理论 theory 理论学习 study of the theory; 理论联系实际 integration of theory with practice; unite theory with practice; 理论脱离实际 theory divorced from practice; discrepancy between theory and practice; 在理论上 in terms of theory; on the theoretical plane; theortically; 理论队伍 theoretical contingent; 理论概括 theoretical generalization; framework; 理论根源 theoretical source; 理论工作 theoretical work; 理论公式 theoretical formula; 理论化 theorization; 理论基础 rationale; 理论家 theoretician; 理论价格 theoretical price; 理论科学学 theoretical science of science; 理论框架 theoretical frame; 理论轮廓 theoretical profile; 理论骗子 theoretical swindler; 理论水平 theoretical level; 理论思维 theoretical thinking; 理论素养 theoretical attainment
Discourse upon the theory of iterative decoding about turbo code , and give the decoding algorithm over awgn channel , in chapter 2 ; 3 . give the iterative theory and simulate its performance over awgn channel in chapter 3 ; 4 . research and analyze turbo decoding algorithm corresponding to the characters of rayleigh channel as well as simulating its performance when using in 3g in chapter 4 ; 5 本文的研究与分析,主要集中在:第一章介绍了信道编码理论与技术的发展,讨论了turbo码的发展与应用;第二章论述了turbo码的迭代译码原理;第三章描述了awgn信道上turbo码的译码算法,作了awgn信道上的仿真;第四章针对rayleigh信道的特点,结合信道特性,研究分析了turbo码译码算法,进行了相应的性能仿真;第五章对ldpc码进行了初步的分析与讨论,把turbo码与ldpc码的性能进行了比较。
In other words , bits of data from the same messages are no longer bounded by the same packet . instead , pieces from different messages are coded during transmission and decoded upon reaching their destinations . in this way , communication over the network would be more flexible , leading to enhanced capacity and efficiency 换句话说,属于同一讯息的位元无须再像现时般处于同一数据包,网络编码理论会自动把不同的讯息进行编码、当到达目的地时再重新组合,这样便大大提高了网络的容量和效率。
As is well know that turbo codes and multiuser detection ( mud ) are among the most important techniques in the third generation ( 3g ) mobile communication , turbo codes are recognized as having the performance closed to the shannon limit and be regarded as the milestone on channel coding theory Turbo码和多用户检测是第三代移动通信的关键技术之一,也是未来通信的重要研究课题。 turbo码具有近shannon限的性能,它的出现被看作是信道编码理论发展史上的一个里程碑。
The background and research situation of ldpc codes are presented and the current research results are introduced in the first part of the thesis . graph presentation and sum - product algorithm are interpreted in detail . linear coding theory and efficient constructing methods on ldpc codes are systemically interpreted later 系统地阐述了ldpc码的图模型表示方法及基于图模型的译码原理;详细地介绍了ldpc码的构造方法及其线性编码理论;介绍了用于ldpc码阈值分析和度序列设计的密度进化理论; 2
By first reviewing the basic video coding theory and then analyzing kinds of sub - module in video coding system . adaptive overlapped block motion compensation ( aobmc ) is combined with pds technology for temporal prediction . the system composed of hybrid transform coding and motion compensation prediction coding is constructed 第五章讨论了本文运动估计和运动补偿方法在视频编码中的应用,首先阐述了视频编码理论和编码系统各个子模块的基本原理,然后在预测性菱形搜索和自适应重叠块运动补偿基础上运用变换编码加运动补偿的预测编码方法实现一个混合视频编码的方案。
In the first chapter , the basis of communication and channel coding theory is introduced briefly , the present situation of the development of error - correcting code and ldpc codes are pointed out . the second chapter introduces the tdd beyond 3g system model , including the system ’ s demand , the system ’ s target and the system ’ s basic parameter 第一章介绍了通信系统、信道编码理论的基础知识、纠错码的发展状况, ldpc码的提出及其发展,第二章介绍了我校设计的tddbeyond3g系统模型,包括系统的设计要求、指标及系统的基本参数。
Our object is an intermediate frequency modem of a software defined radio transmitter - receiver of multi - service , multi - modulationmode and multi - processdatarate . first , related software defined radio theory is introduced ; later , channels of transmitter - receiver are designed with consideration of data format , modulation , fec , interwaving . and scrambling ; emphasis is placed on theory and implementation of an audio compression algorithm cvsd ( continuous variable slope delta modulation ) and a fec technique convolutional coding - decoding 本文首先介绍了相关的软件无线电理论;然后完成了包括数据格式,调制方式,纠错码方式,交织器和扰码器等部分的中频调制解调器通道设计;接着着重介绍了系统中使用的音频压缩算法cvsd (连续可变斜率增量调制)的原理和实现,以及作为前向纠错码的卷积码编码理论和编解码的高效实现。
The chapter one of the thesis introduces the development status of the present digital program exchange system and the main task of devising a new console ; chapter two gives the relevant theories about channel encoding ; chapter three simply introduces digital program exchange system named nd120 ; chapter four presents how to find out relevant data ; chapter five and six describe in detail the hardware structure and software structure of the new console respectively ; chapter seven demonstrates in detail the new interface of this console 论文第一章介绍了数字程控调度交换系统的发展现状和设计新型调度平台需做的主要任务;第二章详细介绍了调度平台的总体设计及相关的信道编码理论;第三章简要介绍了nd120数字程控调度交换系统;第四章描述了调度指令的提取过程;第五章和第六章分别介绍了新型调度平台的硬件结构和软件结构;第七章则详细描述了调度平台接口的设计过程,这也是本文的主要创新点。