譯碼復雜性 的英文怎麼說

中文拼音 [yìmǎfùzáxìng]
譯碼復雜性 英文
decoding complexity
  • 譯 : 動詞（翻譯） translate; interpret
  • 碼 : 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...
  • 復 : Ⅰ形容詞1 （重復） repeated; double; duplicate 2 （繁復） complex; compound Ⅱ動詞1 （轉過去或轉過...
  • 雜 : Ⅰ形容詞（多種多樣的; 混雜的） miscellaneous; varied; sundry; mixed Ⅱ動詞（混合在一起; 攙雜） mix; blend; mingle
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  1. In the last half century, researchers have always been searching good code with rate closing to the shannon theory limitation, error ratio being low and it being to be decoded easily

    半個世紀以來，人們一直在尋找碼率接近香農理論極限、誤差概率小和譯碼復雜性低的好碼（又稱漸近好碼或shannon碼） 。
  2. Meanwhile, considering of accuracy, complexity and speed, a 6 + 4 segmented architecture is presented. to enhance the speed performance and reduce error and area of dac, the 6 msbs are thermometer - decoded, and the 4 lsbs are binary - weighted

    同時，考慮到數模轉換器的精度、復雜性和速度特性，決定採用電流舵型結構，確定了6 + 4的分段式譯碼方式。
  3. Under rayleigh fading channel, we also simulated and compared ber in siso 、 simo and mimo systems. secondly, based on careful study the ber and the channel capacity under white noise channel under mpsk modulation when the channel is rayleigh fading, we duduced the expressions of stbc ’ s ber and channel capacity under rice and nakagami fading. and also analysed the performances through numerical simulation using matlab to testify the exactitude of the dudeced expressions. finally, there exists an error floor of stbc through studying on its performance on time - selectiv fading channel. we analysed the reason and proposed two new decode combination scheme to eliminated the error floor and the performance of stbc on time - selective fading channel is improved. and also compared the two scheme ’ s complication and snr gain

    這些結果大部分是閉式結果，能比較準確地衡量空時塊碼的性能，並對不同衰落的性能做了相互比較，其結果對空時塊碼的實際應用具有一定的指導意義。實際的通道是時變的，分析了空時塊碼在時間選擇性衰落通道中產生誤差地板效應的主要原因是存在碼間干擾（ isi ） ，在此基礎上提出了兩種能消除誤差地板效應的譯碼合併方案，並對這兩種方案的復雜度和信噪比增益進行了比較。
  4. The input data of the multiplexing adopts 8 channels with the speed of 2mb / s, and those of the last two channels are " 0 " and " 1 " respectively, in order to improve the transimision effeciency and deminish the complexity of encode and electronic circuit concerned, furthermore, it makes the synchronous signal acquisition more easier

    數字復接中採用八路2m口數據輸入，其中后兩路採用直接輸入「 0 」碼或「 1 」碼的方法，提高了信息傳輸的有效性，便於提取幀同步碼，降低了編譯碼過程的復雜性，同時也降低了系統的電路復雜程度。
  5. The research for key techniques of turbo codes is processed. it includes, ? the design of optimal component codes and the performance of asymmetric turbo codes are analyzed ; ? a search algorithm for short random interleaver based on the distance spectrum and ids criteria is carried out and simplified ; ? random puncturing method to improve the weight distribution of turbo codes with some special code rates is analyzed and simulated. ? the effect of different schemes of trellis termination to the performance of turbo codes is analyzed ; ? a new low complexity decoder structure is provided ; 5

    對turbo碼的部分關鍵問題進行分析和改進，主要包括： ?分析了最優分量碼的設計和非對稱turbo碼的性能； ?設計了基於距離譜和ids的短隨機交織器搜索演算法並進行了簡化； ?提出了採用隨機刪余方式改善特定高碼率turbo碼重量分佈特性的方法； ?分析了不同編碼器狀態歸零方案對turbo碼性能的影響； ?提出了一種降低實現復雜性的turbo迭代譯碼器結構。
  6. Erasure codes which belong to standard classes of rs codes and their erasure correcting principles are introduced with emphasis on cascaded low - density erasure codes with linear time encoding and erasure recover algorithms. the encoding and decoding complexities of these codes are analyzed. 2

