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Description: 在QPSK下的OFDM误码率仿真程序，其中包含comb.m，delay.m，fade.m，giins.m，girem.m，ofdm_fading.m，qpskdemod.m，qpskmod.m，sefade.m这些文件
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Size: 6976 |
Author: 梁超 |
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Description: 在QPSK下的OFDM误码率仿真程序，其中包含comb.m，delay.m，fade.m，giins.m，girem.m，ofdm_fading.m，qpskdemod.m，qpskmod.m，sefade.m这些文件-Of OFDM in the QPSK BER simulation program, which includes comb.m, delay.m, fade.m, giins.m, girem.m, ofdm_fading.m, qpskdemod.m, qpskmod.m, sefade.m these documents
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Size: 7168 |
Author: 梁超 |
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Description: 根据OFDM的基本原理, 利用MATLAB编写
OFDM系统仿真的程序,通过分步执行,能够比较清
楚地了解OFDM实现的整个过程,熟悉每一步变化
的数据特征。对掌握OFDM的原理和熟悉MATLAB
仿真都是非常重要的,仿真的最后给出了该OFDM
系统仿真的误码率。其中qpskmod.m 为QPSK调制
的函数 qpskdemod.m 为QPSK解调的函数 comb.m
为产生加性高斯白噪声的函数 giins.m 为往信号中
插入保护间隔的函数 girem.m 为从接收信号中去除
保护间隔的函数。这部分函数分别由相应的子程序
实现,文中没有给出源代码。-Orthogonalfrequencydivisionmultiplexing (OFDM) isamulti 2carrierbroadbandmodulation
technique.ThemainadvantagesofOFDMexistinbetteruseofthebandwidthandbetterperformanceof
antimultipath interferenceanditisadaptivetohigh 2dada2ratewirelesscommunicationsystems.Thispaper
analyzed OFDMtechniqueanditsimplementationprincipleandmadeuseofMATLABtosimulatethe
transmissionperformanceofOFDM.Theresultsofcomputersimulationarealsodiscussed.
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Size: 128000 |
Author: 田静 |
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Description: comb(int m,int k)，用归纳法求解m个数集合中的所有k子集-comb (int m, int k), m the number of induction to solve the set of all subsets of k
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Size: 223232 |
Author: yehui |
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Description: MATLAB MIMO-OFDM信道估计仿真.m文件。基于梳状导频环境。-MATLAB MIMO-OFDM channel estimation simulation. M file. Comb based pilot environment.
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Size: 3072 |
Author: 肖笛 |
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Description: 提出了一种基于非下采样 Contourlet变换 ( NSCT)和马尔科夫随机场 (MRF)相结合的纹理图像分割算法。算法包括两
个步骤, 首先通过 NSCT实现对图像纹理特征的提取, 并使用模糊 C-均值完成对图像的初始分割 然后将初始分割结果用 MRF模型
表示, 通过贝叶斯置信传播得到图像的最终分割结果。实验结果表明, 对于纹理图像,该方法在分割错误率、 区域一致性以及边缘的
准确性方面都比传统小波变换的方法有了明显的改善。-A tex ture i m age seg m entation a l go rithm based on comb i nati on of non-down sa m pling Contourlet transfor m ( NSCT) andM arkov
rando m fi e l d model is proposed . The algorithm consists o f t wo steps . F ir st , the tex t u re f ea t ure of i m ag e is ex trac ted by NS CT, and the i m age
is seg m ented i n itia lly by fuzzy c- m eans Second , the pr i m aril y seg m ented results are expressed byMRF mode, l and the fi nal seg m entati on re-
s u lts are ga i ned v i a Bayes beli e f propag ati on . The exper i menta l resu lts show tha t this a l gor it hm is effecti ve fo r tex t ure i m age , it prov i desm uch
better res u lts i n erro r ra te o f segm enta tion , reg ion ho m ogene ity and edge accuracy than tho se of trad iti onal w ave let transf o r m ing m ethods
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Size: 216064 |
Author: jjdjjf |
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Description: 二维最大熵法和二维最小交叉熵法是目前常用的两种阈值分割方法, 但在某些时候因为两种方法获取的阈
值过高或者过低, 使得分割失效。针对此问题, 提出了基于二维最大熵法和二维最小交叉熵法结合的图像分割方法。
首先, 对二维最小交叉熵公式进行转化 然后, 利用多目标规划理论将这两种方法有机结合使得到的阈值既满足二维
最大熵原则, 又满足二维最小交叉熵原则 最后, 利用二维直方图的特点推导出新型递推算法搜索最佳阈值并降低计
算复杂度。-The thresho ld ing method based 2-D max imum entropy and the one based on 2-D m inimum cross
entropy are used w ide ly in im age segmentation today, bu t in some app lications, they fa il to segment im ages
because of too h igh or too low thresho lds. Therefore, we proposed an im age thresho ld ing m ethod based on
the comb ination of 2-D max imum entropy and 2-D m inimum cross entropy. Firstly, the formula of the 2-D
m in imum cross entropy w as transfo rmed, then 2-D max imum entropy and 2-D m inimum cross entropy w ere
combined together usingmult-i objective prog ramm ing theory so that the optima l thresho ld value could satisfy
the threshold requirem ent of the bo th. A new recursive algo rithm w as in ferred using the features o f the 2-D
h istogram in order to search the best thresho ld vecto r and to reduce the compu ting complex ity
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Size: 1525760 |
Author: rambolyb |
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Description: 将基于混合差分策略的改进差分进化优化算法应用在PID控制器在线优化中。MDE( 改进差分
进化算法)结合了差分策略DE / rand /1的多样性和DE /best/1的高收敛速度的优点, 算法的寻优性能远超过两
种策略单独作用时的性能。此方法充分利用了差分进化的进化寻优优势与PID控制器的简单方便, 让控制器
在系统运行过程中进行自我设计和优化。-Th is pape r presen ts a new m ethod a m odified d ifferential evo lution algor ithm s(MDE) fo r the the
on line optim ization of PID Contro ller, whereDE/rand /1 and DE /best/1 run currently. MDE comb ined ba th them er its
of the high convergence rate me rit of the DE /best/1 and the mu ltiplic ity of DE /rand/,l the algor ithm optim ization perform
ance for surpasses the tw o strateg ies aoplicd individually.
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Size: 423936 |
Author: asda |
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Description: 从n个数中取m个数的的排列数和组合数。 取出方式多样，可放回，也可不放回。
-compute the permutation and combination numbers of taking m numbers n numbers.
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Size: 128000 |
Author: 张俊 |
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Description: 在QPSK下的OFDM误码率仿真程序,其中包含comb m,delay m,fade m,giins m,girem m,ofdm_()
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Size: 4096 |
Author: codtrack
|
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Description: 在QPSK下的OFDM误码率仿真程序,其中包含comb m,delay m,fade m,giins m,girem m,ofdm_()
Platform: |
Size: 4096 |
Author: AN+746066 |
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Description: 在QPSK下的OFDM误码率仿真程序,其中包含comb m,delay m,fade m,giins m,girem m,ofdm_()
Platform: |
Size: 6144 |
Author: ruyq%25252521377 |
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