誤碼特性 的英文怎麼說

中文拼音 [xìng]
誤碼特性 英文
bit error performance
  • : Ⅰ名詞(錯誤) mistake; error Ⅱ動詞1 (弄錯) mistake; misunderstand 2 (耽誤) miss 3 (使受損害...
  • : Ⅰ名詞(表示數目的符號或用具) a sign or object indicating number; code Ⅱ量詞1 (指一件事或一類的...
  • : Ⅰ形容詞(特殊; 超出一般) particular; special; exceptional; unusual Ⅱ副詞1 (特別) especially; v...
  • : Ⅰ名詞1 (性格) nature; character; disposition 2 (性能; 性質) property; quality 3 (性別) sex ...
  • 特性 : characteristic(s); character; performance; features; properties; behaviour; response; character...
  1. Aiming at that spread sequence isn ’ t strict balanceable in the basic seds system, we set up three improved models, which can make the sequence balanceable. at the same time their ber performances are different

    本文針對基本自編直擴系統的擴頻序列無嚴格的0 / 1平衡,建立了三種都能達到擴頻序列平衡、但系統能不同的改進模型。
  2. This scheme firstly determined the operating mode of coded video stream in nal layer according to the current channel state before they were packed. the coded video stream operated under ssm in error - free channel so as to reduce the packing tradeoff and increase the coding efficiency. while in error - prone channel, they operated under dpm combined with improved unequal error protection ( uep ) scheme based on human eyes characteristic in order to elevate their robustness to channel error

    該方案中編視頻信息在進行打包封裝前,首先根據當前通道狀態信息自適應地確定其在nal層中的工作模式,在無丟包通道中採用單數據片模式以降低編視頻流的打包開銷,提高編效率;而在丟包通道中採用數據分區模式以提高編視頻流對通道的魯棒能,同時基於人眼視覺,提出了一種改進的uep策略。
  3. In term of the probability of communication system and perturbance theory, the model of the effect of srs to error bit ratio in communication system is established. through the way numerical of simulation, limitations to srs to error bit ration of communication system and input optical power, the number of channel etc are discussed. the obtained conclusion has definitely reference value to the design of practical communication

    根據數字通信系統幾率的和微擾理論,建立了受激喇曼散射對通信系統率影響的理論模型,並通過數值模擬討論了受激喇曼散射對系統率、最大輸入功率和通道數等的限制,獲得了一些對實際光通信系統設計有參考價值的結論。
  4. The signal format of gps is analyzed, the principle models and mathematical models are established, the ber performance is analyzed in a channel interfered with wide - bandwidth awgn, narrow - bandwidth awgn, transmitted signal, single - tone signal respectively. based on the results above interference methods are discussed and simulated. then the performance of code acquisition and code trace of a digital gps receiver are discussed. the modem of linkl 1 and link4a are modeled and their ber performances are analyzed and simulated in channel s interfered with awgn, single - tone signal and multi - tone signal respectively

    建立了jtids的收發終端的數學模型,分析它在噪聲干擾、相關干擾、互相關干擾下的能,提出較佳的干擾方法和干擾型,並進行模擬模擬;分析了gps的信號格式,建立了gps的原理框圖模型、信號數學模型,並對其在寬帶噪聲干擾、窄帶噪聲干擾、轉發干擾、單頻干擾等情形下的能進行了分析比較,提出相對較佳的干擾方法,並做了計算機模擬,針對一數字式gps接收機中擴頻捕獲與跟蹤環的進行分析;建立了link11和link4a數據鏈調制解調數學模型,對它們在噪聲干擾、單音干擾、多音干擾等下的能進行分析,最後對干擾情況進行了模擬模擬。
  5. Because of the unique issues in the networks, including mobility - induced disconnection, network partition, high out - of - order delivery ratios and channel errors, the congestion control and the error recovery in the network is challenging. in this environment, the interaction between tcp and mac layer protocols, the affection of route protocols on the performance of tcp and the particular congestion control and error recovery mechanism are first discussed. then a particular transport layer protocol scheme based on the non - feedback mechanism is presented, with emphasis on the analysis and simulation of the key parameter

