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LDPC码编译码算法的研究与实现_李会雅
本文首先介绍了几种LDPC码的编译码算法,同时推导了译码错误概率和密度进化
过程,讨论了信道参数的门限效应。接着对LDPC码二分图中长度为4的环进行了深入
研究,提出了一种LDPC码校验矩阵的消4一环生成算法,采用Matlab和VC++融合编程
方式,完成了此算法的程序设计。此算法不仅可生成二进制LDPC码的校验矩阵,并且
对算法修正后,也可生成多进制LDPC码的校验矩阵。采用此算法后可避免LDPC码译
码过程中的重复迭代,显著提高了短帧LDPC码的误比特率性能。同时对不同参数对
LDPC码性能的影响进行了仿真,得到了一些结论。最后,利用VHDL语言在复杂可编
程逻辑器件(CPLD)上完成了LDPC码编码器的硬件实现。另外,给出了LDPC码译
码器硬件实现的整体结构图,结合对数似然比域内的置信传播迭代译码(LLR-BP)算
法,对译码器的各个模块进行了详细阐述。(Research and implementation of LDPC coding and decoding technology)
- 2018-04-08 18:48:44下载
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hht
HHT变换工具箱,里面含有EMD,边际谱等程序。希望大家喜欢(HHT conversion kit, which contains the EMD, the marginal spectrum and other procedures. Hope you like)
- 2010-10-26 15:38:26下载
- 积分:1
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bfsk
bfsk调制解调误码率仿真,需要用MATLAB来实现的好东西(bfsk modem bit error rate simulation, need to use MATLAB to implement the good stuff)
- 2010-05-11 16:30:02下载
- 积分:1
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matlab-code-for-signal-processing
this matlab code is for drawing histograms of distributed/normal random samples,basic operations on signals as addition, multipication,delay.Drawing spectrum of signal.
- 2012-08-18 01:54:26下载
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zhr_imfilter
本程序实现了matlab自带函数imfillter的功能,是.m文件的形式,参数和imfilter一样可选。程序附有图片,并且在程序最后使用imfilter,便于直接对比观察处理效果。注:本程序是读入RGB图像,转换成灰度图进行处理。(This program implements the function of matlab own function imfillter is. M file in the form of the same parameters and imfilter optional. Procedures with pictures, and last used in the program imfilter, for direct observation of treatment effect contrast. Note: This program is read into the RGB image into grayscale processing.)
- 2020-08-01 13:08:36下载
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Propagation_3D_planarmirror
说明: 三维双凹激光振荡,采用菲涅尔衍射和fox-li方法,得到两维幅度和相位输出。(Three-dimensional double-concave laser oscillation, using Fresnel diffraction and the method of fox-li, the two-dimensional amplitude and phase output.)
- 2009-08-10 20:54:47下载
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psk
psk modulation is done using simulink model in this document. hope u get knowledge
- 2013-02-05 12:19:07下载
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shortest-path
dijkstra计算最短路径,算法在优化、图像处理、网格处理等相关领域有非常广泛的应用,希望能借此机会了解其实质内容,并灵活应用其到所学领域中。(dijkstra calculate the shortest path algorithm optimization, image processing, mesh processing and other related fields have a very wide range of applications, hoping to take this opportunity to learn about its substance, and the flexibility to apply their learning to the field.)
- 2013-11-17 16:45:16下载
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maximumpower
this is maximum power detection.
- 2015-02-09 15:11:32下载
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1945wandy
matlab code matlab code(matlab code)
- 2010-09-04 19:53:47下载
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