案。并在衛星重疊通信涉及的幾種關鍵技術及其部分核心器件的fpga實現等方面進行了一些研究，包括：擴頻技術、非相干解擴解調技術、自適應干擾抵消技術等，并將它們用于基于重疊回傳的星形vsat網方案。

Since 1996 , six international global telemedicine conferences have been held by the university , the largest of all being the “ moving with the sun 97 “ conference which was the first 24 - hour telemedicine conference linking up 19 medical centres across the world . telemedicine links medical experts in different parts of the world together by using high speed multimedia network such as asynchronous transfer mode ( atm ) , very small aperture terminal ( vsat ) and virtual private network ( vpn ) as communication media in conjunction with compressed video conference technology 遠程醫療是醫療技術與高科技相結合的典范，以高速多媒體電信網如異步傳輸模式( atm ) 、高速衛星專線( vsat )及組建虛擬專用網( vpn )作為通訊渠道，并配合先進視像壓縮技術與世界聯網，使身處不同地方的醫學專家可以面對面進行各種醫療活動，打破時間和空間的限制，為救死扶傷開創了另一新途徑。

Very small aperture antenna terminal vsat equipment has been installed at the hong kong observatory and chek lap kok for reception of the wafc london broadcast . the vsat equipment occupies very small space . it consists of an antenna and a receiver for reception of the satellite data stream and a data processing workstation for processing and display of the wafs information to forecasters and for incorporation into flight documents 天文臺在總部及赤角分別安裝了甚小天線地面站vsat ，以接收倫敦世界航空區域預報中心的廣播，這套儀器占地甚小，包括天線及接收器，用以接收人造衛星數據，也包括數據處理工作站，用以處理并顯示世界區域預報系統的資料，讓航空預報員參考及用以制作飛行氣象文件。

Sncs international clients include p g china , honeywell china , etc . with its local service , snc helps enterprises and government offices build up telecom and internet information systems including system design , system integration , site wiring , system maintenance , telecom and internet applications 在國際業務中，公司為跨國企業提供國際專線包括光纖固網和vsat衛星方式和其上的語音數據應用服務。在本地業務中，公司為企事業單位提供信息資訊系統設計專業布線系統集成網絡應用和數據電信等一系列解決方案。

We provide technical support to make sure your office equipment work well with your iplc system . if your office is located in an area that existing fiber network does not cover , we provide satellite service ( vsat ) for you to connect conveniently to your destination 光纖技術具有穩定、優質、低價的的優勢，而vsat建站便捷，通信鏈路節點少，帶寬擴增便利，不受現有通信基礎設施的制約，成為了光纖通訊的有力補充，適用于光纖固網尚無法到達的地區。

The main research work and achievements are following : analyzing the running principle , course and requirements to monitor , we make certain the design principle of hardware and software and put forward the scheme of monitoring system and the function modules of software 論文在理論和實踐中的研究成果如下：分析了vsat網絡的工作原理、工作過程及監視過程和要求，確定出監視系統的硬件選擇、軟件功能需求，并提出了系統設計方案和軟件功能模塊劃分。

Especially , we analyze the signals of the vsat system , including the network controlling signal and kinds of operation signals . we make use of serial communication to control demodulation terminials and use kinds of advanced technology such as multi - thread in windows 98 to improve the real - time performance 總體上看,在信號分析過程中,我采用的對于帶偽隨機交織的卷積碼的分析方法是有一定獨創性的,其間涉及了很多數學知識和通信原理。

We provide technical support to make sure your office equipment work well with your iplc system . if your office is located in an area that existing fiber network does not cover , we provide satellite service vsat for you to connect conveniently to your destination 光纖技術具有穩定優質低價的的優勢，而vsat建站便捷，通信鏈路節點少，帶寬擴增便利，不受現有通信基礎設施的制約，成為了光纖通訊的有力補充，適用于光纖固網尚無法到達的地區。

On the basis of the vsat network controlling signal and elements to monitor , we bring forward the research scheme of the monitoring system for vast network and especially study the analysis of network controlling signal , real - time controlling technology and the application of database 本文根據vsat網控信號和需要監視的要素的特點，提出了vsat網絡監視系統的研制方案，重點研究了網控信號解析、設備的實時控制技術和數據庫在系統中的應用。

As an one - stop shopping reseller of major telecom companies in china and international network companies , snc can design best international routes for our clients , chose china side half - circuit provider and oversea half - circuit provider , and negotiate best cost structure and payment terms 隨著信息社會的進步，長途語音數據通信正日益成為廣大用戶的需求熱點，長途通信專線可以通過長途光纖或衛星vsat方式來建立。

Based on the network controlling signal from the satellite station and monitoring policy , the monitoring system controls demodulation terminal and collecting record device to acquire signal and monitor vsat network effectively Vsat網絡監視系統根據衛星地面站前端獲取的網控信號和監視策略，對解調終端設備和采集記錄設備進行控制，從而獲取實際的通信信號，實現對vsat網絡的有效監視。

That means more than 300 paging zones are connected with one another equally through the vsat network . in each paging zone there is a high - speed paging system , which contains a pncc ( paging network control center ) and many launch cells 每個尋呼區內各自建設有一套高速尋呼系統，其核心為一套尋呼網絡控制中心設備( pncc )和多套發射單元(基站控制器和基站) 。

More than 80 specialized communication networks for dozens of departments like finance , meteorology , transportation , oil , water resources , civil aviation , power , public health and the media , etc . have been built , with over 10 , 000 vsat 同時建立了金融、氣象、交通、石油、水利、民航、電力、衛生和新聞等幾十個部門的80多個專用通信網，甚小口徑終端上萬個。

The main research work and achievements are as follows : analyzing the running principle , course and requirements , we make certain the design principle of hardware and software and put forward the scheme of function modules 通過軟件與硬件的良好配合,實現了對目標vsat網的實時監測。在本文中,對各個處理終端采用的軟件流程和硬件配合也做了詳細的說明。

More than 80 specialized communication networks for dozens of departments like finance , meteorology transportation , oil , water resources , civil aviation , power , public health and the media have been built , with over 10 , 000 vsat 同時建立了金融、氣象、交通、石油、水利、民航、電力、衛生和新聞等幾十個部門的80多個專用通信網，甚小口徑終端上萬個。

Sncs international service includes provisioning of international leased lines fiber fixed network and satellite vsat connections , long distance telephony solution , data network applications , and wholesale voice termination 北京星網通信息技術有限公司是為社會信息化提供全面技術服務的專業信息技術服務商。公司業務分為國際業務和本地業務。

Based on these , the monitoring system controls demodulation terminal and collecting record device to acquire signal and monitor vsat network effectively , and realizes real - time monitoring of kinds of operation signals 因此,本文用了大量的筆墨來討論對目標網絡各項信號指標的分析,這也是我們后面進行實時監測的前提。

During the close passage of typhoon york , the antennae of our sadis and iscs - 2 vsat ground stations were blown off their alignment by the wind , and data reception at both stations was interrupted 當臺風約克正面吹襲香港時， sadis及iscs - 2vsat的地面接收站的天線被風吹致偏離校準的位置，導致兩站操作中斷。

During the close passage of typhoon york , the antennae of our sadis and iscs - 2 vsat ground stations were blown off their alignment by the wind , and data reception at both stations was interrupted 當臺風約克正面吹襲香港時， sadis及iscs - 2 vsat的地面接收站的天線被風吹致偏離校準的位置，導致兩站操作中斷。