wireless data link 中文意思是什麼
wireless data link
解釋
無線數據鏈路-
We study and analyze the problems of wireless asymmetric network applications using the original tcp / ip as system transport layer protocols. it is the high error rate in wireless asymmetric link, high - latency, tcp / ip performance deteriorated because of the asymmetric data streams that depressed the efficiency of the utilization coefficient of the wireless link
分析了基本tcp ip作為系統傳輸層協議用於無線非對稱環境下存在的問題，主要是無線傳輸的高誤碼率、較大的延遲，及鏈路非對稱性導致的tcp ip性能惡化，從而降低了無線鏈路的利用率。 -
The dijkstra algorithm of the least of hops is used for path calculated in olsr. but the protocol only tries its best to transmit data, not considering the state of wireless link
它採用dijkstra演算法計算跳數最短路徑，並盡力而為地傳送數據包，沒有考慮無線鏈路時延、帶寬等狀態和節點擁塞程度，這樣的路徑計算方式已經不能滿足用戶對網路提供服務質量的要求。 -
At same time, it has perfect exception handling mechanism and can find hardware, wireless link and tcp connection exception efficiently with the help of hardware watch dog. it can backup data during exception period by backup link and resending mechanism ; can make the whole system run continuously and stably by exception handling. thus, limited hardware resources are saved
同時設備具有完善的異常監測機制，配合硬體看門狗能夠及時並有效地發現硬體異常、無線鏈路異常、 tcp連接故障;通過備份鏈路和重發機制，對發生異常期間的數據進行有效的備份;通過異常處理機制使整個系統能夠持續、穩定地運行，並節省了寶貴的系統硬體資源。 -
At last, this paper details the wireless sensor network experiment system construction and software scheme. through experiment the wireless sensor network experiment system shows high quantity in meshwork link and data collection. the research of this paper accumulates much experience for next work
本課題的研究是對當前自組織無線傳感器網技術發展的探索性嘗試，通過實驗測試表明傳感器網路實驗系統能夠達到預期效果，為進一步開展傳感器網路技術研究積累了大量的實踐經驗。 -
We studied many methods to improve the tcp / ip in wireless environment, such as tcp / ip initial slow start algorithm, initial window and retransmission time out ( rto ) estimate. finally, we consider the round - trip time ( rtt ) with the physical layer and the transfer layer combined together. physical layer using rtt related to the channel state and transfer layer using the constant rtt, the interference between the two layers can be eliminated, and so the effectiveness of the wireless data link can be enhanced
研究了tcp ip的慢速啟動演算法、初始窗口、重傳超時估計以及改善無線tcp ip性能的各種方法，提出了一種把物理層鏈路和傳輸層相結合處理往返時間（ rtt ）的方法：物理層鏈路採用與通道相關的動態rtt ，傳輸層採用常數rtt ，消除了兩層rtt之間的相互干擾，從而提高了無線鏈路的利用率。 -
Motivated by the increasing request of providing the battlefield data dissemination and communications relay, we presents the design of an unmanned aerial vehicle ( uav ) platform ' s applications of tactical communications for providing beyond - line - of - sight ( blos ) communications capability. providing a description of the uav platform ' s development, we conduct a deeply study on the wireless asymmetric data link structure, communication protocols and the algorithm of data dissemination
本文根據戰場通信覆蓋和數據分發的需求，用無人機作為超視距戰術通信的中繼平臺，構成非對稱數據傳輸系統，對系統體制、非對稱傳輸鏈路、通信協議和數據分發調度演算法等進行了深入研究。 -
In wireless network data link layer is built on the physical layer, and it consists of two part : mac layer and llc ( logic link control ) layer
在此基礎上進行了無線收發電路的設計和調試。數據鏈路層建立在無線通道之上，包括mac層和llc層。 -
Combining the theory with the practice, the thesis realize the design of automatic test system uav wireless data link system, the thesis finish the system software and the software of test transmitter of the system
論文將理論結合實際，實現了無人機無線電數據鏈系統自動測試方案的設計，並完成了此系統軟體的頂層設計和發射機測試軟體。 -
For the data link system is very important to the uav system, the thesis analysis and brings forward the capability target of the uav wireless data link system. based on this, the thesis brings forward a automatic test system which connects the test instrument with computer with gpib interface
由於數據鏈系統在整個無人機系統中起著至關重要的作用，本論文在分析、提取無人機無線電數據鏈系統的性能指標的基礎上，提出了一種基於gpib介面的自動測試系統系統。 -
The six layers are : wireless physical layer, wireless data - link layer, network layer, transport layer, mobile computing application supporting environment, and application layer
