符號速率 的英文怎麼說

中文拼音 [fúháosùlǜ]
符號速率 英文
symbol rate
  • 符 : Ⅰ名詞1 （符節） tally （with two halves made of wood bamboo jade metal issued by a ruler to gener...
  • 號 : 號Ⅰ名1 （名稱） name 2 （別號; 字） assumed name; alternative name3 （商店） business house 4 （...
  • 速 : Ⅰ形容詞（迅速; 快） fast; rapid; quick; speedy Ⅱ名詞1 （速度） speed; velocity 2 （姓氏） a surna...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 符號 : 1 （記號; 標記） character; sign; symbol; mark; code; notation; expression; denotation; sentinel ...
  • 速率 : speed; rate; tempo
  1. The future wireless mobile communication systems are expected to provide ubiquitous, high - quality, and high - rate mobile multimedia transmission. however, hostile multipath fading radio conditions give rise to serious inter - symbol interference ( isi ) ; even worse, wireless channel are often time varying, which makes the system more vulnerable and more difficult to track the channel state. orthogonal frequency dvision multiplexing ( ofdm ), which is inherently resistant against isi, has invoked a popular research interest in recent years, and has been a promising candidate technology of the physical layer for future weideband high - date - rate wireless communications. notwithstanding, ofdm is much more vulnerable to errors of both time and frequency synchronization and to that of channel estimation, and how to obtain correct timing and channel estimation efficiently is highly critical to ofdm systems. the dissertation will focus on both of the aspects of ofdm systems mentioned above

    但是無線環境的多徑特性造成通信系統中嚴重的符號間干擾，同時無線通道的時變性使得通道特性跟蹤復雜。而正交頻分復用技術（ orthogonalfrequencydivisionmultiplexing ， ofdm ）正是一種解決符號間干擾的有效傳輸手段，因此ofdm技術作為未來寬帶高速率無線通信的物理層候選技術在當前引起了一股研究熱潮。但ofdm系統對定時同步誤差和通道估計誤差非常敏感，如何在ofdm系統中準確快速地實現符號同步和通道估計是至關重要的，本論文將重點針對這兩個問題進行討論。
  2. Operation layer is the basic core part in elliptic curve encryption system including how to calculate elliptic curve ' s stairs is a large prime or including a large prime gene to ensure elliptic curve to be safe elliptic curve ; in this article safe elliptic curve is chosen by p1363 sae algorithm. besides, how to achieve fast point multiplication will influence the performance efficiency of the whole encryption system ; in this article, for different situations, signed binary method and rolling window method are respectively applied to perform quick operation of elliptic curve ' s point multiplication

    運算層是橢圓曲線密碼體制實現的最基礎、最核心的部分，包括如何來計算橢圓曲線的階為大素數或含有一個大的素因子，以保證所選取的橢圓曲線為安全橢圓曲線，本文根據ieeep1363協議的sea演算法實現了安全橢圓曲線的選取；另外如何實現標量乘的快速運算，將會影響整個密碼系統的實現效率，本文根據不同情況對橢圓曲線的標量乘法分別採用了帶符號的二進製法和滑動窗口法進行快速運算。
  3. A testbench program is edited to simulate the behavior of the fifo. after the software simulation is accomplished, a real hardware circuit is designed to multiplex two data channels ( 1553b data channel and 1394 data channel ) according to ccsds standard. during the experiment and hardware debugging, the output logic of the fpga is checked up

    設計中，用vhdl語言對高速復接器進行行為級建模，為了驗證這個模型，首先使用軟體進行模擬，通過編寫testbench程序模擬fifo的動作特點，對程序輸入信號進行模擬，在軟體邏輯模擬取得預期結果后，繼續設計硬體電路，設計出的實際電路實現了將來自兩個不同速率的信源數據（ 1394總線數據和1553b總線數據）復接成一路符合ccsds協議的位流業務數據。
  4. Because direct torque control requires very high performance of real - time, the popular microcomputer core dsp is used as controller in the design of hardware. its high speed of running is suitable for the experiment. in the main circuit, there is a highly integrated power element : ipm as inverter, which includes seven igbt, has high switch frequency and fault diagnosis function

    在本控制系統的具體實現上，由於直接轉矩控制對實時性要求很高，因此在硬體方面，採用了目前比較流行的數字信號處理器（ dsp ）作為系統的控制器，其處理速度高的特點正好符合本實驗的需要：在主電路中，本系統使用了集成度高的功率器件：智能功率模塊（ ipm ） ，作為逆變環節，其集成了七個igbt ，實現了高開關頻率逆變以及故障診斷的功能，從而使控制系統的體積大大縮小、控制更加靈活。
  5. Due to the direct torque control requires very high performance of real - time, the popular microcomputer core dsp is used as controller in the design of hardware. its high speed of running is suitable to the experiment. in the main circuit, there is a highly integrated power element : ipm as inverter, which includes seven igbt, has high switch frequency and fault diagnosis function

