convolutional code 中文意思是什麼

convolutional code 解釋
卷積碼
  • convolutional : 迴旋的
  • code : n 1 法典；法規。2 規則，準則；（社會、階級等的）慣例，習俗，制度。3 （電）碼，代碼，密碼，暗碼；...
  1. The thesis mainly focuses on the encoding and decoding to the systemic convolutional code with programming language, which is prescribed in the intelsat iess 309 standard

    本文主要針對intelsatiess309協議標準中所採用的系統卷積碼，模擬並編程實現其編碼和譯碼。
  2. The mainly work is as follows : 1. aiming at the systemic convolutional code prescribed in the intelsat iess 309 standard we bring forward a kind of actual method and implement the encoder with programming language

    本文所做的主要工作如下: 1 、針對iess309協議中所規定的系統卷積碼，研究了一種實際的編碼方法，並編程實現其編碼。
  3. Turbo codes represent the new code structures, which consist of pccc ( parallel serially convolutional code ) and sccc ( serially concatenated convolutional code ). in this paper, the background of turbo codes are firstly introduced, which includes the base principle of error correction code 、 block code and convolutional code ; the principle of turbo code and the iterative decoding is secondly expanded ; the key decoding algorithm : a revised map algorithm and iterative decoding theory are detailed ; then, a new turbo code structure : hccc ( hybrid concatenated convolutional code ) is presented, and the capacity of this code method is analyzed, the average capacity upper bound is derived ; at last, this code is simulated on awgn ( additive white gaussian noise ) channel and rayleigh fading channel

    本文首先介紹了turbo碼的背景知識，包括差錯控制的基本原理、分組碼和卷積碼；然後闡述了turbo碼的基本原理，包括turbo編譯碼器結構及迭代譯碼原理；較為詳細地描述了關鍵的譯碼演算法： ?種改進的最大后驗概率（ map ）譯碼演算法及迭代譯碼演算法；提出了一種新的turbo碼結構：混合turbo碼（混合級聯卷積碼） ；並用編碼性能聯合界分析方法對混合turbo碼進行了性能分析，得出了其平均性能上界；並在高斯白噪聲通道和瑞利衰落通道上分別作了一些應用研究及計算機模擬實驗。
  4. We discuss the bit error rate of the convolutional code, turbo code encoder and decoder theory as well as the performance in awgn channel and rician channel, and present the result of simulation

    討論了rs與卷積碼級聯的誤碼率問題， turbo碼的編譯碼原理及其在awgn通道和rician通道中的性能，並給出了相應的模擬結果。
  5. 2. aiming at the convolutional code with long encoding restriction we adopt the fano sequential decoding algorithm to implement the decoder

    2 、針對編碼約束度比較大的卷積碼，採用fano序列譯碼演算法來實現譯碼。
  6. The iess 309 standard indicates two decoding methods, we focus on the systemic convolutional code with long encoding restriction which is 36 bit and adopt the fano sequential decoding algorithm to implement the decoder

    在協議中規定了兩種譯碼的方式，我們主要是針對編碼約束度為36的系統卷積碼，採用fano序列譯碼演算法來實現其譯碼，並進行了模擬。
  7. There are many decoding schemes for convolutional code, such as sequence decoding algorithm, fano algorithm, viterbi algorithm. but in fact, what ' s used widely is viterbi decoding algorithm. the viterbi decoding algorithm, proposed in 1967 by viterbi, is a decoding process for convolutional codes in memory - less channel, which takes full advantage of convolutional codes. since viterbi algorithm is proposed, it has obtained rapid development whether in theoretics or in practice and been applied to all kinds of data transmission systems, especially to digital wireless communications and deep space communications

    卷積碼的譯碼演算法方案有很多，如序列譯碼演算法、 fano演算法、 viterbi演算法，但是真正大規模應用的還是viterbi演算法。 viterbi譯碼演算法是1967年viterbi提出的，它是一種對無記憶通道卷積碼進行譯碼的演算法。它充分發揮了卷積碼的特點，因而自viterbi演算法提出以來，無論在理論上還是在實踐上都得到了極其迅速的發展，並廣泛的應用於各種數據傳輸系統，特別是無線通信和衛星通信系統中。
  8. In the proposed scheme, the outer code comprising several block codes for error detection in parallel, and the inner code employing a recursive systematic convolutional ( rsc ) code for error correction, are linked by an interleaver

    本文所討論的體制中，串列級連碼的外碼由多個分組檢錯子碼構成，內碼是一個系統遞歸卷積碼。
  9. Both quantum error correcting code and quantum error avoiding code are practical quantum channel coding schemes. we present in this dissertation a new quantum error correcting code scheme, named serially concatenated quantum convolutional code