    文中主要討論了兩種不同網路結構中的無線tcp協議改進方案,其一在最後一跳為無線鏈路的網路環境中,針對基本tcp擁塞控制機制存在的缺陷,文中在現有解決方案的基礎上提出一綜合的方案,其中包括無線鏈路的高率和連接斷開問題的解決,並重點對方案中出現的交叉層問題進行分析和模擬;其二,考慮的是分散式網路( adhoc ) ,在文中較為詳細的分析了tcp和mac層機制間的相互作用、路由協議中造成tcp能降低的因素、 adhoc網路中應採取的殊擁塞控制和差錯恢復機制,在此基礎上提出了一種採用非反饋機制的解決方案,重點對方案中的關鍵參數進行分析和模擬,分析和模擬結果表明此機制可在很大程度上提高adhoc網路中tcp的能。
  6. As we have introduced a multilevel decision method with discriminator detection to improve the error rate performance, the deducing and analyzing for this method are present in this article. the theoretical error rate and the monte carlo simulation result are showed in figure to compare the system error rate performance affected by different premodulation filter

    在系統模擬中引入了一種有助於改善能的鑒頻加多電平判決的解調方法,文中對此方法也進行了詳細的推導和分析,並給出根據此方法計算出的理論值,結合系統能的蒙卡羅模擬值,對比分析各種預調濾波器對系統能的影響。
  7. According to the principle of spread spectrum communication, the anti - interference performance of the technology is discussed and the composition of power line spread spectrum communication is described. based on the spread spectrum technique, a method which is low cost, high communications quality and low bit error for power line carrier communication using single - chip software programming is proposed

    利用擴頻通信原理,分析擴頻通信的抗干擾,在此基礎上,闡述了電力線載波通信系統的基本結構,提出了一種利用軟體編程實現電力線載波擴頻通信的方法。該方法不增加硬體成本,即能達到提高通信質量、降低率的目的。
  8. Comparing and analyzing the synchronous control strategy, which brings up the new method to control the double un - symmetry jars proceed synchronously with the combination of proportional valve and servo valve, which forms closed loop control ; basing on the above methods, models are made to get mathematics models of position control system and to analyze system model theoretically by using pid controller, we can realize regulating parameters, minimizing synchronous errors and enhancing the dynamic performances ; the simulink tool box in matlab software is used to imitate the system according to the model, which not only makes the result visual and easy to adjust the parameters in interactive way but also lets us understand the effects of different parameters and optimizes the dynamic properties. the theory of plc control in dshp is discussed after advanced understanding of the system movements. hardware design and general regulation are given on the base of siemens company products s7 - 200 plc

    本文根據大量的國內外文獻,對研配液壓機的工作原理及設計結構進行了簡介;對位置同步的控制方法進行了比較分析,提出比例閥和伺服閥復合控制的閉環結構來對非對稱雙缸進行同步控制電液比例同步控制方案;在此基礎上著重對比例閥控非對稱缸建模,最後得到位置控制系統的總體數學模型,從理論上對同步系統動態進行了分析,並用pid控制器進行參數整定,減小雙缸同步差、提高系統的動態響應能;其中控制能的分析藉助于matlab軟體中的simulink工具箱,由已建立的數學模型形成模擬模型,得到可視化的模擬結果,從而利於交互方式下調整參數,了解不同的參數對系統的影響,優化同步系統的動態能;在深入了解系統的動作后,對plc控制研配液壓機的原理進行了探討,針對siemens公司s7 ? 200型plc給出了硬體設計的總體規劃,編制出研配液壓機動作控製程序,在編程中著重研究位移傳感器與plc的通訊、雙缸同步運行的pid控制在plc上的實現及bcd撥盤輸入程序的植入問題。
  9. 2. applying manchester coding theory to meet the end of collision detection and codes judgment effectively. 3. using pulse position modulation ( ppm ) coding theory that is invented especially for optical communication in the air to ameliorate the system ' s performance by improving the system ' s character of pe. 4. taking good advantages of the fledged lan communication protocols and technologies to achieve a new method that has a high rate of capability to cost in building a wireless lan

    論文研究中主要的創新工作如下: 1 、提出利用光散射通信技術組建無線局域網,方便地實現了廉價而高速的局域網內微機的光互連; 2 、採用曼徹斯技術解決了光無線通信中代判決和碰撞檢測的技術難題; 3 、針對空氣通道的點,利用ppm編技術降低通道率、改善系統能; 4 、在光無線局域網中利用現有的成熟有線局域網協議和技術,從而保證了系統的實用及改善了系統的價比。
  10. Meanwhile, we classify the five kinds of waveforms as transmitter pulse. and get the characters of ber in different transmitted waveforms

    同時對發射信號的脈沖波形進行分類,得到不同發射脈沖波形的
  11. By theory and practice simulation, the several types of constant envelope modulation techniques are analyzed and compared, including theirs modulation principle, phase path, the modulated wave envelope, power spectrums, error bit rate and the influence of its power spectrums of the band - limited and non - linear, etc. especially we have researched the ijf - oqpsk modulation technique, and the performance of its inter - symbol interference and time jitter free, and its strongly resisting of spectral spreading

