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ofdm
摘要:正交频分复用(OFDM)是第四代移动通信的核心技术。该文首先简要介绍了OFDM基本原理,重点研究了理想同步情
况下,保护时隙(CP)和不同的信道估计方法在高斯信道和多径瑞利衰落信道下对OFDM系统性能的影响。在给出OFDM系
统模型的基础上,用MATLAB语言实现了整个系统的计算机仿真并给出参考设计程序。最后给出在不同的信道条件下,保
护时隙、信道估计方法对OFDM系统误码率影响的比较曲线,得出了较理想的结论。
(O FDM is the key techno logy of 4G in the field of mobile comm unication.In this article O FDM
ba sic p rinc ip le is briefly in troduced.Then,the influence of CP and d iffe rent channe l e stim a tion on the system
pe rfo rm ance is emp ha tica lly analyzed respectively in Gauss and R ayle igh fading channe ls in the cond ition of ideal
synchronization.B e sides,based on the given system mode l O FDM system is compu te r sim u la ted w ith MA TLAB
language and the refe rentia l design p rocedure is given.Fina lly,the B ER cu rves of CP and channe l e stim ation a re
given and comp ared.The conclusion is sa tisfac to ry.
)
- 2009-06-01 16:10:00下载
- 积分:1
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speechtimefre
speechtimefre 语音时域处理(speechtimefre voice at the Domain)
- 2006-06-06 21:37:17下载
- 积分:1
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houghpeaks00
不用多说了,和Hogh搭配使用检测直线的程序
直线Hough变换利用图像空间和Hough参数空间的点-线对偶性,把图像空间中的检测问题转换到参数空间。通过在参数空间里进行简单的累加统计,然后在Hough参数空间寻找累加器峰值的方法检测直线。(Needless to say, Hogh mix and the use of linear detection procedures Hough transform space and the use of images Hough parameter space The point-line duality, the image space detection switch to the parameter space. Through the parameter space for a simple cumulative statistics, then Hough parameter space for accumulator peak detected straight.)
- 2007-01-18 14:42:02下载
- 积分:1
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Zbuildpi
this source code is zbuildpi matlab
- 2013-08-04 17:38:42下载
- 积分:1
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Order-disorder
有序无序转变的计算机模拟——MC算法
一个样品做实验,从低温有序相,逐渐升温,到高温无序相。
模型假设:
1 模拟三维简单斜方,AB型合金,共有M*N*L个原子;
2 最邻近假设,即只考虑最邻近原子之间的相互作用,次邻近和更远的原子之间的作用忽略(误差较大),
,在简单斜方中,最邻近原子数z=6;
3 只考虑势能的作用,AA,BB,AB原子间的作用用Eaa,Ebb,Eab=Eba表示 且忽略振动能(原则上,温度很高时,不能忽略)等;
4 各原子之间的相互作用独立,即各化学键相互独立;
5 边界原子任然周期排列,只不过,邻近原子数减小,能量较高;边界面上的原子z=5;线
上的原子z=4,顶点上的原子z=3;由于顶点上只有四个原子,算法中不考虑这种情况;
6 其它假设。( Order-disorder transition of computer simulation- MC algorithm a sample experiment, from the low-temperature ordered phase, gradually warming up to a high temperature disordered phase. Model assumes that: 1 of three-dimensional rhombic, AB-type alloy, a total of M* N* L atoms 2 nearest the assumption that only consider the interaction between the neighboring atoms, and further sub-adjacent atoms ignore the interaction between the (larger error), , in the simple oblique Fang, nearest neighbor atoms, z = 6 3 only consider the potential role, AA, BB, AB interatomic with Eaa, Ebb, Eab = Eba representation and ignore the vibration energy (principle, the temperature is high, it can not be ignored), etc. 4 each atom interactions between independent, which means that each bond independently 5 boundary periodic arrangement of atoms in any course, but , adjacent atoms decreases, the higher energy boundary atomic plane z = 5 atoms on line z = 4, the vertex atoms z = 3 only four)
- 2013-05-23 20:17:12下载
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regional-a-node-encoding
有限元 混合边界泊松方程 区域编码 局部编码 节点总体编码 影响元素集和影响节点集 Matlab源程序(Matlab code for Poisson equation with mixed boundary condition)
- 2013-05-24 17:19:27下载
- 积分:1
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matlab视频背景提取
matlab简单方式视频背景提取,通过取中值的方法得到背景(Matlab simple way video background extraction, through the median method to get the background.)
- 2017-10-15 22:13:40下载
- 积分:1
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cw5
matlab中CW脉冲的源程序,经过仿真验证的(matlab source code in the CW pulse, after simulation of)
- 2008-01-08 16:15:49下载
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MATLAB
说明: matlab主要函数指令表,按功能分类,非常方便好用的。(The main function matlab instruction sheet, according to the functions of classification, very easy-to-use.)
- 2008-11-12 11:16:44下载
- 积分:1
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hrf
It shows the basic shape of a Haemodynamic Response Function (HRF), how to convolve an HRF with a time-series of stimulus onsets in order to produce a predicted fMRI signal, and how to plot the results in Matlab. The program also shows what happens when closely-spaced stimuli produce HRFs which overlap in time and linearly sum.
- 2012-08-07 13:06:40下载
- 积分:1