ldpc
美 
英
- 網絡低密度奇偶校驗(Low Density Parity Check)；低密度奇偶校驗碼；低密度校驗碼
例句
Then the destination node jointly decodes the messages from the source and relay nodes. We call such a procedure as a network LDPC code.
目的節點可以利用源節點和中繼節點的信息進行聯合譯碼，我們稱之為網絡LDPC編碼。
Low Density Parity Check (LDPC) codes are a good liner block codes, which perform at a rate extremely close to the Shannon capacity.
LDPC（低密度奇偶校驗碼）是一種優秀的線性分組碼，可以以距離香農限非常近的速率傳輸。
The invention can avoid a check bit of indirect continual deleting the LDPC code.
本發明方案可以避免間接連續刪除LDPC碼的校驗比特。
Cyclic shift permutation structure is an important part of partial parallel decoder for quasi-cyclic LDPC codes.
循環移位置換單元是準循環LDPC碼的部分并行譯碼器的重要組成部分。
A construction method and an encoder design scheme for layered approx regular low-density-parity-check (LAR-LDPC) codes were proposed.
提出一種分層近似規則（LAR）LDPC碼的構造方法及其編碼器的設計方案。
Then, the encoding and decoding methods of LDPC have been discussed, including some popular sub-optimal BP algorithms.
然后，介紹了LDPC碼的編譯碼方法，包括一些熱門的次優BP算法。
This paper firstly overviews the efficient encoding of LDPC codes, based on which we proposes a linear encoding for UEP.
首先回顧了LDPC碼的有效編碼，然后在此基礎上提出了一種應用于不等錯誤保護的線性復雜度編碼方法。
For the low density and randomicity of the parity check matrix, LDPC codes can easily combine with high order modulation.
由于LDPC碼的低密度性和校驗矩陣的隨機性，它可以很容易地與各種高效調制方式相結合。
Of encoding algorithm, a conventional algorithm and an efficient algorithm suitable for QC LDPC code are discussed.
在編碼算法里討論了傳統的編碼算法以及準循環LDPC碼的快速編碼算法。
And proposes an algorithm to search for the incidence matrices of the simple balanced-cycles of arbitrary length.
分析了準循環LDPC碼的平衡環的結構，并給出了搜索任意長度的最簡平衡環的關聯矩陣的方法。
Designing masking matrixes and choosing cyclic shift indexes are two sticking points in constructing large girth structure LDPC codes.
構造大圍線結構化LDPC碼的兩個關鍵問題是模板矩陣的設計和循環移位次數的選擇。
Thus high-efficient LDPC decoder simplifies the multi-rate QC-LDPC decoder, as demonstrated by simulations and implementation results.
仿真和實現結果證明，該文提出的高效譯碼器結構適用于各種QC-LDPC譯碼器的簡化設計。
The performance of irregular systematic LDPC-coded non-ideal relay cooperative communication system is studied.
研究了基于非正規LDPC系統碼的非理想中繼協作通信系統。
This paper introduces a class of network coding based on LDPC code for a cooperative network and extends it to multi-hop network.
采用LDPC碼的結構研究了協作分集網絡中的網絡編碼構造，并把它拓展到多跳網絡中。
To construct LDPC codes with no cycles of four sides or less, sufficient conditions on the recursion parameters were derived.
推導了為避免四邊以及更少邊的循環，迭代參數所需要滿足的條件。
Low density parity-check (LDPC) codes were studied, and a new algorithm was proposed to construct LDPC codes based on graph theory.
在對低密度奇偶校驗（LDPC）碼進行分析的基礎上，提出了一種基于圖論的構造算法。
Advanced researches on decoding algorithm and decoder structure of QC LDPC code are the focus of this thesis.
本論文主要對準循環LDPC碼的譯碼算法和譯碼器結構進行了較深入的研究。
Further more, these codes have flexible block length and code rate, and may be used in various areas.
并且采用該構造方法可以構造各種碼長和碼率的LDPC碼，適應不同領域的應用。
The channel decoding performance is improved with channel encoding error-correcting by using Low Density Parity-check Codes(LDPC) codes.
