data transmission channel 中文意思是什麼

data transmission channel 解釋
數據傳輸通道
  • data : n 1 資料，材料〈此詞系 datum 的復數。但 datum 罕用，一般即以 data 作為集合詞，在口語中往往用單數...
  • transmission : n 遞送；傳遞；傳達；傳染；移轉；【機械工程】傳動；傳遞；變速器；聯動機件；【無線電】傳送；發射；...
  • channel : n 1 水路，水道，渠，溝；海峽；河床，河底。2 （柱等的）槽，凹縫；【機械工程】槽鐵，凹形鐵。3 〈比...
  1. Shortwave channel is time varying transmission channel. it has dispersion in frequency and time domains. this characteristics hinds the data transmi - ssion at high speed and the correction of received data. in this dissertation i have analyzed the statistic characteristic of shortwa - ve channel, established the model of shortwave channel and simulated the rayl eigh fading distribution. the technology of spreading spetrum has been proved that it has the capability for anti - multipath and discerning multipath

    在短波通信中，由於通道的時間色散和頻率色散，引起多徑展寬和多徑衰落，前者限制了數據的傳輸速率，後者造成短波數據通信中出現突發錯誤，為了解決多徑效應對短波通信的影響，本文所做工作如下：首先詳細分析了短波通道的統計特性，建立其數學模型；其次分析了擴頻通信的特點，從理論上證明擴頻技術不僅具有抗多徑干擾能力，而且具有分離多徑的能力；介紹了傳統的rake分集合併技術的特點。
  2. In this thesis, for the merits of high frequency spectrum utility factor and high - speed data communication, the ofdm is introduced into the underwater acoustic communication. combined with fec to combat the frequency - selective fades and isi in the underwater acoustic channel, high speed data transmission is realized by employing ofdm technology

    本研究嘗試將ofdm技術引入水聲通信領域，利用該技術頻譜利用率高，多載波并行傳送的特點，結合通道編碼，以克服水聲通道多徑干擾引起的頻率選擇性衰落和碼間干擾，獲得高速率數據傳輸。
  3. To ensure the reliable transmission of voice and data, the channel encoding method which the digital trunking communication system uses is crc ( circle redundant code ) & rcpc ( rate - compatible punctured convolution code ) & interleave

    為了保障話音和數據的可靠傳輸，數字集群系統採用的通道編碼方案為crc + rcpc +交織。
  4. Further investigated and analyzed composition structure and flow data that dsa ' s formation of image is systematic at first in this paper, carried on intact summing up to the data in the system, having given out the plan of design of high speed and large capacity data channel of digital formation of image system of x - ray ; deeper discussion of control way on sdram, give solution that many pieces of sdram works togetherses of realizing heavy capacity, designing of heavy capacity deposit board realize storing at a high speed to vision data by frame on the basis of this ; through further investigations of interface of pci bus, optimize back end state machine design and urge procedure making with lower, giving intact pci interface scheme that realize high speed dma data transmission and satisfy request of video transmitting ; further investigate the figure systematic design method of programmable logic devices, due to the difficult point of drifting about of enabled signal in fifo in common use and setting up and keeping of output signal, method has been proposed of improving stability of system making use of signal utilizing the phase locking ring in fpga to offer a lot of clocks to move thus realize coordinating the data between every module of system to transmit at a high speed by making use of fifo

    本文首先對數字減影血管造影（ dsa ）成像系統的組成結構和數據流向進行了深入研究和分析，並對系統中的數據流向進行了完整的歸納和總結，給出了x線數字成像系統中的高速大容量數據通道的設計方案；在對sdram的控制方式做了深入探討后，給出了實現大容量多條sdram共同工作的解決方案，在此基礎上設計了大容量幀存板實現對圖象數據進行高速存儲；通過對pci總線介面的深入研究，優化後端狀態機設計和低層驅動程序開發，給出了完整的pci介面方案實現高速dma數據傳輸，完全可以滿足視頻傳輸要求；深入研究了基於大規模可編程器件的數字系統設計方法，針對通用fifo使能信號漂移、輸出數據難于建立和保持等設計難點，提出了利用fpga中的鎖相環提供多個時鐘相移的信號來提高系統穩定性的解決方案，從而實現利用fifo來協調系統各模塊之間的數據高速傳輸。
  5. There are many decoding schemes for convolutional code, such as sequence decoding algorithm, fano algorithm, viterbi algorithm. but in fact, what ' s used widely is viterbi decoding algorithm. the viterbi decoding algorithm, proposed in 1967 by viterbi, is a decoding process for convolutional codes in memory - less channel, which takes full advantage of convolutional codes. since viterbi algorithm is proposed, it has obtained rapid development whether in theoretics or in practice and been applied to all kinds of data transmission systems, especially to digital wireless communications and deep space communications

