級聯通道 的英文怎麼說

中文拼音 [jíliántōngdào]
級聯通道 英文
cascade channel
  • 級 : Ⅰ名詞1 （等級） level; rank; grade 2 （年級） any of the yearly divisions of a school course; gra...
  • 聯 : Ⅰ動詞（聯結; 聯合） unite; join Ⅱ名詞（對聯） antithetical couplet
  • 通 : 通量詞（用於動作）
  • 道 : Ⅰ名詞（道路） road; way; route; path 2 （水流通過的途徑） channel; course 3 （方向; 方法; 道理） ...
  • 通道 : thoroughfare; passageway; pass; enterclose; gallery; drong; tunnel; avenue; alure; way; row; key ...
  1. Therefore, during system design, cascade coding combining reed - solomon codes and convolutional codes is utilized ; in addition, time - direction and frequency - direction interleaves are added to alleviate channel fading

    因此在進行系統設計時，採用了rs碼與卷積碼的級聯編碼方案，並同時加入時間交織和頻率交織來對抗通道衰落。
  2. When the time limit of the preference policies constituted by our country and our province is over, we will support all the items which are put into the support field by the government with fund in the form of finance payment, the abetting scope ; the first 3 years not below 50 % of the company income tax which turn in to county ( engraft, reconstruct, rent, cooperate, annex, share, purchase, recompose the primary company, evaluate according to the new technology enterprises ; the later 4 years, not below 30 % for advanced and new technology enterprises

    執行國家和省出臺的優惠政策期限結束后，凡列入政府扶持范圍的，通過財政支出渠道安排資金，給予支持，其支持額度為：前3年按不低於企業繳納的屬縣級收入的企業所得稅（嫁接、改造、租賃、聯合、兼并、參股、收購、重組現有企業的，按新增企業所得稅計算，下同）的50 % ，其中：高新技術企業不低於60 % ；后4年不低於繳納的屬縣級收入的企業所得稅的25 % ，其中高新技術企業不低於30 % 。
  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. Cascaded low - density erasure codes are based on sparse random bipartite graphs. very efficient linear time encoding and erasure recover algorithms with the arbitrarily near erasure channel capacity performance of the codes with respect to the algorithms have made them one of the most optimal coding techniques up to now

    基於稀疏隨機二部圖的級聯型低密度糾刪碼因其線性時間的編譯碼演算法和可任意逼近刪除通道容量限而成為目前最佳編碼技術之一。
  6. The principles of erasure codes used under binary erasure channels are summarized and erasure codes which belong to standard classes of rs codes are introduced with emphasis on cascaded low - density erasure codes with linear time encoding and erasure recover algorithms. thresholds of regular degree distributions are analyzed. it is shown that low - density erasure codes based on ( d, 2d ) - regular sequences of degree distribution are not close to optimal ( d 3 ). two pares of irregular degree distribution sequences are introduced and a pare of improved right regular sequences of low - density erasure codes are presented, it is testified that the new sequences are asymptotically quasi - optimal. in the meantime, simulations of cascaded low - density erasure codes based on a few types of special sequences of degree distribution available are given, together with performance analyses on these codes

    闡述了應用於刪除通道下的糾刪碼基本原理，介紹了兩類標準的rs碼類糾刪碼，重點分析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，分析了正則度分佈的閾值，對正則低密度校驗碼在刪除通道下的糾錯性能進行了模擬，從理論上證明了基於（ d ， 2d ） -正則度序列的低密度糾刪碼都不是漸近最優碼（ d 3 ） ，同時還分析了非正則低密度校驗碼的度序列設計，基於右邊正則序列提出了一種改進型右邊正則序列，證明了此序列為漸近擬最優的，對基於幾類現有典型度分佈序列的級聯型低密度糾刪碼進行了模擬模擬及性能分析； 3
  7. 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。
  8. Section 4 researches on pilot symbol aided space - time 2d rake receiver in rayleigh fading channel. two kinds of 2d - rake receivers are proposed, one is the interference zeros force 2d - rake receiver ( zf - 2drake ). simulation results reveal zf - 2drake has the better performance than the conventional 2d - rake receiver

    研究了rayleigh通道下2種導頻輔助的空時2d - rake接收機結構:干擾置零2d - rake接收機（ zf - 2drake ）和基於空時通道估計的時空級聯2d - rake接收機（ spce - 2drake ） ，推導了它們的誤碼率性能。
  9. The high efficiency and high power semiconductor laser with multi - active regions, which are cascaded by reverse biased tunnel junction ( s ) can resolve the problems in theory and overcome these shortcomings

    通過反向偏置隧道結將多個有源區再生耦合級聯起來的新型高效大功率半導體激光器從理論和實踐上解決了傳統激光器存在的上述問題。
  10. Chongqing expressway networking toll data communication network cotains 2 - ring and 8 - ray network structure based on expressway physical structure, setting up a trasmission trunk layer of sdh stm - 4 ( can be up - graded to stm - 16 ), and channel protection business entry layer consisting of sdh onu / olt stm - 1 ( can be up - graded to stm - 4 ). data exchange layer, through ip route exchange network above sdh network, forms 3 - level computer network structure of account settlement center - road section management company - toll station. to ensure obtaining original and reliable toll data from communication network, 2m circuitous chain is established between each toll station, accountsettlement center and road section management company, and also pstn dialing backup chain is set up between toll station and account settlement center. in order to maintain clock synchronization of the whole communication network, a proposal of sub - stage clock sychrononization signal network for differet network construction scale has been put forward in this design. in view of sensitivity and importance of toll data, this design particularly gives considerations of network safety and information safety for external and internel of network. therefore, communication safety, smoothness and reliability of networking toll system can be able to maintained in many ways

