channel block 中文意思是什麼

channel block 解釋
槽塊
  • channel : n 1 水路，水道，渠，溝；海峽；河床，河底。2 （柱等的）槽，凹縫；【機械工程】槽鐵，凹形鐵。3 〈比...
  • block : n 1 片，塊，大塊；粗料，毛料；木料；石料；金屬塊；【建築】塊料，砌塊；【地質學；地理學】地塊。2 ...
  1. Block cyclic distributed channel assigment

    分組循環分散定位
  2. 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。
  3. Universal block channel ub

    通用塊通道
  4. Block multiplexer channel

    數組多路通路
  5. Channel coding has two kinds : block code and convolution code

    通道編碼分為分組碼和卷積碼兩大類。
  6. Convolutional coding is a coding scheme often employed in deep space communications and recently in digital wireless communications. it offers an alternative to block codes for transmission over a noisy channel

    卷積碼被運用於衛星通信和無線通信系統中，它提供了一種不同於分組碼的在噪聲通道下傳輸信息的一種編碼方案。
  7. Second, on account of the block of gas channel we designed a gas channel system, through which the hydrogen can flush the gas channel after the reaction by the control of valves

    針對以前氣路堵塞的問題設計並製作了氣路系統，使氫氣在反應后能夠通過閥門控制對氣路進行沖洗。
  8. Space - time codes can be divided into tree mainly parts : bell layered space - time architecture ( blast ), space - time trellis codes ( sttc ) and space - time block codes ( stbc ). in this paper, we mainly compare the performance of blast and stbc in many aspects, such as design criterion, transmission rate, diversity gain, diversity combining, bit error rate and channel capacity etc. in this paper, we first respectively analysed the instantaneous received symbol energy - to - noise ratio of v _ blast in the diversity combining methods of maximal ratio combining ( mrc ), equal gain combing ( egc ) and selective combing ( sc )

    Mimo技術核心是空時編碼（ stc ） 。空時編碼主要分為三種:分層空時碼（ blast ） 、空時格碼（ sttc ）和空時塊碼（ stbc ） 。本文主要對分層空時碼和空時塊碼這兩種編碼方式在設計準則、傳輸速率、分集增益、接收合併、比特差錯率和通道容量等方面進行了較為詳盡的研究。
  9. Abstract : by comparing the channel capacities hetwem orthogonal space - time block coding and multi - antenna array system over rayleigh fading channel, some capacity loss for orthogonal space - time block coding is obtained, which is a function of the code rate, the rank of channel matrix and the number of transmitter and receive antennas, although the system of orthogonal space - time block codes is simple and easy to implemented. if is also shown that there is no capacity loss only if both the code rate and the channel matrix rank are all one

    文摘:在研究瑞利衰落條件下正交空時分組編碼通道容量的基礎上，將其與多發送多接收天線系統的通道容量進行了比較.比較結果表明，正交空時分組碼雖編碼簡單，易於實現，但在通道容量方面存在較大的損失，損失的程度與編碼碼率、通道矩陣的秩及收發天線數等因素有關.進一步研究表明只有當編碼碼率和通道矩陣的秩都為1時，才沒有通道容量的損失
  10. Television broadcasts limited ( tvb ) is pleased to announce that sham tseng transposer sited on the rooftop of block 1, rhine garden, 38 castle peak road will now provide reception services on the pearl channel on saturday 6 march 2004

    為觀眾提供更佳電視接收效果電視廣播有限公司宣布，位於深井海韻花園天臺的深井電視轉播站，自一九九八年起提供中文翡翠臺轉播服務，現將加設英文明珠臺轉播服務。
  11. ( 2 ) in high ca2 + krebs - henseleit ( k - h ) solution ( twice of normal concentration ), duration of phasic contraction induced by fac was prolonged, which was longer than 60min, and the contractile amplitude was enhanced to 58. 71 ?. 71 % ( p < 0. 01 ). after rings were incubated with nifedipine for 15min in order to block the l - type ca2 + channel, the iron induced contractile amplitude was inhibited

    主動脈環用硝苯毗吒（ nifedpine ， nif ）孵育15min以阻斷卜型鈣通道后，再給予鐵刺檄，與未加nif的同濃度細胞外鈣離于組相比，鐵所致的收縮幅度均明顯降低（均p 0刀1 ） ，且高鈣液中鐵引起的相位性收縮幅度明顯高於正常鈣組。
  12. Standards of digital tv broadcast has specified transmitting systems which are based on various medium such as satellite - oriented transmitting system ( dvb - s ), cable - oriented transmitting system ( dvb - c ), terrestrial - oriented transmitting system ( dvb - t ). different system adopts different methods of channel codec, modulation and demodulation, but for signal source block codec, only mpeg - 2 standard has been applied for all the systems. as a compression standard being specified in digital tv broadcast transmission, mpeg - 2 has been widely involved on compression occasion