    卷積碼的譯碼演算法方案有很多，如序列譯碼演算法、 fano演算法、 viterbi演算法，但是真正大規模應用的還是viterbi演算法。 viterbi譯碼演算法是1967年viterbi提出的，它是一種對無記憶通道卷積碼進行譯碼的演算法。它充分發揮了卷積碼的特點，因而自viterbi演算法提出以來，無論在理論上還是在實踐上都得到了極其迅速的發展，並廣泛的應用於各種數據傳輸系統，特別是無線通信和衛星通信系統中。
  6. Although stb just is a sort of terminal equipments of the tv signal transmission system, however pivotal technique involves the data demodulation, channel decode, transport stream de - multiplexing, audio and video signal decompression technique and real - time software technique with upriver data coding technique etc. therefore, software and hardware technology research and development of stb, which can increase usefulness with dependable of digital video signal and audio signal for study later make the theories preparation and backlog experience

    機頂盒雖然只是數字電視傳輸系統的終端設備，但所用到的關鍵技術涉及到數據解調、通道解碼、傳輸流的解復用、音視頻信號解壓縮技術以及實時軟體技術和上行數據的編碼技術等。因此，通過對機頂盒軟、硬體的研究開發，既能為以後研究如何提高信息傳輸的有效性和可靠性作理論上的準備，也為圖像信號和音頻信號的數字化處理積累經驗。
  7. Aiming at the demand for the wireless data transmission using the public mobile network and the need of the wireless meter reading system, the gprs ( general package radio system ) wireless data transmission terminal used as the wireless channel for data transmission was designed and applied to the wireless meter reading system

    本文針對目前利用公網進行數據通信的需要，以及無線抄表系統的需求，設計了該gprs無線數據傳輸終端，用作無線數據傳輸的通道，並最終實現了該gprs無線數據傳輸終端在無線抄表（電表）系統中的應用。
  8. The design procedure and the application method of the gprs terminal were introduced in this paper in detail. this paper was divided into several main parts as follow : firstly, according to the dominant demands for the wireless channel, the method using the gprs network was selected as the solution for the design of the wireless data transmission terminal by comparing the characteristics of primary wireless data transmission methods

    本文詳細介紹了該gprs終端的設計過程及該終端在無線抄表系統設計方案中的應用，文章主要分為以下幾個部分：第一，針對目前對無線數據傳輸通道的需求，分析了目前主要的幾種無線數據傳輸通道設計方案的特點，論證了設計gprs無線數據傳輸終端的必要性。
  9. After a deep study on the status of the transmission channel in china, we put forward the point that the method to utilize the existing wired television network for a reliable multicast data transmission system has the capability to meet the mentioned challenge, and is a reasonable and applicable means for approaches too

    本文深入研究了我國底層傳輸網路的現狀，認為在有線電視網路上建立可靠組播數據傳送系統是能夠滿足上面的要求的，同時也是比較合理和可行的方法。
  10. Application shows that the telecontrol channel based on pstn provides an applicable method of real - time data transmission for remote mountainous area, area obsessed by fund shortage, and newly - constructed substations and switching stations

    這為邊遠山區，資金緊張的地區和新建變電站、開關站實現實時數據傳輸的要求提出了一種可行的方案，有一定的推廣實用價值。
  11. In data communication, the addition of equipment to a leased voice - grade channel to provide minimum values of line characteristics required for data transmission

    在數據通信中，在租用的音頻通道上增加設備以提供數據傳輸所要求的線路特性的最小值。
  12. Gprs is packet - switched which means that multiple users share the same transmission channel, only transmitting when they have data to send

    整合封包無線電服務是小包-轉變了當他們有數據送的時候，多個使用者分享相同的傳輸頻道，唯一的傳輸哪一個方法。
  13. Chapter 5 introduce the design of the fiber data transmission card bassed on pci bus, and give the debug result of wide band digital t / r module transmission channel

    第四章介紹了寬帶數字t / r組件發射通道試驗電路的fpga程序設計。第五章介紹基於pci總線的光纖數傳卡的設計以及試驗系統的測試與結果。
  14. Secondly, basing on single channel if sr receiver mathematic model, this thesis has designed if sr receiver subsystem and brought forward its design project and system circuit principle diagram, and explained the system working principle. furthermore, this thesis introduces the working principles and respective applications of wideband high - speed adc ad6640, ddc ad6620 and high - speed dsp tms320c6713 according with the if sr receiver subsystem high - speed analog digital conversion department, digital down conversion department and high speed digital signal processing department. thirdly, the thesis emphatically demonstrates the software realization department of the if sr receiver subsystem, which including ad6620 ' s inner parameter software setup, tms320c6713 data transmission and processing and the quadrant demodulation algorithm program realization

