無線幀 的英文怎麼說

中文拼音 [wúxiànzhèng]
無線幀 英文
rf radio frame
  • 無 : 無Ⅰ動詞（沒有） not have; there is not; be without Ⅱ名詞1 （沒有） nothing; nil 2 （姓氏） a surn...
  • 線 : 名詞1 （用絲、棉、金屬等製成的細長的東西） thread; string; wire 2 [數學] （一個點任意移動所構成的...
  • 幀 : 量詞（幅, 用於字畫）
  • 無線 : wireless無線電報 wireless telegram; radiotelegram; 無線話筒 radio microphone ; 無線裝訂 unsewn binding
  1. A qos - support protocol, m - dcf, and its schedule model are proposed. by providing different contention window for different classes, the higher class frames the higher access probability. the simulation proves that m - dcf has better performance than dcf protocol on system throughput, discard ratio, frame discard ratio of higher classes, average access delay of different classes

    提出了為不同等級幀提供不同競爭窗口的改進型dcf ： m - dcf協議，並給出了m - dcf的調度模型，通過採用不同的競爭窗口，為不同n西安電子科技大學博士學位論文:無線局域網和ip服務質量關鍵技術的研究的應用提供了不同的接入概率，保證了qos ;模擬結果證明了m一dcf在系統吞吐率、丟包率、高等級業務丟包率、不同等級業務的平均接入時延等方面都優于dcf協議。
  2. Motion - jpeg adopts intra - frame compression to supply the frame accuracy editing. mpeg - 2 adopts hardware to solve this problem. but at present there is no nles cards which can support mpeg - 4 compression format

    目前尚無支持mpeg - 4壓縮格式的非線性編輯卡， mpeg - 4應用於非編只能採用軟體編解碼，這在幀精確編輯時會引起素材搜索遲緩的問題。
  3. In packet based wireless video communications, when best band distribution, not only source distortion should be considered, but also channel distortion caused by channel errors. the existing macroblock - layer rate control schemes calculates quantization parameters of all macroblocks ( mb ) in a frame in a raster scan order, and then encodes the mbs in the same order. actually, the quantization distortion is heavily dependent upon the coding order of mbs

    在基於包的無線視頻傳輸中，最佳帶寬分配時，不僅要考慮信源編碼失真，也要考慮由於通道差錯引起的通道失真；已有的宏塊層碼率控制演算法以矩陣掃描的順序計算一幀中所有宏塊的量化參數，事實上量化失真與宏塊的編碼順序有很大關系，改變宏塊的編碼順序，使復雜的宏塊分配到更多的比特數，顯然能大大提高編碼效率。
  4. To control the parameters of the protocol easily, we should design the physical system to connect with the pc. therefore, it is very useful to realize the physical systems based on the routing protocol. at the beginning of the paper, the paper introduces the contents of the ad hoc network and wlan

    它的路由協議是基於linux平臺下開發出來的軟體，為了能夠自主地控制協議中的參數，如打包時的幀格式， crc碼的格式，傳輸時延地控制，這就需要無線網卡來連接到計算機終端配合該協議的傳輸和運行，所以如何更好地實現它的硬體平臺，則是有很好的現實意義。
  5. 2 ) appling the theory of information and code. this paper gives the code rule, detail code methods and decode principle of bit code and frame data code. also this paper researches and designs the lower power consumption and anti - jamming code at the signal source point

    2 ）將信息論和編碼理論應用於無線家庭安防系統中，給出了位碼編碼、幀數據編碼的編碼準則、具體編碼方法及解碼原理。研究並設計了信源端具有低功耗和抗干擾性能的最佳編碼方法。
  6. Anti - interference design of information frame in automatic reading meter system through wireless communication

    無線通信自動抄表系統信息幀的抗干擾設計
  7. ( 3 ) for the wireless channels subject to several types of fading existing in different time scales, the dynamics of channel conditions are decoupled into two random processes with different mathematic properties in different time scales. two algorithms in this scheme are proposed to dealing with each time scale : the resource optimizer allocates the resource to maximize the total revenue with price fairness and provide qos guarantees to applications, and the slot scheduler exploits the time variability of

    （ 3 ）針對無線通道衰落的多時間尺度特性，將通道條件snr分解到不同時間尺度上，在不同時間尺度上針對不同的衰落特性來設計不同的演算法，完成不同的任務：在大時間尺度（幀）上進行資源分配，面向應用提供qos保證，保持應用間price公平性的情況下，尋求系統總收益utility的最大化；在小時間尺度（時隙）上進行時隙調度，利用各用戶通道容量的時變性，使各用戶獲得比平均通道條件情況下更高的吞吐量。
  8. This article discusses the modified frame rate control algorithm based on tmn11 and the modified macroblock - layer rate control algorithm

    論文重點討論了無線網路中基於tmn11的改進型幀率控制演算法及改進型宏塊層碼率控制演算法。
  9. In pon, the transmission of downlink signal from olt to onu is not complex. usually, the information destined for onus are combined into a multiframe at olt via tdm before reaching the feeder fiber, and then broadcast to each onu via the passive optical demultiplexor. upon receiving the downlink multiframe signal, each onu takes out the part of information for itself only

    在無源光網路中， olt到onu的下行信號的傳輸過程較為簡單，一般在olt將需要發送到各onu的信息採用時分復用的方式組成復幀送到饋線光纖，通過無源光分路器以廣播的方式發送到每一個onu ， onu收到下行復幀信號後分別取出屬于自己的那一部分信息。
  10. The standard is designed to give a new technical solution for a broad range of applications, such as very low bit rate conversational services and entertainment quality broadcast, interactive video - on - demand services etc. for the enhancement of the coding efficiencies, the new standard adopts new tools as following : multiple reference pictures, variable block - size with seven block sizes in motion prediction, quarter - pixel accuracy for motion vector, short word - length integer transform, context - adaptive entropy coding and loop filter deblocking