    結合理論和實驗模擬結果,分析討論了衛星通信中的各種恆包絡調制技術,對它們的調制原理,相位路徑,已調波包絡,功率譜密度,能,以及帶限非線通道對其功率譜的影響等方面都作了研究和比較。別研究了ijf ? oqpsk在消除間干擾和定時抖動方面的能及其優良的旁瓣和抑制頻譜擴展
  12. First of all, the characteristics of different adaptive algorithms and equalizers are theoretically researched. then digital microwave communication system model is build by simulink. based on this model, the convergent behavior and bit error rate performance of three equalizers ( nlms, kalman and rls ) are compared in multi - path fading channel

    為了達到這個目的,首先需要從理論上對各種自適應均衡演算法以及自適應均衡器的進行深入研究;然後利用simulink建立接近實際環境的數字微波通信系統,在多徑衰減通道環境下比較了三種基帶均衡器( nlms , kalman和rls )的收斂以及系統誤碼特性,並比較了nlms基帶均衡器和通帶均衡器的能。
  13. Traditional delay estimation based on ica requires the trail sequences to initialize the receiver, but the new algorithm based on ica does not need the trail sequences. it is based on the channel character of downlink, using the ica algorithm to estimate the multi - path mixture matrix, then, find the delay information which is embodied by the column vector of the mixture matrix. the simulation results show that it does enhance the performance of traditional detector without wasting the invaluable frequency resource

    傳統的通道估計演算法需要訓練序列使接收端的參數調整到理想狀態,而本文提出的基於ica的通道估計的多用戶檢測演算法不需要訓練序列,它是利用下行通道的固有點,用ica的盲源分離法估計出多徑通道的卷積矩陣,從而從中提取出通道的延遲信息,模擬實驗結果證明這種方法在節省了頻譜資源的同時取得較好的估計效果,使得傳統的接收機的能得到了很大的提高。
  14. Secondly, we bring statistic coding, prediction coding, transform coding and analysis & synthesis coding into radar area. according to the properties of radar data, we take 4 methods, which are huffman coding ; prediction error model and lzw coding ; fft, uniform quantization in each frequency bank and huffman coding ; wavelet transform, uniform quantization in each frequency bank and lzw coding, to compress the genuine ground clutter radar data and give the corresponding results

    根據雷達回波的,分別採用了huffman編法,預測差模型和lzw編法, fft 、分頻帶均勻量化和huffman編的壓縮演算法,小波變換、子帶均勻量化和lzw編的壓縮演算法等四種演算法,並給出了用這些演算法對真實的地雜波雷達回波數據進行壓縮的實驗結果。
  15. Bit error characteristics and its control in video transmission

    視頻傳輸中傳遞及其控制的研究
  16. In this article, we introduce the basic principle of the self - encoded direct spread ( seds ) system, construct the model of the system, and analyze the main performances of the system, such as ber performance, self - interference, mai performance and so on

    本文介紹了自編擴頻系統的基本原理,構建了系統模型,並對其主要能,如能、自干擾、多址能力和抗多徑干擾能力等作了分析。
  17. Characteristic of ber in system

    系統誤碼特性
  18. As a kind of channel encoding scheme in 3g mobile communication system, turbo codes influences the property of system, so increasing the performance of turbo codes can improve the communication quality of system

    Turbo作為第三代移動通信系統的一種通道編方案,嚴重影響著系統的誤碼特性,而提高turbo的糾錯能可以改善系統的通信質量。
  19. The simulation results based on siso and mimo systems show that the proposed scheme could effectively eliminate the time - variant fading characteristics of wireless channel and under an acceptable demand of ber, the frequency efficiency is enhanced greatly and besides, dynamic encoding is implemented with low complexity and high efficiency

    通過在單天線和多天線系統中的模擬,表明該方案可以有效的克服無線通道的時變衰落,在滿足能要求的基礎上可以提高系統頻譜利用率,且實現復雜度低。
  20. This article proposes the adaptive algorithm based on equal snr signal noise ratio, and applies it in adaptive ofdm system. in frequency selective fading channel, compared with the traditional ofdm system based on equal power allocation, the system outperforms in ber bit error ratio performance

    提出了一種基於最小平均率的自適應預處理演算法,並將該演算法應用於自適應ofdm系統,在頻率選擇衰落通道條件下,與等功率分配的ofdm系統相比,能有了很大程度的提高。
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