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density evolution theory
相关语句
  密度进化理论
     6. Density evolution theory of LDPC codes is studied, including the continuous density evolution, discrete density evolution and Gaussian approximation.
     6、研究了LDPC码的密度进化理论,包括连续密度进化、离散密度进化及高斯近似。
短句来源
     Density evolution theory is used to analyze the reason for its faster convergence.
     此外,利用密度进化理论,分析了TTWA算法收敛速度快的原因。
短句来源
     Density evolution theory is specified and is applied to the analysis on the threshold of decoding, through which guidance can be provided to optimize irregular LDPC codes.
     阐述了密度进化理论,并分析了译码过程中存在的阈值现象。 然后介绍了密度进化理论在LDPC码优化方面的应用。
短句来源
     This paper summarizes some basic methods of qualitative analysis, such as the density evolution theory, Gaussian approximation and extrinsic information transfer chart, and some important characteristics of these methods are also specified.
     本文首先总结了密度进化理论、高斯逼近原理和EXIT曲线图,并且给出了使用它们来分析低密度校验码的方法和特点。
短句来源
  密度演化理论
     Three problems related to concrete mechanics are investigated. They are, respectively, the deterministic elastoplastic damage constitutive relationship, the stochastic damage constitutive model for concrete materials,and the probability density evolution theory for the nonlinear response analysis of concrete structures. The basic modelling principle and the main formula are presented.
     阐述了混凝土随机损伤力学研究的基本学术观点 ,系统介绍了确定性的混凝土弹塑性损伤本构关系、混凝土随机损伤本构关系、结构非线性反应分析的密度演化理论等内容 ,由此构成了混凝土随机损伤力学研究的基本框架
短句来源
     By analyzing the discretized density evolution theory and the differential evolution algorithm, a method is proposed to search optimal irregular LDPC code for joint optimization of the system.
     在分析和阐述了离散概率密度演化理论和多维线性空间极值问题的基础上,给出了适合于该方案的非正则LDPC码的搜索算法和搜索结果。
短句来源
  “density evolution theory”译为未确定词的双语例句
     After analysis the Discretized Density Evolution theory and the Differential Evolution algorithm, a method is proposed to search optimal M-LDPC code for joint optimizing of the system.
     针对MIMO空间下多级LDPC码的搜索问题,分析比较离散概率密度演化算法和高斯均值近似法的性能差异,并给出二者适用范围。 为避免MIMO空间下的信道估计,论文研究把多级非正则LDPC码和比特交织差分空时编码调制相结合。
短句来源
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Three problems related to concrete mechanics are investigated. They are, respectively, the deterministic elastoplastic damage constitutive relationship, the stochastic damage constitutive model for concrete materials,and the probability density evolution theory for the nonlinear response analysis of concrete structures. The basic modelling principle and the main formula are presented. Some potential research subjects are discussed as well.

阐述了混凝土随机损伤力学研究的基本学术观点 ,系统介绍了确定性的混凝土弹塑性损伤本构关系、混凝土随机损伤本构关系、结构非线性反应分析的密度演化理论等内容 ,由此构成了混凝土随机损伤力学研究的基本框架

A realization of belief propagation algorithms based on the two-way schedule and a serial concatenated decoding algorithm for LDPC codes based on the matrix decomposition are presented. The performance of this new algorithm is systematically analyzed via the density evolution theory. Analysis and simulation results show that the serial concatenated decoding algorithm demonstrates a higher convergence speed and has as good performance as the conventional belief propagation algorithm.

给出了一种置信传播算法双向信息传递策略的实现方案,并基于矩阵分解提出了一种LDPC码的快速收敛译码算法———串行级联译码算法.密度进化理论分析和计算机仿真结果表明,与置信传播算法相比,串行级联译码算法可获得更快的收敛速度和较好的译码性能.

A new scheme (LDPC-DSTM) combining irregular low-density parity-check (LDPC) code with differential space-time modulation (DSTM) is used for coded modulation (CM). Different from conventional multilevel code (MLC) schemes using more than one channel coders, the scheme uses only one irregular LDPC code and achieves the capacity of CM with lower decoding complexity. The system can provide different correct abilities to level bit channel by mapping information nodes that have different degrees. By analyzing the...

A new scheme (LDPC-DSTM) combining irregular low-density parity-check (LDPC) code with differential space-time modulation (DSTM) is used for coded modulation (CM). Different from conventional multilevel code (MLC) schemes using more than one channel coders, the scheme uses only one irregular LDPC code and achieves the capacity of CM with lower decoding complexity. The system can provide different correct abilities to level bit channel by mapping information nodes that have different degrees. By analyzing the discretized density evolution theory and the differential evolution algorithm, a method is proposed to search optimal irregular LDPC code for joint optimization of the system. The performances of LDPC-DSTM are compared with several mapping rules of 16-QAM constellation and two space-time codes. Simulation results in Quasi-stationary fading MIMO channel show that the scheme is very effective.

提出一种新的结合低密度校验码(LDPC)和差分空时调制(DSTM)的联合编码调制方案。该方案利用非正则LDPC码中不同度的信息节点具有不同纠错能力的特性,用一个分量码取代传统多级编码(MLC)方案中多个分量码,并通过特定的映射法则,使得系统可以同样逼近联合编码调制的信道容量,并具有更低的编译码复杂度。在分析和阐述了离散概率密度演化理论和多维线性空间极值问题的基础上,给出了适合于该方案的非正则LDPC码的搜索算法和搜索结果。同时仿真比较了不同星座和不同空时编码的选择对系统性能的影响。在准静态MIMO衰落信道下仿真结果表明,该方案能显著提高系统性能。

 
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