    H . 264 / avc標準支持從低帶寬、高誤碼率的無線移動視頻通信到高帶寬、低誤碼率的有線視頻廣播等多種應用，因此，日益受到業界的關注。為了實現更高的編碼效率， h . 264 / avc標準採用了很多新的編碼技術，如多參考幀預測、多尺寸編碼塊模式、 1 / 4像素精度運動矢量、整數變換量化、基於內容的熵編碼、新型幀內預測、去除方塊效應的濾波器等。
  11. In the part of platform designing, proper peripheral chips are chosen according to the audio signal format. and how to achieve channel synchronization in the receiving part is an important aspect of wireless transmission system. in order to solve this problem, three algorithms are used ; those are scramble / descramble, improved over - sampling, and frame synchronization protocol

    在硬體驗證平臺的設計部分，文章根據音頻信號的特點選擇了適當的外圍晶元，並且針對無線傳輸接收端的同步問題，採用了三種演算法來減少失步現象，即擾碼/解擾演算法，改進型的過采樣演算法，以及幀同步協議。
  12. 1 ) realization of software packet embedded in m - es and md - is respectively to accomplish main function of mdlp, including assignment of tei ( temporary equipment identifier ), establishment of multiple frame operation, framing, flow control and error - free transmission of packets, is detailed. 2 ) a test model is established to evaluate the robustness and stability of mdlp and verify the validity of software packets. 3 ) according to the design of radio modem construction used in m - es, the modules of interface between data terminal equipment and radio modem are achieved to enable transmission of short message and continuous pseudo - random bit stream via rs232 uart

    本文首先概述了蜂窩數字分組數據網的結構和空中協議，詳細分析了移動數據鏈路協議，並在此基礎上，重點敘述了以下方面的工作： 1 ）設計並完成了分別應用於m - es和md - is端無線控制器的兩套程序實現數據鏈路層的主要功能，包括分配臨時設備號、建立鏈路、組幀和面向連接的服務保證分組正確無誤地傳輸，並進行適當的流控； 2 ）建立測試模型測試移動數據鏈路協議的可靠性和穩定性，證明了程序包的效用； 3 ）根據cdpd系統無線數據機的軟硬體總體設計方案，完成了介面模塊，實現了rs232異步串口通信，使用戶可以根據需要發送短消息或連續的偽隨機比特流； 4 ）在tms320c54x的軟體、硬體模擬平臺上，建立了cdpd試驗模型，實現了cdpd系統的mdlp基本功能。
  13. Furthermore, this paper exploringly studies an 802. 1 la high - speed wlan with the 54mbps data rate, and presents a sort of time synchronization and frequency offset estimation method based on the frequency domain auto - correlation of the unique preamble training sequence of 802. 11 plcp frame ; the method have the high time precision, the wide frequency estimat ion range and short convergence process ; and moreover, it can applied to other frame communication system

    另外本文還對最高傳輸速率為54mbps的802 . 11a高速無線局域網系統進行了探索性研究，討論了ofdm調制技術在無線局域網中的應用；結合802 . 11a物理層數據幀結構特點，提出了一種基於前導訓練符號序列的頻域自相關時間和頻率同步方法，此方法具有定時精度高、頻偏估計范圍寬和同步建立迅速等特點，也適合於其它幀通信應用場合。
  14. Considering the stability and continuity of face region, and the error propagation effect due to the high error rate in wireless channels, the intra - refresh method is used. the redundant data is not too much owing to the continuity, and the error propagation effect can be stopped accordingly

    由於視頻中出現的人臉具有穩定性，連續性等特點，同時考慮到無線移動通道由於誤碼率高而引起差錯傳播問題，所以採用幀內編碼宏塊刷新的方法。
  15. This paper gives an overview on the development of wireless communication and the orthogonal frequency division multiplexing ( ofdm ) technique. basic characters of wireless channel, transmission principles and signal frame structure design of ofdm are introduced. main non synchronization factors between ofdm transceivers are pointed out

    本文介紹了無線通信與多載波正交頻分復用（ ofdm ）技術的發展概況，闡述了無線通道的基本特性、 ofdm的調制解調原理與信號幀結構的設計，指出了導致ofdm收發信機間不同步的主要因素。
  16. An transmission frame architecture and ofdm character architecture applicable to ofdm discussion on theoretical analysis on the estimate channel modules, five, the article introduces the long distance wireless communication are also presented

    並確定了系統的傳輸參數。同時提出了一個適用於ofdm無線遠距離移動通信的傳輸幀結構和ofdm符號結構。
  17. 3. implementing the serial communication between the cms and lms. putting forward two rules for software flow control and data transmission, as well as implementing the relevant design for command frame, return frame and data frame of them

    （ 3 ）解決了cms與lms之間的串口無線通信問題，提出了一種軟體流量控制規程與數據傳輸規程，並設計了相應的命令幀、回應幀及數據幀的結構。
  18. Some related res ults have been acquired after comparing these cdf with the theoretical capacity. in the fourth chapter, it was at first estimated all the channel coefficients by maximum likelihood estimation and minimum mean square error estimation method on the basis of the construction of the transmission frame and the mathematical model for the wireless mtmo system of channel estimation with training sequence

    第四章首先基於訓練序列估計的無線mimo傳輸幀結構和數學模型，分別使用最小均方誤差估計法和最大似然估計法估計出了通道的各個系數，在小信噪比和大信噪比時，比較了兩種估計方法的估計誤差的方差。
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