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1
说明： This .rar file include two .m files. It s simple simulation of cdma and DSSS. Hope it will help you understand the theory.
- 2011-05-13 15:42:46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
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xitong6tongbu
滑膜控制，实现系统滑模同结构控制，分数阶与整数解的同步(Synovial control, sliding mode structure control, fractional and integer solution to achieve synchronization with)
- 2021-04-01 10:19:08下载
- 积分：1
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som_all123
convert the c code to matlab compatible When executing, you need both c file and the m-file
- 2010-11-27 02:55:03下载
- 积分：1
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DoubleSpiral
The matlab code for the double spiral problem ( classification in data mining )
- 2011-06-07 15:09:41下载
- 积分：1
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Multipath-
多径传播的部分代码，包括傅里叶变换，傅里叶反变换，幅频和相频特性(Multipath propagation part of the code, including Fourier transform)
- 2011-06-29 20:27:51下载
- 积分：1
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lingmindu
灵敏度分析源程序，可用于结构模型修正，但仅运用了自振频率信息，没有运用振型信息(Sensitivity analysis of source code, can be used for structural model updating, but only the use of natural frequency information, there is no information on the use of modal)
- 2021-05-16 10:30:02下载
- 积分：1
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butterworthbpf
Butterworth Bandpass Filter
- 2013-10-03 21:43:43下载
- 积分：1
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toup
taup 变换MATLAB代码 可以自己修改(taup transform MATLAB code can make changes to)
- 2010-08-11 10:24:14下载
- 积分：1
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au3
AU3脚本语言 基本语法学习 对于学习au3的或许有些帮助(AU3 script language to learn basic grammar, perhaps for some help learning au3)
- 2010-08-19 16:29:54下载
- 积分：1