    介紹了標準的rs碼類糾刪碼及其糾刪原理，重點介紹了具有線性時間編碼和恢復演算法的漸近好碼?級聯型低密度糾刪碼，分析了這幾類糾刪碼的編譯碼復雜度； 2
  7. And complex rotary codes take charge of encoding and decoding the information bits again. though the rate is a bit lower and the complexity is a bit higher than the original rs codes, the error - correcting capability of rs - complex rotary codes is improved greatly compared with rs codes. because rs - complex rotary codes can be adjusted according to the practical request, it is a class of practical code

    該碼以rs碼為主體結構，同時對信息元進行復轉碼編譯碼，雖然碼率較之原來的rs碼有一定降低，復雜度也略有提高，但是糾錯性能卻由此獲得了較大幅度的提高，同時也使碼字糾錯能力可根據通道要求而進行調節，從而大大增強了實用性。
  8. For practical implementations, simpler decoding algorithms have been suggested. this decoder implements iterative decoding of tpcs using a soft - input hard - output decoder, followed by reliability calculations to obtain oft - decisions from the hard - output of the decoder. the performance of this decoder is nearly optimal and thus the decoding strategy presents a good compromise

    針對實際應用中存在的計算復雜問題，在重復譯碼實現中採用軟進/硬出的簡化演算法，用可靠度估計從硬判決輸出中獲得軟信息，從而使譯碼器在性能優越和計算簡便之間獲得了一個很好的折中，並通過硬體實現了tpc的實時解碼，在低信噪比（ eb / n0 ）的條件下取得了非常低的誤碼率。
  9. The ldpc code ’ s parity check matrix generated by this scheme has high girth and can be used to coding directly, the coding complexity is lower. as to the decoding algorithm, i modify the message passing algorithm based on the girth that i can get in the structure of parity check matrix to improve the decoding performance. what is more, the new structure of the parity check matrix is easy to implement with the hardware

    接著著重圍繞ldpc碼的校驗矩陣構造方法和譯碼演算法展開討論，在比特填充演算法的基礎上提出了一種ldpc碼聯合編譯碼方案，通過該方案構造的校驗矩陣不僅具有良好的girth分佈，而且能直接用於編碼，編碼的計算復雜度低;在譯碼方面，利用構造奇偶矩陣過程中girth分佈信息，優化解碼迭代過程，能有效提高系統性能;並且該方案構造的校驗矩陣更易於實際的編譯碼硬體實現。
  10. Low density parity check ( ldpc ) codes are good error - correcting codes, which can approach shannon ' s capacity limit. due to the sparsity of its check matrix, ldpc codes can be decoded only with linear time complexity using iterative decoding algorithm. therefore, ldpc codes have become one of the most attractive fields in the channel coding community

    低密度校驗碼是一種逼近香農限的好碼，由於其校驗矩陣的稀疏特性，採用迭代譯碼演算法，它的譯碼僅具有線性時間復雜度，所以目前ldpc碼己成為通道編碼理論界的研究熱點之一。
  11. ( 3 ) combined with probability statistic knowledge, introduce the basic theory of message passing algorithm ; analyse the classical decoding algorithm of ldpc codes, including sum product algorithm which based on probability and llr, and min sum algorithm. ( 4 ) research message passing process on the tree ; according spa, turn the flooding schedule to serial schedule based on c - nodes and v - nodes, namely serial algorithm and, analyse de and complexity ; simulations show that the both serial algorithms could improve decoding performance, improve convergence property, reduce complexity

    （ 4 ）研究了和積譯碼演算法在樹上的消息傳遞過程;在ldpc碼經典譯碼演算法基礎上，將洪水消息傳遞機制轉換成基於校驗節點的串列消息傳遞機制和基於變量節點的消息傳遞機制，分別對應串列譯碼演算法和串列譯碼演算法，並對密度進化和譯碼復雜度等方面進行分析;模擬結果表明，兩種串列譯碼演算法都使譯碼性能得到明顯提高，改善了消息收斂特性，降低了譯碼復雜度。
  12. Besides, this treatise has also studied on the coding scheme of two main proposals : wwise & tgn sync and finded that the performance of these ldpc codes is excellent with low complexity. to lower the construction complexity further in tgn sync proposal, we have optimized its coding scheme

