分組譯碼 的英文怎麼說
中文拼音 [fēnzǔyìmǎ]
分組譯碼
英文
block decoding-
A sub - optimum decoding algorithm for system concatenated with turbo - tcm and space time block codes
與時空分組碼的級聯系統的次優譯碼演算法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。On the basis of formation and operation principles of the bar code identification system, the author has studied the moment - invariants theory of pattern recognition, and combined the other image processing techniques, then developed a bar code identification system which can recognize not only the lightly contaminated and incomplete bar code but also the distorted bar code with arbitrarily angle. using the idea of the layers, the author has consteructed a kind of two dimension barcode, and developed the identification system for it
在簡介條碼識別系統的組成及工作原理的基礎上，作者針對條碼圖像攝入過程中可能遇到的種種情況，以矩不變為特徵的模式識別理論為依據，結合矩陣分割和其他數字圖像處理技術，開發出不僅能對輕度污染與殘缺的條碼進行識讀，而且能對任意角度有畸變的條碼圖像進行快速識別的一維條碼譯碼系統。The main work of the base - band process part of the receiver is demodulation and decoding, the link control part does the framing and forwarding
接收機的基帶處理部分主要是解調和譯碼，鏈路控制部分組幀和轉發。This system presents us various kinds of user interfaces ( such as thin - client ui ), further more, to facilitate further research and provide a scientific foundation to ensure flight safety and daily monitor, other extended interfaces ( including network interface, data analysis interface, decode interface and etc ), are also provided by the system
該系統由數據採集、譯碼、實時數據處理、實時監控模擬再現等模塊組成，系統還提供用戶介面、網路介面，數據分析介面，譯碼擴展介面等。該系統可以應用於航空公司機務維修等部門，結合地空數據鏈系統，為保障飛機飛行安全以及日常監控提供科學的依據，同時也為飛機油耗優化、技術評估等提供數據支持。In improving the performance of stbc, turbo code is concatenated to stbc. the structure and decoding algorithm of concatenation of turbo - tcm and stbc are studied
為進一步提高空時分組編碼性能，選用turbo碼對空時分組編碼進行擴展，分析了turbo - tcm和空時分組編碼的編碼形式和譯碼演算法。However, stbc overcomes the limitation of sttc that its decoding is very complexly. it makes use of ml decoding arithmetic which possesses orthogonal designs
空時分組碼則克服了空時格形碼譯碼過于復雜的缺陷，它利用具有正交設計的最大似然譯碼演算法實現。Finally, a total design scheme that realizes the stbc is shown and the software which supports the platform is also given
之後，給出了空時分組碼編譯碼器的硬體總體設計方案，闡述了軟體的具體實現過程。Therefore, the research targets of this dissertation are to realize the coding and the decoding of stbc after studying its theory
本文在研究了空時分組碼的理論基礎上，對其編譯碼器進行了硬體模擬實現。Although the structure of stbc decoding is very simple, it can achieve the same diversity gain as the method of mrc, and its use of the spectrum is very high. because of these advantages, sttb is referred into the 3gpp1
由於空時分組碼編譯碼器的結構相當簡單，卻能獲得與最大比合併相同的分集增益，並且它的頻譜利用率高，已經被引用到3gpp1中。Since their rediscovery, design, construction, decoding, analysis and applications of ldpc coded have become focal points of research. among them, the decoding algorithm and its implementation design are the focus of this thesis
Ldpc碼是一種具有稀疏校驗矩陣的線性分組碼，研究結果表明，採用迭代的概率譯碼演算法， ldpc碼可以達到接近香農極限的性能。This class of codes decoded with soft - in soft - out ( siso ) iterative decoding performs amazingly well. since their rediscovery, design, construction, decoding, analysis and applications of ldpc coded have become focal points of research
Ldpc碼是一種具有稀疏校驗矩陣的線性分組碼，研究結果表明，採用迭代的概率譯碼演算法， ldpc碼可以達到接近香農極限的性能。Decoding algorithm of unequal error protection block code based on tree topology
基於樹狀圖的不等保護分組碼譯碼演算法The vd is composed of four functional units : 1 ) the branch metrics unit ( bmu ) ; 2 ) the add - compare - select unit ( acs ) ; 3 ) the path metrics unit ( pmu ) ; 4 ) the survivor memory unit ( smu ) ; regarding the power dissipation of the viterbi decoder, the smu is the hottest spot in the viterbi decoder due to the frequent memory accesses. there are two traditional techniques for the realization of survivor memory unit in viterbi decoder - - register exchange ( re ) and trace back ( tb ) method