    對于數字電視信號的傳輸，數字電視廣播標準制定出基於多種媒質傳輸的傳輸系統，如衛星傳輸系統（ dvb - s ） ，電纜電視傳輸系統（ dvb - c ） ，地面廣播（ dvb - t ） ，不同的傳輸系統制定不同的通道編碼和調制解調的方法，但是對于所有傳輸系統的信源編碼則一律採用mpeg - 2這一標準。
  13. Referring to the self - guard mechanism of g. 729, characteristics of rs coding and scdma channel, a scheme using rs ( 7, 5 ) coding with crc and block interleaving is put forward and its effectiveness is verified by both pesq algorithm and subjective test at the end of chapter 4

    結合g . 729自身保護機制、縮短rs編碼和scdma通道的特點，提出了基於rs （ 7 ， 5 ）碼帶crc檢錯及幀內交織的保護方案。並在第四章末採用pesq演算法驗證了該保護方案的有效性。
  14. Considering practical needs and developing trend of vts, based on analyzing the signal characters of vts radar video, studying basic data compression principles in information theory, comparing international coding standards in the forefront of image processing, a vts radar video coding system suitable for transmission in the narrow channel is proposed in this thesis. its main block ? oder and decoder, is realized in the common pc with software. the working process is demonstrated detailed

    結合vts系統的現實要求和發展方向，本文從vts雷達原始視頻圖像數據的特點出發，從信息論中關于數據壓縮的基本原理出發，從現代信號處理特別是圖像信息處理領域中的壓縮編碼國際標準出發，提出了雷達原始視頻編解碼系統方案，其主體部分? ?編解碼器是在pc機內利用壓縮軟體實現，闡述了系統工作流程；提出了基於jpeg壓縮演算法和h
  15. According to wireless and mobile communication system ' s background, this thesis study on estimation of time - varying dispersive channel from four respects : ( 1 ) aid of pilots, ( 2 ) cyclic prefix ( cp ), ( 3 ) blind method, and ( 4 ) ofdm system with multiple transmitting antenna, in which the typical ways is decision - feedback algorithm and self - adaptive block algorithm

    本文以無線和移動通信系統為背景，從四個方面對時變色散通道下的ofdm系統的通道估計和均衡問題進行了研究。第一是基於導頻符號的通道估計方法，第二是基於循環前綴的通道估計方法，第三是通道的盲估計方法，第四是基於多天線ofdm系統的通道估計和均衡方法的研究。
  16. Combined with the adaptive modulation and coding technology, this algorithm reallocates the residual power by effectively utilizing the discrete modulation orders according to the different priorities of sub - channels under the limitation of quality of service over the block fading channel

    在滿足服務質量要求的前提下充分利用星座圖尺寸的離散性，將殘余功率按照各子通道的不同優先級進行二次分配，並結合自適應調制編碼技術改善低信噪比時的系統吞吐量。
  17. 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。
  18. In the channel coding part of the proposed scheme, each 16 - bit are encapsulated into one code block, which is consisted of information bits and parity bits

    信息比特經循環編碼，再經過卷積編碼組成編碼比特（ 56比特） ，最後經過交織形成塊。
  19. According to my jobs and literature search, i inquire and investigate the problems about industrialization of agricultural sci - tech products. after comprehensive analysis and evaluation of the current situation, the main problems of industrialization of agricultural sci - tech products are low rate of industrialization, single investor, short of invest system of venture decision, low embodied value, slow speed, few benefit, channel block and so on. according to analysis of the problems on supplying - demanding and from objective and subjective angle, the main reason is the lowly industrial degree by the effection of inflexible system

    在市場經濟條件下，我國農業科研機構開展農業科技成果轉化工作存在諸多不適應的問題，本文結合本人工作並通過查閱文獻，利用問卷和訪談的方式開展調研，對調研結果進行推斷分析和綜合評價分析，發現目前我國農業科技成果轉化中存在農業科技成果轉化率低，農業科技成果轉化中投資主體單一，缺乏風險決策投資機制，農業科技成果在轉化中價值體現較低，科技成果轉化速度緩慢、轉化效益低，農業科技成果轉化渠道不暢等問題，通過對這些存在的問題，從供需雙方以及從主觀與客觀角度進行分析，查找原因，發現其中主要原因為：受現有科研體制影響，轉化機制不夠靈活，科技成果的產業化程度較低。
  20. Joint channel estimation and symbol detection for space - time block code

    空時分組碼的聯合通道估計和符號檢測演算法
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