    本論文還研究了wwise和tgnsync中的編譯碼方案，並通過模擬證明了採用提案的編碼方式構造的ldpc碼的性能優異，實現的復雜度低，並且在tgnsync提案的構造中，我們作了一些局部優化，降低了構造復雜度。
  13. The forth chapter focus on the researches of decoding algorithm, first studies the decoding theory and decoding approaches of several iterative message passing algorithms for ldpc code, because of the conflict between simplification and reduced performance of bp decoding algorithm, the thesis analyzes the calculation complexity of each algorithm, and simulates the performance of each algorithm, by considering the tradeoff between hardware complexity and error performance, we get two algorithms which are much easier to implement : bp - based and normalized bp - based decoding algorithm, especially, the last one achieves considerable improvement with almost the same complexity

    第四章對ldpc碼譯碼演算法進行了深入研究，給出了基於置信傳播的幾種譯碼演算法的原理和步驟，圍繞著bp演算法的簡化與譯碼性能下降的矛盾，研究了每一種譯碼演算法的復雜度分析，並相應地給出了每一種譯碼演算法的模擬性能曲線，綜合考慮譯碼性能和譯碼復雜度兩個方面，從而得出了適合硬體實現的演算法: bp - based和normalizedbp - based演算法，後者在基本不增加譯碼復雜度的情況下，對譯碼性能有較大的提高。
  14. Simulation shows that the implementation complexity is reduced significantly at negligible performance loss compared to the soft - in - soft - out decoding turbo equalization

    通過模擬表明，這三種演算法與使用軟入軟出譯碼的turbo均衡相比，性能相近，但是計算復雜度小了許多。
  15. 3. by theoretical analysis and simulation, quantization decoding of ldpc codes is studied. an efficient quantization - decoding scheme is proposed which can greatly reduce the decoding complexity with a little performance loss

    採用理論分析和模擬相結合的方法研究了ldpc碼的量化譯碼，提出了一種高效的量化譯碼實現方案，該方案能夠大大降低譯碼復雜度，同時譯碼性能非常接近連續譯碼。
  16. We choose the max _ log _ map decoding algorithm and use the technology of altera and its cyclone2 devices as the fpga design scheme according to all the factors. taking advantage of the technology of fpga, the means, called “ top - down ” and “ down - top ”, is applied in the design of fpga in this paper

    在綜合考慮設計方案的綜合性能、復雜程度、系統規模、系統延時和成本等各項因素后，本次設計選擇了altera公司的cyclone2器件來完成turbo碼譯碼演算法（ max _ log _ map ）在硬體語言上的模擬設計。
  17. Designing codes with approaching shannon ' s capacity performance and low coding and decoding complexity is a challenging and meaningful issue in channel coding field

    設計性能逼近通道容量、編譯碼復雜度較低的實用好碼是通道編碼領域中最重要的工作之一。
  18. Its decoding complexity is also lower than turbo code. recently, ldpc code has drawn the worldwide attentions in channel coding community due to its high performance and strong potential applications in practice

    Ldpc碼的數學定義非常簡單，具有較大的靈活性，當碼長足夠長時的非正規ldpc碼具有比turbo碼更為良好的性能，其譯碼復雜度低於turbo碼。
  19. These information properties include a company s financial data, human resource data, customer information, product sales data etc. because the confidentiality of information properties is getting more and more valuable, software development companies could use the complex designs of software protection lock to enable encode and decode data files, therefore software protection locks have an additional function

    這些信息資產包括公司的財務數據人事數據客戶數據銷售數據等。信息資產的保密性愈來愈受重視，而軟體開發公司可利用軟體保護鎖的復雜設計來達到將數據文件做編碼與譯碼的功能，所以軟體保護鎖便又多了一項可利用的價值。
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