ldpc 中文意思是什麼

ldpc 解釋
校驗碼
  1. A modified greedy algorithm for ldpc encoder implementation

    編碼中貪婪演算法的改進
  2. The ldpc codes are relatively easy defined and can outperform the turbo codes with sufficiently long block lengths

    Ldpc碼和turbo碼以各自的方式實現接近shannon限的這一目標。
  3. In order to make up this gap, this paper presents a differential detection scheme that serial concatenate a ldpc code to form a iterative detection cycle. moreover, under different channel conditions, simulations show that this scheme can improve the differential system performance considerably, of which may be meritorious to the applications

    所以針對這種情況，本文在第四章提出了一種級聯ldpc碼的turbo差分檢測方案，並通過模擬說明，在級聯不同碼率的ldpc碼下，該方案都可以使差分系統獲得明顯的性能增益，具有一定的應用價值。
  4. In the project of constructing the platform, the design of the time - domian synchronization algorithm is in the charge of me, which has been realized on fpga. it is introduced detailedly in chapter 3 and chapter 4. additionally, the design of ldpc decoder based on fpga is another part of the project

    介於本人在該項目中的主要工作是時域同步演算法設計及fpga實現和ldpc碼譯碼器的fpga設計，在文章的第三章將系統的介紹測試平臺時域同步的演算法設計過程及matlab模擬分析，第四章將介紹時域同步的fpga設計、模擬及硬體調試。
  5. Design of a class of ldpc encoder and decoder

    一類低密度奇偶校驗碼的設計
  6. 3 detailed introduction of familiar construction methods for ldpc codes is presented. it includes the methods of gallager and mackay

    包括最早由gallager提出的構造方法、 mackay對其改進的構造方法、基於有限幾何、圖論及群論上的構造方法等。
  7. Uestc is in charge of the tdd downlink that bases on fpga. low density parity - check ( ldpc ) codes were first discovered by gallager in the early 1960s and recently have been rediscovered and generalized

    低密度奇偶校驗碼（ ldpc ）碼是由gallager在1962年首先提出的一種糾錯碼，在沉寂了多年之後，最近又重新成為通信技術研究的熱點。
  8. Ldpc ( low density parity check ) code is a kind of linear block code that defined by very sparse parity matrix or tanner graph, and it is also called gallager code since gallager initially presented it

    Ldpc （ lowdensityparitycheck ）碼是一類用非常稀疏的校驗矩陣或二分圖定義的線性分組糾錯碼，最初由gallager發現，故亦稱gallager碼。
  9. Low density parity - check ( ldpc ) codes were first discovered by gallager in the early 1960s and recently have been rediscovered and generalized. this class of codes decoded with soft - in soft - out ( siso ) iterative decoding performs amazingly well

    低密度奇偶校驗碼（ ldpc ）碼是由gallager在1962年首先提出的一種糾錯碼，在沉寂了多年之後，最近又重新成為通信技術研究的熱點。
  10. The study of ldpc codes was resurrected in the mid - 1990 ’ s with the work of mackay, luby, and others. ldpc codes are one of the hottest topics in coding theory today. indeed, the performance is almost as close to the shannon limit as that of turbo codes

    Ldpc碼由gallager於1960年首次提出，只是限於當時的技術發展水平難于實現而未能引起足夠重視，直到上世紀九十年代中期， mackay ， luby等人重新發現ldpc碼與turbo碼一樣也是一種能夠逼近香農限的非常好碼，從而使ldpc碼成為新的研究熱點。
  11. The main hardware - platform is based on the altra ’ s statix series fpga chip ep1s80f1020c5. the realization of the energy dispersal, ldpc - coding, symbol interleaving, constellation mapping, synchro - pn insertion, 3780 - point ifft ofdm, interplation fir, etc have been implemented based on fpga

    系統中能量擴散、 ldpc編碼、符號交織、星座映射、同步pn頭插入、 3780點ifftofdm調制以及信號成形4倍插值滾降濾波器等都是基於fpga硬體設計實現的。
  12. Secondly, the encoder circuit of quasi - cyclic which can realize low encoding complexity are designed and implemented. three encoder circuit are designed respectively with feed shift - registers and logic gates : sraa - based serial qc - ldpc encoder ; sraa - based parallel qc - ldpc encoder ; two - stage qc - ldpc encoder

    採用反饋移位寄存器與邏輯門設計了三個典型的編碼器電路:基於sraa電路的串列準循環ldpc碼編碼器;基於sraa電路的并行準循環ldpc碼編碼器;二階編碼電路。
  13. Hybrid bit - flip decoding algorithm for ldpc codes

    低密度校驗碼的混合比特反轉譯碼演算法
  14. Land development policy committee ldpc

    土地發展政策委員會
  15. Ldpc land development policy committee

    土地發展政策委員會
  16. The merged blue print for digital terrestrial television broadcasting which suits to the developing status of dtv in china is a standard of the chinese dtv - t. ldpc code is used as fec

    中國地面數字電視廣播融合方案是根據中國數字電視發展現狀提出的一套地面數字電視標準，其中使用ldpc碼作為前向糾錯編碼。
  17. This master ’ s degree thesis firstly introduces and discusses the principle of ofdm and the merged blue print for digital terrestrial television broadcasting in china, then proposes a scheme for the test platform of narrowband ldpc decoding efficiency based on fpga. this scheme includes techniques such as time - domain synchronization using pn and power estimation using pilots

    本論文首先介紹並討論了數字電視傳輸標準tds - ofdm的實現原理，對其中的一些關鍵問題做了詳細的分析，在此基礎上提出了一種基於fpga的窄帶ldpc解碼-誤碼測試平臺設計方案，即利用時域pn頭同步及頻域導頻進行功率估計的fpga設計。
  18. This test platform is simplified ofdm digital television transmission system. the test platform provides a quick and efficient tool to testing the efficiency of ldpc coding for the setting up of dtv standard, without the need of the completing whold dtv system, saving time, improving work efficiency. even this platform is simplified version, but it still has all the key technique of dtv transmission system, accumulating experiences for the design of dtv transmission system, and it can easily expands

    由於數字電視傳輸系統是一個復雜龐大的工程，為了驗證數字電視傳輸系統中ldpc編碼的效率，以便於標準的確立，窄帶ldpc解碼-誤碼測試平臺就提供了一個快速，有效的編碼測試工具，而不用等整個系統完整的收發端設計完成之後才進行測試，大大的節省了時間，提高了工作的效率，有利於數字電視傳輸標準的盡快確定。
  19. This treatise has researched on the construction of structured ldpc codes, including eg, bibd, semi - random - rotation and an approach based on vector - matrix proposed by us and compared random construction and structured construction through theoretical analysis and simulation. we also compared several structured codes

    本論文研究了結構化ldpc碼的構造，包括基於歐氏幾何空間的eg （ euclideangeometries ）方法、基於組合代數的bibd （ balancedincompleteblockdesign ）方法、半隨機半結構化的-旋轉構造法，以及我們提出的基於矢量矩陣的結構化構造方法。
  20. In b3g - system, the ldpc code has been used with the random irregular parity - check matrix, which the data length is 3944

    「 b3g 」系統中， ldpc碼校驗矩陣為隨機的非規則校驗矩陣，碼長為3944比特。
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