Description: 硕士学位论文:LDPC码在瑞利衰落信道中的性能分析
信道编码技术可以带来编码增益，节省宝贵的功率资源，己经成为现代数字
通信系统中必不可少的关键技术。LDPC码采用低复杂度的迭代译码算法，且具有
逼近香农限的性能.由于LDPC码具有诸多优点，它在信息可靠传输中的良好应
用前景己经引起学术界和rr业界的高度重视，成为当今信道编码领域最受瞩目的
研究热点之一。
本文主要探讨了LDPC码在瑞利衰落信道中的性能，基于LDPC码的分组空
时码系统，以及基于LDPC码的正交频分复用系统.-master's degree thesis : LDPC codes in Rayleigh fading channels Performance Analysis channel coding technology can bring coding gain, Power saving valuable resources have become modern digital communication systems essential to the critical technologies. LDPC low complexity of the iterative decoding algorithm, having approximation Shannon limit performance. Because LDPC has many advantages, It reliable transmission of information in the application of good prospects has been caused rr academia and industry are taking, become the channel coding areas of the most watched one of the hot spots. This paper mainly discusses the LDPC Rayleigh fading channels in the performance Based on LDPC a space-time coding system, and based on LDPC orthogonal frequency division multiplexing system. Platform: |
Size: 2362368 |
Author:daniel |
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Description: ldpc编码，完整的编解码过程，并有多个编码实例-LDPC codes, the complete codec process and a number of coding examples Platform: |
Size: 47104 |
Author:人狼 |
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Description: [LDPC码]是LDPC码相关论文
[WuYuFei]中是WuYuFei的论文
[WuYufei_matlab]是WuYufei做Turbo码的Matlab程序
程序实现在固定信噪比和卷积长度的条件下，计算不同正常的帧错误概率和比特错误概率
turbo_sys_demo.m是主程序
其中trellis.m是构造网格的子程序
logmapo.m是LOGMAP译码算法子程序
sova0.m是SOVA译码算法子程序
encoderm.m是编码子程序
[22]是以WuYufei程序的改动，实现在帧长、信噪比和迭代次数固定的情况下，获得两个译码器的先验信息的变化情况
http://www.pudn.com
-[LDPC Code] LDPC code is a relevant paper [WuYuFei] is WuYuFei paper [WuYufei_matlab] is to do WuYufei procedures Turbo Codes Matlab program signal to noise ratio at a fixed length and convolution conditions, different normal frame error probability and the bit error probability is turbo_sys_demo.m main structure of which is trellis.m grid is logmapo.m Subroutine Subroutine LOGMAP decoding algorithm is the SOVA decoding algorithm sova0.m Subroutine Subroutine encoderm.m coding [22 ] WuYufei procedure is based on changes in帧长realize, signal to noise ratio and a fixed number of iterations circumstances, the acquisition of two decoder a priori information changes http://www.pudn.com Platform: |
Size: 1771520 |
Author:李灵 |
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Description: 引入PEG（Progressive-edge-growth）算法来构造适合线性时间编码的LDPC校验矩阵，译码时采用简化最小和Min-Sum译码算法实现简化译码．仿真结果表明，该方法能够构造适合LDPC码的线性时间编码的下三角校验矩阵日，并且用此方法构造的LDPC码性能非常接近原来PEG算法构造的LDPC码．同时通过采用最小和Min-Sum算法降低译码复杂度．-The introduction of PEG (Progressive-edge-growth) algorithm to construct suitable for linear time encoding of LDPC check matrix, decoding simplified when the smallest and the Min-Sum decoding algorithm decoding simplified. Simulation results show that this method can construct LDPC codes suitable for linear time encoding on lower triangular calibration matrix, and constructed using this method the performance of LDPC code is very close to the original PEG algorithm constructed LDPC codes. At the same time through the use of the smallest and the Min-Sum decoding algorithm to reduce complexity. Platform: |
Size: 168960 |
Author:卡卡 |
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Description: LDPC编码调制系统中基于反馈LLR均值的迭代解调／译码算法-LDPC coded modulation systems based on iterative feedback from the mean LLR demodulator/decoding algorithm Platform: |
Size: 203776 |
Author:jinliang |
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Description: wimax 标准中码率为1/2，码长为2304 的ldpc码的硬件实现编码及译码算法-wimax standard rate of 1/2, code length 2304 of the ldpc code encoding and decoding algorithm for hardware implementation Platform: |
Size: 20480 |
Author:zhangyang |
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Description: 关于LDPC编码的相关程序，包括不同的编译码算法，希望能和大家共享-LDPC codes on the relevant procedures, including the different encoding and decoding algorithms, hope to share Platform: |
Size: 10520576 |
Author:lsj |
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Description: LDPC编译码算法，主要研究编码效率、帧长与吞吐量的三维关系。文件ldpcBER.m为运行文件，其他文件为函数文件。-LDPC encoding and decoding algorithms, the main research coding efficiency, frame size and throughput 3D. The file ldpcBER.m run the file, other files as a function of the file. Platform: |
Size: 9216 |
Author:candy |
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Description: 该代码是实现LDPC编译码的C语言实现，编码采用的IRA LDPC编码算法，而译码采用的是对数域上的BP算法（LLR BP 算法），该代码先是实现了LDPC代码的编码过程，然后在通过LLR BP算法一步一步实现译码过程。译码主要过程有：初始化过程，校验节点更新过程，比特节点更新过程，最后进行译码判决，如果满足译码要求或者达到迭代最大次数则退出，否则返回到校验节点更新继续往下循环执行。(This code is to achieve the LDPC code by the C language, use IRA LDPC encoding algorithm , decode is LLR BP algorithm, first of all, the code is to achieve the encoding process of LDPC code, and then one step by step to achieve the decoding process through the LLR BP algorithm. The main process of decoding: initialization process, check node update process, bit node update process, finally decoding judgment, if meet the requirements or the maximum number of iterative decoding is out, or return to the check node update continued execution cycle.) Platform: |
Size: 805888 |
Author:tmh
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Description: 本文基于 CCSDS 标准上的算法详细研究了校验矩阵的生成算法、快速编码算法、最小 和译码算法，通过仿真对掌握的情况进行验证。虽在文章中最后没有给出在硬件上实现的情 况，但是在硬件上实现时各模块的设计进行了较为详细的介绍，后续工作证明它是行之有效 的。(In this paper, based on the algorithm of CCSDS standard, the generation algorithm of parity check matrix, fast encoding algorithm, minimum and decoding algorithm are studied in detail, and the simulation is verified by simulation. Although in the article finally did not give in the hardware realization situation, but in the hardware realization, each module design has carried on the more detailed introduction, the follow-up work has proven it to be effective.) Platform: |
Size: 231424 |
Author:夏妩
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