結合低密度奇偶校驗碼進行信道編碼糾錯，提高了信道譯碼性能。
It includes encoding and decoding algorithm of RS code and LDPC code. Finally it implement the RS encoder, RS decoder and LDPC decoder.
具體包括研究了RS編譯碼算法和LDPC編譯碼算法，最后實現了RS碼編碼器，RS碼譯碼器和LDPC碼譯碼器。
Also by properly designing H matrix and data processing unit, the decoder can decode multi code length and multi code rate LDPC code.
另外通過合理地設計LDPC碼校驗矩陣（H矩陣）和譯碼器數據處理單元，使得譯碼器可以支持多種碼長碼率LDPC碼譯碼。
The decoder employs the Normalized MSA algorithm, and Partially Parallel structure for LDPC code in CMMB standard.
本譯碼器采用改進的最小和譯碼算法及符合CMMB標準要求的部分并行譯碼器結構。
For short and middle length LDPC codes, the oscillation of LLR owing to cycles degrades the performance of BP algorithm.
中短長度LDPC碼在采用BP算法譯碼時，由于短環的存在會導致某些比特LLR值出現振蕩現象，從而影響了譯碼性能。
For the time being, there is little research of applying LDPC codes to the atmospheric wireless optical communication.
目前對無線光通信系統在大氣信道中應用LDPC碼的研究少見于文獻。
The first chapter gives an overview of error correction coding and stressed development and application of LDPC codes.
第一章論述了糾錯碼的原理和發展，并對LDPC碼的發展和應用做了重點介紹；
They show the low complexity of encoding while maintaining a good performance compared to LDPC codes.
它在繼承LDPC碼優越的誤比特率性能的同時，還擁有比LDPC碼更低的編碼復雜度。
Research on fast encoding of LDPC codes, especially on fast encoding method and encoding circuit of QC-LDPC codes.
對LDPC碼的快速編碼，特別是準循環LDPC碼的快速編碼方法和編碼電路進行了研究。
The equations for updating messages of different decoding algorithms of LDPC codes are induced.
推導了不同測度下LDPC碼各種譯碼算法的消息迭代更新公式。
Simulation results show that little performance degradation has been observed for LDPC coded system.
仿真結果表明該算法可以保證LDPC編碼系統的性能接近精確同步情況下的性能。
Proposed a puncturing scheme for finite-length low density parity check code (LDPC) codes.
提出了一種有限長低密度校驗碼（LDPC碼）的打孔方案。
But the complexity at the receiver will increase greatly especially for LDPC codes.
但這會使譯碼復雜度大幅上升，特別是使用LDPC碼作為分量碼時。
QC-LDPC codes constructed by circulant permutation matrices will lead to inevitable cycles, named balanced-cycles.
在用循環置換矩陣構造準循環LDPC碼時會出現一類無法消除的環，稱為平衡環。
There are two types of LDPC codes decoding algorithms: hard decision algorithms and soft decision algorithms.
LDPC碼的譯碼算法主要分為兩類：硬判決算法和軟判決算法。
An optimized decoding algorithm of LDPC codes is proposed to reduce the complexity.
提出了一種簡化的LDPC譯碼算法，以減小譯碼算法的復雜度。
Irregular LDPC codes and series regular LDPC codes are used as inner codes and outer codes to reduce or even avoid errors floor.
以非規則LDPC碼作為內碼，串聯一個高碼率規則LDPC碼作為外碼，可降低或消除錯誤平層。
This dissertation research the architecture and decoding algorithm of space-time concatenated codes based on LDPC code.
本文主要研究基于LDPC碼的空時級聯碼的實現方案和譯碼算法。
In this paper, a stopping criterion for irregular LDPC decoding is proposed.
本文提出了一種用于非規則LDPC碼的譯碼停止方案。
A code-aided iterative carrier estimation is proposed based on statistics of soft information from LDPC iterative decoder.
結合LDPC迭代譯碼輸出軟信息的統計特性，提出了一種適合于LDPC碼的碼輔助迭代載波同步技術。
At last, an application is presented in the transmission of image using LDPC code.
最后，給出了LDPC碼在圖像傳輸中的應用。
A construction method of structured low-density parity-check (LDPC) code with large girth based on quasi-cyclic technique is proposed.
提出了一種高圍長結構化低密度校驗碼的構造方法。