    在本控制系統的具體實現上，由於直接轉矩控制對實時性要求很高，因此在硬體方面，本課題採用了目前比較流行的數字信號處理器（ dsp ）作為本實驗的控制器，其處理速度高的特點正好符合本實驗的需要；在主電路中，本系統使用了集成度高的功率器件：智能功率模塊（ ipm ） ，作為逆變環節，其集成了七個igbt ，實現了高開關頻率逆變以及故障診斷的功能，從而使控制系統的體積大大縮小、控制更加靈活。
  6. This algorithm can capture and trace the signal with the frequency shift larger than the symbol rate under low e ( subscript b ) / n0 when combining with proper frequency trace algorithm

    該演算法結合相應的頻率跟蹤演算法能夠在低信噪比條件下實現多普勒頻移遠大於符號速率的信號捕獲與跟蹤。
  7. Some modulation parameters, such as the carrier frequency and the symbol rate, can be estimated prior to the recognition of modulation types. such other parameters as the modulation index, the modulation frequency deviation, and the signal broadband can be further estimated after recognition

    部分調制參數如載波頻率、符號速率在識別之前獲得，在識別完成之後可以進一步估計調制指數、調制頻偏、信號帶寬等其餘參數。
  8. Adaptive modulation can also control quality of service according to transmitted information type and greatly increase capacity of system. the data frames in adaptive modulation communication system must be redesigned. because the sender must tell the receiver the current modulation mode by some bits in the data frame and the receiver must gain the current channel condition from the data frame in order to control its modulation mode and symbol rate

    因為發送方須通過數據幀中的某些比特來通知接收方當前的調制方式和符號速率；同樣，接收方也須從數據幀中某個域的比特流來獲得當前的通道條件信息，從而去控制其調制方式及符號速率。
  9. Voice communications and data transmission made along beijing s expressway removed doubts in people s mind about speed of terminal movement and coverage radius of base station of tdd mode. as a result of the experimentation, the datang group and the siemens company plan to organize a large - scale td scdma field demonstration in the near future. according to technical personnel who participated in the field experimentation, with progress of the experimentation, speed of terminal movement allowed by the system can be raised further

    經過在北京高速公路上所做的現場通話和數據傳輸試驗表明： td - scdma終端的移動時速可以達到125km ，基站信號功率覆蓋半徑超過16km ，且通話話音清晰，圖象傳輸穩定，這一試驗結果完全證明td - scdma技術標準完全符合國際電聯（ itu ）對第三代移動通信的要求，消除了人們對于tdd模式在終端移動速度和基站覆蓋半徑的疑慮。
  10. Distortion and gauss white noise distortion. the simulation of ideal system aims at absolutely clean channel, and the nonideal systems respectively set their channels as ricean channel ( multipath distortion channel ) and awgn ( gauss white noise distortion channel ). at the end of simulation, it use examining means of communication system as ber ( bit error rate ) analysis and eye diagrams analysis, then gives a summarize and a comment to the system

    模擬中的系統結構、模塊和傳輸速率的選擇符合標準的dvb1規范en300744 ，理想系統的模擬是針對完全乾凈的通道，而非理想系統分別將通道設置為hcean通道哆徑干擾通道）和awgn （高斯白噪聲通道） ，模擬最後用通信系統的檢測手段進行誤碼率分析和眼圖分析，並對該系統作了總結和評價，加深對了dvb1系統的信號處理過程的理解，明確了目前面臨的問題。
  11. 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。
  12. Stfs is a good coding arithmetic which is simple and easy to realize. moreimportantly stfs has higher diversity order and encoding gain than sts at the samesymbol rate. it can repel channel fading, improve data rate and wireless systemcapacity availability, stand against frequency selectivity fading, eliminate theintersymbol interference

    該編碼演算法不僅在方法和原理上簡單，而且易於實現，在相同符號率下比空時擴頻具有更大的分集度和更高的編碼增益，能有效抵抗通道衰落、提高數據速率、提高無線系統容量、很好的對抗頻率選擇性衰落和消除符間干擾。
  13. On the request of high performance of real - time, the popular microcomputer core dsp is used in the design of hardware, besides, its high speed of running is suitable for the experiment. in the main circuit, the three - phase rectification bridge have been used, which makes it more suitable for the system of high - power timing

    在本系統的具體實現上，本文採用了目前比較流行的數字信號處理器（ dsp ）作為系統的控制器，其處理速度較高，正好符合本實現實時性要求高的特點；在主電路上，本系統採用了傳統的三相橋式全控整流電路，從而使該系統更適用於大功率調速系統。
  14. Subsequently the dissertation discusses the mistakes of the current celebrity advertising, and argues that the unhealthy dependence on the signifier and the kind signified causes the neglect of the personal signified and the syntamatic and paradigmatic structure. all of this leads to an bad effect for the celebrity advertising. the dissertation has three chapters

    本文認為，對于名人符號的能指系統以及「類」所指過分、低層次的依賴，導致了對于個性化所指以及廣告文本橫縱軸結構的忽視與草率，最終才出現了名人符號難以被換檔加速為廣告文本符號、廣告效果大打折扣的尷尬結局。
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