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modulate_21Mc
对要发送的序列进行上变频，上变频到21MHz后进行发送。(change the frequence uop to the one that suit for transmission,which here is 21MHz.)
- 2009-03-30 12:54:13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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-matlab6.5verson_simulation
精通matlab6.5版_数值计算本章将花较大的篇幅讨论若干常见数值计算问题：线性分析、一元和多元函数分析、微积分、数据分析、以及常微分方程（初值和边值问题）求解等。但与一般数值计算教科书不同，本章的讨论重点是：如何利用现有的世界顶级数值计算资源 MATLAB。至于数学描述，本章将遵循“最低限度自封闭”的原则处理，以最简明的方式阐述理论数学、数值数学和 MATLAB计算指令之间的内在联系及区别。(matlab simulation)
- 2011-05-07 20:15:33下载
- 积分：1
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pinjie
图像拼接的matlab代码，可以作为参考(Image mosaic matlab code, can be used as reference)
- 2013-11-20 10:38:01下载
- 积分：1
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Benders分解(Games)
说明： 常规混整优化线性问题，采用GAMS编程，调用CPLEX实现Benders 分解(Conventional mixed-integer optimization linear problem, using GAMS programming, calling CPLEX to realize Benders decomposition)
- 2020-12-18 08:09:12下载
- 积分：1
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71348358pso
说明： 离散粒子群算法，改进的二值粒子群算法，可以正常运行(Discrete particle swarm optimization algorithm, improved binary particle swarm optimization algorithm)
- 2020-07-25 19:53:49下载
- 积分：1
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bp_pso
粒子群算法（PSO）优化BP神经网络，用来进行非线性的校正，效果良好(Particle swarm optimization (PSO) to optimize BP neural network, used for non-linear correction, to good effect)
- 2013-09-05 12:09:50下载
- 积分：1
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WSN_mac
wireless sensor networks are required to share one wireless channel among several
sensor nodes. An efficient media access control (MAC) protocol must be developed and implemented
on hardware. This MAC must be easily used by future users on the target hardware. The MAC should
avoid data collision and posses strong speed of transmission.
- 2014-02-07 14:58:02下载
- 积分：1
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3D-vector-field-simulator-GUI
There are two files with the same name (vectgui) in this archive.
One is Matlab figure file and the other one is Matlab M-file.
Please save them under the same directory which Matlab can access.
- 2012-11-29 15:28:06下载
- 积分：1
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Isomap
说明： Isomap流形降维算法，包括了一个瑞士卷生成数据，dijk距离算法。(Dimensionality reduction algorithm Isomap manifold, including the formation of a Swiss roll data, dijk distance algorithm.)
- 2011-04-13 22:14:51下载
- 积分：1
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