這是當前開展低功耗邏輯優化的重要方面，也是本課題採用的方法。 viterbi譯碼器主要由四個功能單元組成:分支度量單元（ bmu ） ，加比選單元（ acs ） ，路徑度量存儲單元（ pmu ） ，倖存路徑存儲和輸出單元（ smu ） 。本文所做的viterbi譯碼器設計採用模塊化的設計方法，先對各個功能單元進行優化設計，然後將各個功能單元組合在一起，形成最終的譯碼器。The paper puts forward a kind of economical numerical control milling machine system which is supported by windows and industry pc that are acted as software and hardware platform on the base of analyzing the present development of economical numerical control system and some existent problem, and expatiates the system software ' s collectivity frame, also introduces detailedly form and operational way of the user ' s interface. besides, the thesis also frames and accomplishes each module such as syntax inspect module, translation module, tool compensation module and track interpolation module adopting visual c + + 6. 0 and the kind of facing object and modularized program design method by analyzing rationales and function of the software ' s modules, moreover presents the programmer ' s flow chart and parts of source code, whereafter validates arithmetic of translation and tool compensation by simulating process testing program
本文在分析了我國經濟型數控系統的發展現狀以及目前存在的一些問題的基礎上，提出了一種以windows和工業pc機作為軟、硬體平臺的經濟型數控銑床系統，闡述了該系統軟體的總體結構，並對其用戶界面的組成及其操作過程做了較為詳細的介紹，分析了軟體的各個模塊的基本原理和功能，採用visualc + + 6 . 0以及面向對象、模塊化的程序設計方法，完成了語法檢查模塊、譯碼模塊、刀具補償模塊以及軌跡插補模塊的具體設計，並給出了程序設計流程圖和部分源代碼，通過系統的模擬程序模擬加工過程驗證了譯碼和刀補演算法的正確性。Since 1980s, many mathematicians have been engaged in studying the applications of the grobner basis such as solving the system of algebraic equations, factoring polynomials, testing primary ideals, factoring algebraic manifolds, decoding circular codes in corrected codes and algebraically geometrical codes, analyzing and synthesizing high dimensional linear recurring arrays in cryptology, dealing with multidimensional systematic theory, signaling, solving integer programming and so on
） bner基的應用研究包括代數方程組求解，多項式的因子分解，素理想的檢驗，代數流形的分解，糾錯碼中循環碼和代數幾何碼的譯碼，密碼學中高維線性遞歸陣列的分析與綜合，多維系統理論，信號處理和求解整數規劃等諸多領域。It emphatically describes address decoding circuit and controling circuit of fpga in hardware, and describes dma transmission mode and disposing of the interrupt in driver, and describes how to get data from wav file, and how to organize data before transmition, and how to chose appropriate quantity of data transmition every time in application
著重闡述了硬體設計中fpga內部重要的譯碼及控制電路設計，驅動程序中dma （ directmemoryaccess ）的傳輸及中斷處理，應用程序中對于兩個聲音文件數據的正確獲取、組合及分割等問題。The charictrization, construction and searching algorithm of m - ldpc codes were studied and analsised. base on m - ldpc codes, a new joint coded modulation scheme is proposed ( bp - mlc - id ), which differ form conventional mlc schems in that only one channel coder was used
在上述基礎上，把多級ldpc碼進一步應用於mimo空間，並與空時分組碼有機結合，提出一種新的基於迭代譯碼的時空并行獨立通道聯合編碼調制（ bp - stbc - id ） 。Space - time block codes ( stbc ) based on orthogonal design has attracts enough attentions in its applications in mimo - ofdm systems for its full diversity exploiting and low coding / decoding complexity. these applications include not only system performance improvement, but also reduction of the peak to average power ratio in mimo - ofdm systems. under these backgrounds, this paper first studies space - time block codes under the single carrier, flat fading situation, discusses the encoding / decoding principle and its performance under different channels. then, the author focused on the performance of space - time codes under time selective and frequency selective channels, uncovered the fundamental cause of how maximum doppler shift and power delay profile influences the performance of space - time codes through deduction and simulation
在上述背景下，本文以單載波，平坦衰落通道下的空時分組碼為切入點，深入分析了其編譯碼原理和在不同通道情況下的性能;以此為基礎，後文展開了對空時分組碼在多載波，時間選擇性和頻率選擇性衰落通道下的性能研究，通過理論推導和充分的模擬，揭示了空時/頻分組碼在時頻選擇性衰落通道中的性能變化的根本原因;在以上對多載波系統中空時分組碼的研究的過程中，作者發現了空時分組碼在降低系統峰平比方面應用的可行性，提出了一種降低峰平比的新方法。In order to further improve the performance, we propose two new kinds of codes, which are ldpc / turbo code, simply denoted by “ l / t ” code, and the product code with generator - based systematic irregular ldpc codes as its component codes in rows and columns. the factors that can impact the performance of the coded systems are investigated and concluded through the simulations
為了進一步提高通道編碼的性能，本文又提出了兩種新的編碼方法，即l / t碼（組合ldpc和turbo編碼）和基於生成矩陣非正規ldpc碼的乘積碼，並在awgn通道下對其性能分別進行了模擬，總結出碼長，迭代次數等不同因素對譯碼性能的影響。分享友人