    重慶高速公路聯網收費數據通信網的結構是根據高速公路的物理結構構築了2環8射的網狀結構，建立了以sdhstm - 4 （可升級到stm - 16 ）的傳輸主幹層，以sdhonu / oltstm - 1 （可升級到stm - 4 ）組成的通道保護業務接入層。數據的交換層是在sdh網之上的ip路由交換網，形成了結算中心-路段管理公司-收費站之間的3級計算機網路結構。為從通信網路上保證收費數據的原始性和可靠性，每個收費站和結算中心、路段管理公司之間建立了2m迂迴鏈路，同時在收費站和結算中心之間建立了pstn的撥號備份鏈路。
  11. Firstly, a new joint filterbank precoders and decision feedback equalizers structure is proposed, and the corresponding optimization result based on the maximal mutual information criterion is derived. secondly, the concept of dt canonical model is proposed, which is very suitable for the task of blind signal processing based on the second - order statistical of the observations. thirdly, the methods of blind equalization and identification of the tv dispersive channels are researched systematically based on the proposed dt canonical model, and a subspace blind identification algorithm of the time - invariant channel matrix is developed

    本文創新性的成果在於：提出了預編碼-判決反饋聯合均衡系統結構，並從理論推導得出了對應的最大互信息量最優化設計結果；首次提出了時變色散通道的離散正則模型概念，該模型適宜於利用觀察數據的二階統計量進行盲信號處理；基於離散正則模型對時變色散通道進行了系統的盲均衡和盲辨識方法研究，提出了對時不變通道矩陣的子空間盲辨識演算法；針對誤差傳播效應問題，提出了可以消除誤差傳播效應的兩級盲辨識演算法；提出了基於離散正則模型的直接盲均衡演算法；提出了基於特徵恢復思想的神經網路直接自適應盲均衡演算法。
  12. And also the paper researches on the two - dimensional pilot - symbol - aided channel estimation, analyzes and realizes the methods that one is realized by the discrete shift - variant 2 - d wiener filter, and the other is realized by the two cascaded orthogonal 1 - d wiener filter

    分析了時頻二維通道估計方法和兩個級聯的一維通道估計方法，並對這兩種方法加以實現，最後給出了相應的實驗結果。
  13. The main works are as follows : firstly, we compare image enhancement in wavelet domain with that based on unsharp masking and indicate that there is intrinsic relation between them, namely they both enhance images by enhancing the high frequency coefficients. because after an image is decomposed in wavelet domain, every high frequency can be enhanced. however, if unshrap masking is used, only one high frequency channel is enhanced

    本文主要研究了基於小波多分辨分析的圖像去噪和增強，主要工作如下： 1將反銳化掩模與基於小波多分辨分析的圖像增強進行了對比分析，指出它們之間存在著內在的聯系，即兩者都是對與圖像邊緣細節對應的高頻實行增強，而且指出前者只不過是後者的一個特例，因為小波分解后，多級尺度多個高頻通道可得到增，而反銳化掩模僅增強了一個高頻通道。
  14. This system is based on two altera ’ s statixii series fpga chips ep2s180f1020c5, and the tunner dtt7579 and the chip ad9433, together composed the main hardware platform. the hardware description system running on the fpga is the core of digital down converted sysgtem, synchronization system, estimation and equalization of channel system, 3780 - point fft ofdm demodulation system, frequency equalization system and ldpc decoding

    以兩片altera公司的stratixii系列ep2s180f1020c5級聯為基礎構建了系統主硬體處理平臺，結合湯姆遜公司的調諧器dtt7579以及ad9433組成了系統的硬體構架fpga可描述硬體系統的核心任務包括數字下變頻，同步和通道均衡與估計， 3780點fftofdm解調，頻域均衡， ldpc解碼。
  15. 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。
  16. 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 ） 。
  17. International networking shall subject itself to the administration by level, that is, interconnected units, access units and subscribers are under the administration by level, and meanwhile international inward and outward channels are subject to the unified administration

    國際聯網實行分級管理，即：對互聯單位、接入單位、用戶實行逐級管理，對國際出入口通道統一管理。
  18. In the practical channel, the methods of interlace and concatenation are often used to reduce the bit error rate

    在實際通道中，常常利用交錯和級聯的方法降低誤碼率。
  19. The simulation result shows that : the performance of the proposed scheme is improved with comparison to pccc and sccc on both awgn channel and the rayleigh fading channel. in awgn channel, it is about same if the snr is low, if the snr is high, the improvement is 0. 2 ~ 0. 5db

    結果表明：本方案的誤碼率性能與并行級聯碼和串性行級聯碼相比，在高斯白噪聲通道上，低信噪比時幾乎相同，高信噪比時有0 . 2 0 . 5db的改善。
  20. The principle of coding and decoding for turbo codes, including pccc, sccc and hccc, are discussed ; based on the introduction of the modified and simplified map algorithms on awgn channel for turbo codes, multiplicative and additive siso decoding algorithms adapted to general iterative decoding are derived

    論述了turbo碼（包括pccc 、 sccc和hccc ）的編譯碼原理，在介紹awgn通道上用於turbo譯碼的修正map譯碼演算法基礎上系統推導了適用於級聯碼迭代譯碼的通用siso譯碼演算法。
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