    其次，基於單通道中頻軟體無線電接收機數學模型，本文設計了中頻（ if ， intermediatefrequency ）軟體無線電接收機子系統，給出了中頻軟體無線電接收機子系統的設計方案和系統電路原理圖，說明了系統工作原理，並分別對應系統中的高速模數轉換部分、數字下變頻部分、基帶數字碩士學位論文軟體無線電理論研究及中頻軟體無線電接收機子系統設計信號處理部分，介紹了高速adcad664o ，數字下變頻器（ ddc ， digitaldownconverter ） ad6620 ，高速數字信號處理器（ dsp ， digitalsignalproeessor ） tms320c6713的工作原理，以及它們在中頻軟體無線電接收機子系統中的應用。
  15. A pki and smart cards - based security scheme is presental for documents transmission, in this scheme, the client - and server do the authentication each other firstly, encrypte data transmission channel and then transfer secure documents, which significantly improved the ftp security

    該方案在文件傳輸時先進行客戶端和服務器雙向身份認證，然後建立加密數據傳輸通道，在加密通道上安全地傳輸文件，這樣很大程度上提高了ftp的安全性。
  16. The writer synthesize the technology of computer, wireless data communication, automatic control, ect., based in the cosideration of update communication technology according with the traditional industrial, implement a data transmission channel using gsm short message platform, which can meet the requirements of monitoring, dispersing and non - watching of the monitoring collection points, it is also a monitoring collection system with the features of wide covering by net, non - schedueld and unfixed monitoring, and it has the strong points of low investment and low management cost as well. this system has advantages compared with other systems that should meet the requirements as dispered locations of monitoring collection, wide covering, unfixing monitoring, non - strict demand for real - time

    基於將最新通訊技術融合到傳統產業中的考慮，綜合計算機、無線數據通訊、自動化控制等技術，作者成功實現了以gsm短消息平臺作為一種數據傳輸通道，適合監控採集點移動、分散、無人值守，具有網路覆蓋面大、可不定時動態監控特點的無線監控與數據採集系統，該系統具有用戶投資小、運營費用少的優點，對于解決監控採集點分散、覆蓋面廣、監控點移動、實時性要求較低的監控與數據採集任務具有無可比擬的優勢。
  17. Common data interfaces used in radio include rs - 232, etc. as the rapid growth of data speed in data radio, asynchronous serial port does not meet the need of data transmission of high - speed data radio. data radio is gradually using ethernet interface as high - speed data radio ’ s data interface, to function as a high - speed data channel between host computer and data radio. this paper brings forward a universal radio interface protocol model, whose core is taking ethernet as a high speed data channel in network protocol stack

    本文針對電臺的以太網介面，經過對各種電臺的功能分析，提出了一種通用的在以太網通信中適用的報文介面協議模型，其核心思想是將以太網作為網路協議棧中內部的高速數據傳輸通道來使用，作為鏈路層和物理層之間的內部介面，同時提供電臺控制和數據傳輸兩大功能模塊。
  18. Hf manet is a kind of manet that uses short wave channel as the physics medium. mac layer protocols are the core of hf manet to become a network. link layer protocols mainly research on medium access protocol, mac address, automatic link establishment technologies, protocol data structure and data transmission protocol

    鏈路層協議是短波自組織網技術的核心，其主要研究為通道接入協議、鏈路層地址標識、自動鏈路建立、協議幀格式及數據幀傳輸協議等。
  19. Based on the above analysis results, the system design is finished. the system design principal is detailed. the system architecture and data transmission proctocal are discussed. in order to transmit multi - channel data simutaneously on the monacable, tdm ( time division multiplexing ) technique is adoped in the system design. a special code is designed for data transmission on the tool - bus, so that the too - bus can both supply power and transmit data

    包括單芯電纜數據傳輸系統的設計思想、結構設計和數據傳輸協議的制定。在單芯電纜數據傳輸系統設計中，採用時分多路復用技術，實現多種參數儀器數據的同時傳輸。在儀器總線上採用特殊的碼進行數據傳輸，使得儀器總線既能供電又能傳輸數據。
  20. Based on this gateway, a 16kbps fh - gmsk wireless data transmission have accomplished. the arrangement of the thesis is below : chapter 1 gives brief description of software radio in the origin and development status and for the future chapter 2 introduces the theory related to software radio chapter 3 introduces the characteristic about wireless channel and some estimation way of channel chapter 4 introduces scheme of wireless data transmission. a 16kbps fh - gmsk wireless data transmission have accomplished, the mainly modem algorithm is done by dsp chapter 5 summary

    本文的結構安排如下：第一章對軟體無線電的由來、定義、發展狀況以及結構做了簡要的概述第二章介紹了軟體無線電相關的一些理論第三章介紹了無線通道的特性，及常用通道估計的方法第四章介紹了無線數傳的實施方案，在硬體平臺上實現了16kkbps的gmsk跳頻數傳，主要的調制解調演算法在ti的dsp上得到實現第五章總結和展望
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