ldpc
美 
英
- 网络低密度奇偶校验(Low Density Parity Check)；低密度奇偶校验码；低密度校验码
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.
目的节点可以利用源节点和中继节点的信息进行联合译码，我们称之为网络LDPC编码。
Low Density Parity Check (LDPC) codes are a good liner block codes, which perform at a rate extremely close to the Shannon capacity.
LDPC（低密度奇偶校验码）是一种优秀的线性分组码，可以以距离香农限非常近的速率传输。
The invention can avoid a check bit of indirect continual deleting the LDPC code.
本发明方案可以避免间接连续删除LDPC码的校验比特。
Cyclic shift permutation structure is an important part of partial parallel decoder for quasi-cyclic LDPC codes.
循环移位置换单元是准循环LDPC码的部分并行译码器的重要组成部分。
A construction method and an encoder design scheme for layered approx regular low-density-parity-check (LAR-LDPC) codes were proposed.
提出一种分层近似规则（LAR）LDPC码的构造方法及其编码器的设计方案。
Then, the encoding and decoding methods of LDPC have been discussed, including some popular sub-optimal BP algorithms.
然后，介绍了LDPC码的编译码方法，包括一些热门的次优BP算法。
This paper firstly overviews the efficient encoding of LDPC codes, based on which we proposes a linear encoding for UEP.
首先回顾了LDPC码的有效编码，然后在此基础上提出了一种应用于不等错误保护的线性复杂度编码方法。
For the low density and randomicity of the parity check matrix, LDPC codes can easily combine with high order modulation.
由于LDPC码的低密度性和校验矩阵的随机性，它可以很容易地与各种高效调制方式相结合。
Of encoding algorithm, a conventional algorithm and an efficient algorithm suitable for QC LDPC code are discussed.
在编码算法里讨论了传统的编码算法以及准循环LDPC码的快速编码算法。
And proposes an algorithm to search for the incidence matrices of the simple balanced-cycles of arbitrary length.
分析了准循环LDPC码的平衡环的结构，并给出了搜索任意长度的最简平衡环的关联矩阵的方法。
Designing masking matrixes and choosing cyclic shift indexes are two sticking points in constructing large girth structure LDPC codes.
构造大围线结构化LDPC码的两个关键问题是模板矩阵的设计和循环移位次数的选择。
Thus high-efficient LDPC decoder simplifies the multi-rate QC-LDPC decoder, as demonstrated by simulations and implementation results.
仿真和实现结果证明，该文提出的高效译码器结构适用于各种QC-LDPC译码器的简化设计。
The performance of irregular systematic LDPC-coded non-ideal relay cooperative communication system is studied.
研究了基于非正规LDPC系统码的非理想中继协作通信系统。
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码的结构研究了协作分集网络中的网络编码构造，并把它拓展到多跳网络中。
To construct LDPC codes with no cycles of four sides or less, sufficient conditions on the recursion parameters were derived.
推导了为避免四边以及更少边的循环，迭代参数所需要满足的条件。
Low density parity-check (LDPC) codes were studied, and a new algorithm was proposed to construct LDPC codes based on graph theory.
在对低密度奇偶校验（LDPC）码进行分析的基础上，提出了一种基于图论的构造算法。
Advanced researches on decoding algorithm and decoder structure of QC LDPC code are the focus of this thesis.
本论文主要对准循环LDPC码的译码算法和译码器结构进行了较深入的研究。
Further more, these codes have flexible block length and code rate, and may be used in various areas.
并且采用该构造方法可以构造各种码长和码率的LDPC码，适应不同领域的应用。
The channel decoding performance is improved with channel encoding error-correcting by using Low Density Parity-check Codes(LDPC) codes.
结合低密度奇偶校验码进行信道编码纠错，提高了信道译码性能。
It includes encoding and decoding algorithm of RS code and LDPC code. Finally it implement the RS encoder, RS decoder and LDPC decoder.
具体包括研究了RS编译码算法和LDPC编译码算法，最后实现了RS码编码器，RS码译码器和LDPC码译码器。
Also by properly designing H matrix and data processing unit, the decoder can decode multi code length and multi code rate LDPC code.
另外通过合理地设计LDPC码校验矩阵（H矩阵）和译码器数据处理单元，使得译码器可以支持多种码长码率LDPC码译码。
The decoder employs the Normalized MSA algorithm, and Partially Parallel structure for LDPC code in CMMB standard.
本译码器采用改进的最小和译码算法及符合CMMB标准要求的部分并行译码器结构。
For short and middle length LDPC codes, the oscillation of LLR owing to cycles degrades the performance of BP algorithm.
中短长度LDPC码在采用BP算法译码时，由于短环的存在会导致某些比特LLR值出现振荡现象，从而影响了译码性能。
For the time being, there is little research of applying LDPC codes to the atmospheric wireless optical communication.
目前对无线光通信系统在大气信道中应用LDPC码的研究少见于文献。
The first chapter gives an overview of error correction coding and stressed development and application of LDPC codes.
第一章论述了纠错码的原理和发展，并对LDPC码的发展和应用做了重点介绍；
They show the low complexity of encoding while maintaining a good performance compared to LDPC codes.
它在继承LDPC码优越的误比特率性能的同时，还拥有比LDPC码更低的编码复杂度。
Research on fast encoding of LDPC codes, especially on fast encoding method and encoding circuit of QC-LDPC codes.
对LDPC码的快速编码，特别是准循环LDPC码的快速编码方法和编码电路进行了研究。
The equations for updating messages of different decoding algorithms of LDPC codes are induced.
推导了不同测度下LDPC码各种译码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.
仿真结果表明该算法可以保证LDPC编码系统的性能接近精确同步情况下的性能。
Proposed a puncturing scheme for finite-length low density parity check code (LDPC) codes.
提出了一种有限长低密度校验码（LDPC码）的打孔方案。
But the complexity at the receiver will increase greatly especially for LDPC codes.
但这会使译码复杂度大幅上升，特别是使用LDPC码作为分量码时。
QC-LDPC codes constructed by circulant permutation matrices will lead to inevitable cycles, named balanced-cycles.
在用循环置换矩阵构造准循环LDPC码时会出现一类无法消除的环，称为平衡环。
There are two types of LDPC codes decoding algorithms: hard decision algorithms and soft decision algorithms.
LDPC码的译码算法主要分为两类：硬判决算法和软判决算法。
An optimized decoding algorithm of LDPC codes is proposed to reduce the complexity.
提出了一种简化的LDPC译码算法，以减小译码算法的复杂度。
Irregular LDPC codes and series regular LDPC codes are used as inner codes and outer codes to reduce or even avoid errors floor.
以非规则LDPC码作为内码，串联一个高码率规则LDPC码作为外码，可降低或消除错误平层。
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码的空时级联码的实现方案和译码算法。
In this paper, a stopping criterion for irregular LDPC decoding is proposed.
本文提出了一种用于非规则LDPC码的译码停止方案。
A code-aided iterative carrier estimation is proposed based on statistics of soft information from LDPC iterative decoder.
结合LDPC迭代译码输出软信息的统计特性，提出了一种适合于LDPC码的码辅助迭代载波同步技术。
At last, an application is presented in the transmission of image using LDPC code.
最后，给出了LDPC码在图像传输中的应用。
A construction method of structured low-density parity-check (LDPC) code with large girth based on quasi-cyclic technique is proposed.
提出了一种高围长结构化低密度校验码的构造方法。