六個層次是：無線物理層、無線數據鏈路層、無線網路層、無線傳輸層、移動計算應用支撐環境和移動應用層。 -
We designed a wireless asymmetric physical layer link model with a direct sequence spread spectrum system as a transmitted reference. uplink and downlink are both one - way links connected by an ip tunneling. uplink is consisted with the narrowband radio data link of the warfighter information networks ( win )
研究了無線非對稱鏈路，提出了一種用參考法直接序列擴頻（ dsss ）實現的無線非對稱數據傳輸的物理層鏈路模型：利用現有戰斗員信息網電臺的窄帶數據鏈作為上行通道，通過ip隧道技術保證單向鏈路的連通性。 -
At the same time, we have emulations of algorithms of rale updating and time series mining with matlab. in mobile environment, extracting valuable information quickly through data mining provides daily decision - making support and emergency service - support for mobile users, and compact rule information compared to a great deal of original data can reduce the quantity of data translated in a radio link and can save time. foremost, it saves the wireless resources, lightens congestion of bandwidth in wireless network, so that it will enhance the usability and high - efficiency of the whole mobile computing system
在移動計算環境中通過對數據的挖掘和信息的處理，從而快速的移動計算中的規則提取與規則更新研究提取出對移動用戶有價值的信息，不僅提供給移動用戶日常的決策支持和緊急狀況下的應急服務支持，而且簡潔的規則信息相對原始的大量數據而言，可以大大的減少無線鏈路上的傳輸數據量，減少傳輸的時間，最重要的是節省了無線資源，降低了網路阻塞的情況，從而提高了整個移動計算系統的可用性和高效性。 -
It is used all of this to form a utility automatic test system. aiming at needs of the applications, the thesis introduce the uav wireless data link system and it ' s test target firstly, and then introduce the knowledge of the automatic test system
論文中針對實際應用的需要，首先分析了無人機數據鏈性能指標的測試方法，然後介紹了自動測試系統的知識，最後將無人機數據鏈性能指標嵌入自動測試系統的判決準則中，組建出無人機數據鏈自動測試系統。 -
Because of the affection of noise and signal fading, in order to high data rate access and high quality, wireless communication need new technology to improve the link reliability and enhance the spectrum efficiency. mimo ( multiple input and multiple output ) can enhance the spectrum efficiency and increase channel capacity greatly, and reduce the multipath affection without spectrum band and power increasing. the 3th generation mobile communication wcdma is coming, with the purpose of putting mimo, stbc ( space time block coding ), space diversity into practice of wcdma systems, in order to lay the foundation of 3g toward 4g, this dissertation has done some research under this background
在發射機和接收機使用多個天線進行數據傳輸的多輸入多輸出（ mimo ）技術，可以在不增加帶寬和天線發送功率的條件下，成倍的提高頻譜利用率，提高系統的通道容量，還可以抗多徑干擾。第三代移動通信wcdma即將到來，為了將多天線技術（ mimo ） ，空間分集技術，空時編碼技術用到wcdma系統中去，為第三代移動通信向第四代移動通信系統平穩過渡奠定一定的基礎，需要做一些理論上的研究。 -
The goal of this thesis is to give a scheme on the application of wireless sensor network system indoor. first of all, we have a deep research on the ‘ telos ’ node, secondly, we build up a stack system structure of wireless sensor network to monitor the temperature of the building intellectively, design and realize the network stack including physical layer, data link layer, network layer and application layer. finally, we debug the software in order to verify the network layer and the application layer
本文以智能樓宇溫度監測應用為設計目標，以em2420射頻晶元和atme128l單片機為設計載體，在詳細研究telos節點方案基礎上，對面向設計目標的室內無線傳感器網路節點的物理層、數據鏈路層、網路層和應用層之間的網路協議棧進行了實現性設計，建立了立足設計目標的無線傳感器網路協議體系，並在avrstudio4 . 11調試環境下對網路層和應用層設計正確性進行了調試驗證。 -
In next mobile communication system to suffice more and more high - speed data service and demand of qos ( quality of service ) many new wireless link layer transport technologies are going to be used such as mimo ( multiple input multiple output ), ofdm ( orthogonal frequency division multiplexing ), channel coding and acm ( adaptive coding modulation ) etc. low density parity check ( ldpc ) codes were first discovered in 1960 ’ s which belong to linear block codes with their parity matrix being sparse
下一代移動通信系統為了滿足移動用戶對高速、寬帶數據傳輸業務不斷增長和更高服務質量的要求，採用了許多新的無線鏈路傳輸技術，包括多天線發射和接收技術、正交頻分復用技術、通道糾錯編碼技術和自適應編碼調制技術等。上世紀60年代提出的低密度校驗碼，是一種校驗矩陣為稀疏矩陣的線性分組碼。
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