Study on Synchronization Mechanism in Digital Communication System Based on Pilot Channel; Code for construction of SDH project of railway optical fiber cable communication 数字通信系统中导频同步信号处理技术研究铁路光缆通信同步数字系列工程施工规范
Consequently a practical algorithm is provided for spread spectrum communication and channel code to use irreducible polynomials. 这样,为扩频通信与信道密码利用不可约多项式提供了一种实用的算法。
1948, Shannon clarified the noised channel code theory in the thesis "A Mathematical Theory of Communication", which is the foundation of error-correcting codes. 1948年,香农[2]在他的论文通信的数学理论中,首次阐明了在有扰信道中实现可靠通信的方法,提出了著名的有扰信道编码定理,奠定了纠错码的基石。
Based on the complicated noise characteristics in digital holographic storage system ( DHSS), some methods of channel code in digital communication are introduced. 针对数字体全息存储系统(DHSS)中复杂噪声的特点,从数字通信中信道编码的观点出发,讨论了采用数字信号处理方法来抑制DHSS中噪声干扰的技术。
The 6 ∶ 8 constant weight modulation code ( CWMC) is an effective channel code for the holographic storage channel. 6∶8等重调制码是全息存储记录通道中的一种有效通道码。
Firstly, a few of fundamental theories of channel code are introduced; 本文第一部分讨论了信道编码的基本原理;
A Research on Technology of Channel Code in Dual-Mode Transponder 星用双模应答机中纠错编码技术的研究
Channel Code Performance of ATSC HDTV ATSC的HDTV信道编码的性能分析
Finally, referring to the H.263 video transmission system, this paper discusses the optimization of the INTRA rate and the channel code rate in the video transmission system based on H.26L to achieve the best overall performance of decoded video. 263的视频传输模型,研究了基于H.26L的视频传输系统中帧内刷新率和信道编码效率的参数最优化问题以获得最佳视频质量。
The principles of source code and channel code are expatiated. The presentations of HDLC procedure, CRC, ARQ are given. The ECM transmission of the facsimile document is implemented on Visual C++ 6.0 platform. 详细阐述了信源、信道编解码原理,对HDLC规程、CRC校验、ARQ差错控制方式进行详细介绍,并在Visualc++6.0平台上实现了传真报文的ECM方式传输。
A joint source-channel rate-distortion estimation model is used to optimize the rate allocation between source and channel code. 考虑采用一致的信源信道联合统计率失真模型作为约束,根据信道的传输带宽和平均丢包率,联合优化信源编码码率和非均匀FEC编码码率的分配。
In order to satisfy the need in a variety of services and the high data rate, LDPC code is used for channel code in the B3G-system. 为了满足多种业务和高数据率的需求,“B3G”系统方案采用了LDPC码作为纠错编码。
The paper studies several key techniques in CCSDS and analyzes the performance of multiplexing mechanism and telemetry channel code. 本文对CCSDS标准中的几个关键技术进行了研究,分析了多路复用及遥测信道编码的一些性能。
Summarized the digital TV's international development, depicted digital TV DVB-T criterion and the shape of MPEG-2 TS, the channel code method and COFDM modulation for terrestrial transmission. 详述数字电视DVB-T标准,MPEG-2TS传输码流的形成;专门针对地面传播的信道编码技术和COFDM调制方式。
Firstly, this paper reviews the history of channel code and presents the status of Turbo codes, recommends the code-decode structure and basic principle of Turbo Code. Some decoding algorithm of Turbo codes in common use are compared in their capability and complexity. 本文首先回顾了信道编码学科发展历史,介绍了Turbo码的研究现状及基本特性,分析了Turbo码编译码结构和基本原理,比较了常用Turbo译码算法的性能和复杂度。
The time for searching the optimal rate set is reduced when using the channel code rates for equal error protection as the initial condition of the genetic algorithms. 将等误差保护码率作为遗传算法的初始种群,减少了最优码率集的搜索时间。
Channel-Optimized Transform Coding& A New Approach of Joint Source Channel Code 信道最优的变换编码&联合信源信道编码的一种新方法
Secondly, a few of fundamental theories of channel code and several kinds of common channel codes are introduced. 其次,介绍了信道编码的基础理论和几种常用的信道编码。
To overcome the disadvantages of error control in H.26L, this paper discusses a useful channel code, Reed-Solomon ( RS) Code. 针对H.26L在差错控制方面的不足,本文研究了一种实用的信道编码&Reed-Solomon(RS)码。
Analysis and Treatment Methods of Nortel Networks DWDM System Channel Error Code 北电DWDM系统波道误码的分析及处理方法
Meanwhile, the use of OVSF code as channel code can be used to support multi-rate data transmission, which is to assign OVSF codes according to the calling rate. 同时,采用0vsF码作为信道化码可以用来支持多速率数据传输,即根据呼叫请求的速率分配相应的0vsF码。
Channel code is one of the key technologies in the future wide-band wireless communication system. As a class of error-correcting codes that has performance approaching Shannon limit, low-density parity-check ( LDPC) codes is a hot topic in the research area of channel code. 信道编码技术是未来宽带无线通信系统中关键技术之一,而LDPC(LowDensityParityCheck,低密度奇偶校验)码具有逼近Shannon限的性能,是信道编码研究领域的一个热点。
The performance of systems based on both channel code and differential detection is better than the system only based on differential detection. 联合信道编码和差分检测的WOCDMA系统性能更优于只基于差分检测的系统。
At the same time, the paper analyzed and summed up the application of channel code in the DMR system voice and data services, besides, it simulated the performance of two kind of business. 同时,分析和总结了各码型在DMR系统语音和数据业务中的应用情况,并对这两种业务的性能进行了仿真。
To approach the performance of MIMO channel capacity, channel code is usually employed to combat interference, noise and fading. 为了获取接近MIMO容量极限的性能,常常还必须依赖于信道编码技术来有效地对抗干扰、噪声和衰落。
Through simulation and analysis, we know that adding channel code can improve the whole performance of PLC system. 通过仿真分析,证明加入信道纠错编码能够显著提高电力线通信系统的整体性能。
At the same time, T. E. Hunter s major contribution was proposing coded cooperation. It is more flexible and can choose channel code according to the channel conditions and other factors. Furthermore, it can adjust transmission speed as need. T.E.Hunte提出了结合信道编码的编码协作,该协议相对比较灵活,可以根据信道条件或者其他因素选择合适的信道编码,同时也可以调节传输速率。
Low-Density Parity-Check ( LDPC) code is a class of channel code with excellent error control performance. 低密度校验码(LDPC)是一种优秀的信道编码方案。
To further improve the power efficiency, CPM as a inner code can be serially concatenated with the binary CC ( Convolutional Code) as a outer code, which is a system both has the channel code and the modulation. 可以利用这一点将CPM就作为内码和作为外码的二进制卷积码(CC:ConvolutionalCode)串行级联以提高功率利用率,它们共同构了成一个编码调制在一起的系统。