码重

从码重分布的角度分析了影响Turbo码性能的原因，介绍了Turbo码最优周期交织器的概念，为Turbo码提供了一种新的交织器设计方法。

From the point of view of the distribution of code weight , the factors affecting the quality of Turbo codes are analyzed , the concepts of optimal periods interleaving implement for Turbo codes are introduced , and a new design of interleaving implement for Turbo codes is provided .

与码重匹配交织器的设计

Design of Code Weight Matching Interleaver

基于低码重分布的概念，对Turbo码的不等保护作了进一步的探讨，给出了修改后的三种不等保护的方法。

The unequal protections of Turbo codes are studied further more under the distributions of low weight codewords .

基于低码重分布的优化能量分配在3GPP交织器的实现

Optimal energy allocation based on the distribution of low weight codewords for 3 GPP interleaver

一种支持OVSF码重分配的下行带宽分配算法

An Allocation Algorithm for Downlink Bandwidth Supporting Reassignment of OVSF Codes

提出了交织器的码重分析、相关性分析和交织器迭代译码的适应性（IDS）三种性能判别和分析方法。

Three criteria for evaluating performance of interleaver , ie. , the codeword weight decision , correlation analysis and iterative decoding suitability ( IDS ), is proposed .

低重分配概率的OVSF码重分配算法

OVSF code reassignment algorithm with low reassignment probability

本文基于卷积码重传体制，应用分组码和卷积码串行级连码的概念，提出了一种串行级连结构的H-ARQ体制。

In this thesis , a new H-ARQ scheme that uses progressively decodable serially concatenated codes for retransmission is proposed .

在3GPP交织器中使用了新的方法&基于低码重分布的优化能量分配法，它是将不同的能量分配给不同重量的码字。

In the 3GPP interleaver , a new scheme for optimal energy allocation based on the distribution of low weight codewords which allocates energies to the different codewords that have different weights is employed .

基于低码重分布的一类随机交织器设计

Design of random interleaver based on the distribution of low weights of turbo codes

给出了一个基于统计概念的码重分布算法一逐重量统计法。

An algorithm of computing the distributions of the weight of codewords of Turbo codes , named statistics per weight , based on the statistics is presented .

当交织长度在数百范围内时，可以取得很精确的结果，尤其适合于计算低码重分布。

When the interleaving length is not very long , such as no longer than 500 bits , it can bring out very accurate results , especially for the distributions of low weight codewords . 3 .

基于二次算术同余交织器的构造算法，提出了对线性同余交织器的改进，系统地分析了其参数的选择情况及对低码重分布的影响。

Based on the quadratic congruence interleaver , a new algorithm which is improved on the linear congruence is advanced , the choices of its parameters are analyzed systematically and The new algorithm has the effects on the low weight codewords distribution .

汉字型姓名转换为首音码的重码智能处理

Intelligent treatment of converting Chinese name to the first letter of spelling

在上述研究基础上本文又提出了一种实用的多码自适应重分配算法&MARC算法。

Based on above research , this paper proposes an applied multi-code adaptive reassignment control ( MARC ) scheme .

利用单根循环码与重根循环码关系，确定出所有能由短码长的四元循环码构造的线性量子码。

Using the relation of simple root cyclic codes and repeat root cyclic codes , the linear quantum codes that can be constructed from quaternary cyclic codes of short lengths are determined .

低重量种子序列对Turbo码低码重分布的影响

Influence of Low-weight Seed Sequences on Low-Weight Distributions of Turbo Codes

基于最大距离分割（MDS）码的码重分布，得到了不完全译码器中发生译码错误和译码失败的概率。

Based on the weight distribution of MDS codes , the probabilities of decoding error and decoding failure for incomplete decoder were obtained .

研究了二元等距码、等重等距码及其距离分布的Q-变换。

Q-transform of distance distribution of binary equidistant codes and equidistant constant weight codes were studied .

通过使用Q-变换分布的性质，研究了二元等距码和等重等距码的最大码字数并得到2个新的上界，这些上界在某些情况下优于已知的结果。

By employing the properties of Q-transform , the maximum number of codewords of binary equidistant codes and equidistant constant weight codes were studied and two upper bounds were then obtained . These two bounds are better than previous known results in certain cases .

分解法求Turbo码的低码重分布

Decomposition method to calculate the distribution of low-weight codewords of Turbo codes

Turbo码的低码重分布特性研究

Research on the Distributions of Low-Weight Codewords of Turbo Codes

介绍了Turbo码的低码重分布及几种计算方法；

The low weight distribution of turbo codes is illustrated , and some methods which calculate the low weight distribution are described .

本文主要对Turbo码的低码重分布及其应用方面进行了探讨研究。

In this dissertation , a deep study is taken on the distributions of low weight codewords of Turbo codes and the applications .

由于Turbo码的低码重距离谱的分布特性是衡量Turbo码以及RCPT码性能的重要指标，文章对Turbo码的低码重距离谱的分布特性及其计算方法进行了研究。

Then , the characteristics of low weight codewords which will impact on the performance of Turbo codes and RCPT codes is studied .

本文提出达到Johnson上界的等重码和最佳等重检错码存在的一些充分条件。

This paper presents the sufficient conditions for the constant weight codes which can meet the Johnson 's upper bound and for the existence of the optimal constant weight error-detecting codes .

用概率的方法，分析了不同重量的种子序列经过交织后仍为种子序列的概率，讨论了低重量的种子自结尾输入序列对Turbo码的低码重分布的影响。

Using the probability method , the probabilities of a seed sequence is still a seed sequence after inter-leaving are calculated . The influence of the low-weight seed sequences on the low weight distributions of Turbo codes is discussed .

非线性等距码和等距等重码的上界

Upper Bounds for q-ary Nonlinear Equidistant Codes and Equidistant Codes with Constant Weight

基于特征码的网页去重

Duplicated Webpages Deletion Based on Feature Code

主要的性能参数有码长、码重、自相关限、互相关限，以及码集构造的复杂性等。

Their code length , code weight , auto-correlation , cross-correlation and complexity of constructing the codes , which are also important evaluation factors .