    克服量子通道噪聲的編碼就稱為量子通道編碼，實用的量子通道編碼包括量子糾錯碼和量子避錯碼。
  10. We first design the construction modules of serially concatenated quantum convolutional code. and then design the corresponding code - coding gate - array. in quantum error avoiding code, we first unified the definitions of decoherence - free subspace, and then proved that all these definitions are equivalent

    在量子避錯碼方面，統一了各種無消相干子空間的定義，證明了各種定義之間的等價性，同時提出一種利用群論方法構造無消相干子空間的簡單方案。
  11. Many of communication systems take the convolutional code and viterbi algorithm as the channel coding scheme. the viterbi algorithm decoding is a kind of maximum likelihood decoding, and its performance is good over additive white gaussian noise ( awgn ) channel, but when burst errors occur, the decoding performance may be greatly degraded

    維特比譯碼演算法是最大似然譯碼，在由高斯白噪聲引起的隨機錯誤的通道中有良好的性能，但當通道錯誤集中或為突發錯誤通道時，維特比譯碼演算法則性能急劇下降。
  12. But for the same reason, it have n ' t the same diversity feature as space - time block code, as well as it have n ' t the same error correction capability as convolutional code or trellis code modulation

    由於空時格碼兼顧了分集和通道編碼，導致其分集特性不如空時分組碼，糾錯能力不如卷積碼和格形編碼調制。
  13. Turbo codes were presented by c. berrou in international conference on communications in 1993. they hang convolutional code and random interleaver together to realize the idea of random coding, and adopt soft input / soft output ( siso ) iterated decoding to approach maximum likelihood decoding ( mld ). turbo codes come closer to approaching shannon ' s limit

    Turbo碼，由c . berrou等在icc 』 93會議上提出，它巧妙地將卷積碼和隨機交織器結合在一起，實現了隨機編碼的思想，同時，採用軟輸入軟輸出迭代譯碼來逼近最大似然譯碼，具有近shannon限的性能。
  14. The implementation of the convolutional code is also discussed in this paper. finally, the flow chart of the algorithms of the system is described

    最後，在介紹了差錯控制編碼的原理后討論了如何實現卷積碼的編解碼演算法。
  15. Second, this paper design the simulation scheme of bicm for comparing the performance over fading channel and awgn channel that combine 2 / 3 rate, 4 states punctured convolutional code with 8psk modulation, matching block interleave or random interleave, transform through rayleigh channel or awgn channel and use the way that combine coherent demodulation with viterbi decoding in receiver. design the scheme of bicm _ id that use the iterative decoding technique and the scheme of tcm for compare

    為了驗證bicm和bicm _ id在衰落通道和加性高斯白噪聲通道（ awgn ）下的性能，設計了一個2 / 3碼率， 4狀態的鑿孔卷積碼經過塊交織或隨機交織，與8psk調制相結合，在rayleigh通道下或awgn通道下傳輸，接收端採用相干解調與維特比譯碼相結合的bicm方案，在接收端引入迭代反饋譯碼的bicm _ id方案，以及與之相比較的tcm方案。
  16. The paper studies the performance of turbo code and the concatenated code which makes up of rs code and convolutional code

    本文對rs與卷積級聯編碼和turbo碼的性能分別進行了研究。
  17. Furthermore, this paper analyzes the error control system based on concatenated code, mainly including the formation, encoding, decoding of rs code and convolutional code, interleaving, and deinterleaving

    本文同時也就基於級聯碼的差錯控制系統設計作了分析，主要包括rs碼和卷積碼的構成、編碼、譯碼、交織和去交織。
  18. In chapter 3, encoder structure and decoder structure and decoding algorithms of hybrid concatenated convolutional code ( hccc ) is studied

    第三章研究了混合級聯卷積編碼的編譯碼結構、性能限和設計準則。
  19. First, this paper analyses a bicm model and the bicm _ id model based on combination of convolutional code and 8psk modulation, and introduces the principle and key technique

    本文分析了一個基於卷積碼和8psk調制相結合的bicm模型和相應的bicm _ id模型，介紹了它們的原理和其中的關鍵技術。
  20. In the gsm system, error - control is the key - technology of the wireless - interface. combining the error - control technology with the software and hardware, in the baseband transmit part of the gsm mobile station test set, i ' ll provide a module which can accomplish the physical layer ' s protocol of the wireless - interface., and the fec technologies, such as cyclic code, convolutional code and viterbi decode, can be achieved by the baseband module, too

    差錯控制技術是gsm移動通信系統無線介面協議的核心內容，本課題的任務是將差錯控制技術的原理與相關的軟、硬體結合起來，在gsm移動電話綜合測試儀的數字基帶模塊中實現gsm無線介面的物理層協議，完成差錯控制技術中的循環碼、卷積碼、交織、 viterbi譯碼等前向糾錯技術。
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