concatenated codes 中文意思是什麼
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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。 -
A new h - arq scheme that uses progressively decodable serially concatenated codes for retransmission is proposed with its design guidelines. theoretical bounds on total number of transmitted bits and throughput performance are derived. finally, the simulation results are given
提出了基於累進可譯串列級連碼的h - arq體制，論述了其設計原則，推導了重傳比特數和通過率的理論限，給出了性能模擬結果。 -
Evaluate the bit - error bound of serially concatenated codes ( scc ), and present the design guidelines and iterative decoding algorithms of scc
推導了串列級連碼的誤比特率限，介紹了串列級連碼的設計準則以及軟判決譯碼演算法。 -
As the step of the color tv ( the second generation ) to the digital tv ( the third generation ) is larger and larger, the research of digital television terrestrial broadcasting ( dttb ) become more and more important in china, we are concentrating on the standard of dttb which is suit for our country after describing and analyzing the technical stipulation and speciality of dttb, this paper compares atsc 8 - vsb with dvb - t cofdm and isdb - t bst - ofdmo the emphasis of this article lies in the technical solution about transferring system, channel coding is important component of dttb, which can resist from the bad circumstances o because of lots of varieties and different performance, channel coding become one of the emphasis of the research work this paper analyzes and researches the theory and performance of the different channel coding particularly, points out an effective theoretic analysis method and computer demo of performance comparison a theoretical method for estimating the performance of concatenated codes is proposed in this paperc this is achieved by combining the performance of single level coding rayleigh fading channel and the character of channel modulation it may be useful to research and development of the future digital television terrestrial broadcasting standard of our country
通道糾錯編碼是數字電視地面廣播傳輸系統的重要組成部分，是抵禦地面惡劣環境的有效手段。由於通道編碼的種類繁多，性能各異，因此是目前研究工作的重點之一。本文詳細分析和研究了幾種通道糾錯編碼的原理和性能，並針對外碼內碼級聯糾錯結合地面通道瑞利衰落提出了一種有效的理論分析方法和性能的計算機比較演示方案，總結了不同級聯方案的性能特點，對於我國目前的數字電視地面廣播標準的研究和通道級聯糾錯方案的確立及其參數選擇具有一定的參考價值。 -
A scheme of inner concatenated coding based on the characteristics of space - time block codes and diagonally - layered space - time codes is presented
本文基於空時分組碼和對角分層空時碼的各自特點提出了一種內接編碼方案。 -
Performance of concatenated orthogonal pn codes for ds - cdma systems in correlated fading channel
碼直擴系統在相關衰落通道下的性能 -
Conventionally, dtv systems adopt coding schemes such as rs or convolutional codes, or concatenated codes, where the error correction performance is still quite far away from the shannon limit
通常的，數字電視系統採用的通道編碼方案為rs碼或卷積碼，或二者的級聯碼，它的糾錯性能與香農極限相比，仍有一定的距離。 -
Analysis of schemes on turbo - rs concatenated codes
級聯碼編譯碼方法分析 -
Simulation results show that the use of inner concatenated codes results in the largest system capacity according to different demands of the system
模擬結果表明，用該內接碼可以對應于不同的誤碼要求，盡可地提高系統容量。 -
With the developments of the concatenated codes and turbo codes reviewed, the serially concatenated convolutional codes that are the serial counterpart of the turbo codes are introduced firstly in this paper
本文在對級聯碼發展歷史和turbo碼簡要介紹的基礎上，著重研究了串列級聯卷積碼（ sccc ）和串列級聯網格編碼調制（ sctcm ）的編譯碼方法、糾錯性能和設計原則。 -
A serially concatenated iterative scheme ( bpcm - id ) combining low - density parity - check codes ( ldpc ) with multilevel modulation is proposed. differ from other serially concatenated iterative decoding schemes, the whole iterative process of bpcm - id is divided into outer iteration and inner iteration to avoid too much errors feedback to the demapper which may cause severe degradation of decoding performance
論文提出了一種新的多級ldpc碼的概念、基本特性、構造準則和搜索演算法，給出一種融合mlc / bicm的聯合編碼調制系統框架，與傳統mlc系統區別在於用一個多級ldpc碼取代多個分量碼。 -
2. after a brief introduction to belief propagation algorithm and a close research on the message flowing schedule, a new serial concatenated decoding method of ldpc codes based on the matrix decomposition and the two - way schedule is proposed in this thesis
在深入地研究了ldpc碼的基於因子圖模型的和積演算法基礎之上，給出了一種雙向信息傳遞策略的實現方案，提出了一種ldpc碼的串列級聯譯碼演算法。
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