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Matlab-simulation-DF-and-AF-source
该程序是使用Matlab仿真协同通信的DF（解码转发）基本性能，基本模型S-R-D三个节点，接收端使用MRC（最大比合并）。固定DF由于SR信道的错误，其性能受到限制，在大SNR情况下不能获得有效分集。而当SR距离足够近的时候，可能获得一定的分集增益。(The program is a cooperative communication using Matlab simulation DF (decode forwarding) basic performance, the basic model of the SRD three nodes, the receiver uses the MRC (maximum ratio combining). Fixed DF error of the SR channel, its performance is limited, can not obtain a valid diversity in the large SNR case. When the SR close enough, you may get some diversity gain.)
- 2012-04-19 14:48:23下载
- 积分：1
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5478
编写查找程序search，功能如下：给定任意有序数列，然后输入任意一数，用折半查找法找出该数在数列中的位置，若数列中有此数，则返回该数在数列中所在的位置，若数列中无此数，则返回-1 把给定值y插入到有序数组a（由大到小）中，插入后，数组中的数仍然有序 用递推法求解：一串字符以问号“？”结尾，顺序读入后反向输出，且统计其中字符的个数(prepare you search procedures, functions as follows : Given a series of arbitrary order, then enter an arbitrary number, using binary search method to find the few series in the position, if the series is this, Return of the few series in the location, if the series has been no such number,-1 is returned will be distributed to value y orderly array inserted into a (decreasing), insert after The array is an orderly with a few recursive method : a bunch of characters with a question mark "?" The end of the order after reading the reverse output and statistics on the number of characters)
- 2006-12-29 22:20:24下载
- 积分：1
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matlab-3
2D-DWT steganography using convolutional codes
- 2014-10-14 14:16:59下载
- 积分：1
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sf
灰色关联度算法，灰色系统分析方法针对不同问题性质有几种不同做法，灰色关联度分析(GreyRelationalAnalysis)是其中的一种(Grey algorithm, gray system analysis methods for different nature of the problem there are several different approaches, gray correlation analysis (GreyRelationalAnalysis) is one of them)
- 2013-08-25 20:02:47下载
- 积分：1
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ApEn
This program calculates Approximate Entropy of a given time series.
- 2014-02-10 03:57:53下载
- 积分：1
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EasyKrig3.0
kriging插值源码，matlab，EasyKrig3.0(kriging interpolation source code, matlab, EasyKrig3.0)
- 2010-10-20 17:16:34下载
- 积分：1
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RSC
RSC。源码。需要的拿去。注意不同于SRC。(RSC. Source code. Need to take. Note that unlike SRC.)
- 2013-11-16 21:36:53下载
- 积分：1
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QPSK-matlab
QPSK通过瑞利信道的MATLAB仿真,测试能成功(QPSK Rayleigh channel through MATLAB simulation, the test will succeed)
- 2008-12-18 10:29:45下载
- 积分：1
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fangzhen
实验一 双极性矩形随机信号的归一化功率谱密度一
1.1 功率谱密度简介
平稳过程的任何一个非零样本函数的持续时间为无限长，显然都不满足绝对可积和总能量有限的条件。因此，它的傅里叶变换不存在即没有频谱函数。所以我们用功率谱密度来表述其频谱特性。
随机过程的任一实现是一个确定的功率型信号。而对于任意的确定功率信号f(t)，它的功率谱密度为：
式中， 是f(t)的截短函数 对应的频谱函数。f(t)是平稳随机过程 的一个实现。而随机过程某一个实现的功率谱密度不能作为过程的功率谱密度。过程的功率谱密度应该看作是任一实现的功率谱密度的统计平均，即
虽然该式给出了平稳随机过程的功率谱密度，但我们通常都不利用这个式子来计算功率谱。我们知道，确知的非周期功率信号的自相关函数与功率谱密度是一对傅里叶变换。对于平稳随机过程，也有类似的关系，即
和
对于平稳随机过程我们通常先求出其自相关函数再利用上式求出其功率谱密度。
1.2 实验要求
1.了解平稳随机信号功率谱的概念及计算方法
2.仿真不同占空比，等概、非等概双极性矩形随机信号的归一化功率谱密度
3.分析不同信号所包含的频谱分量，有无直流分量和定时分量信息
(A pair of rectangular random experiment polarity signal sample return a nonzero function of any duration power spectral density of a 1.1 power spectral density of a stationary process Introduction of infinite length, apparently not satisfied absolutely integrable and the total energy of the limited conditions. Therefore, it is the Fourier transform of the spectrum that does not function does not exist. Therefore, we use the power spectral density to express their spectral characteristics. Any random process is a realization of a certain type signal power. For arbitrarily determined power signal f (t), its power spectral density is: wherein, is f (t) is a function corresponding to the truncated spectrum function. f (t) is a stationary random process of realization. The random process to achieve a certain power spectral density can not serve as the power spectral density of the process. Power spectral density process should be seen as a statistical average power spectral density of any r)
- 2014-11-30 20:39:29下载
- 积分：1
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muller
about muller method for solve lineer program
- 2010-02-15 21:53:55下载
- 积分：1
