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mod_zulu-1.5.4-2
zulu component for joomla
- 2009-11-27 23:55:55下载
- 积分：1
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CDMA
CDMA多用户检测的Simulink仿真研究(CDMA multi-user detection of Simulink Simulation)
- 2010-05-06 10:31:58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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Simulink_for_Teaching_DSP_Examples
用于数字信号处理教学中的基于simulink的实例(The examples provided in this file can be used to teach signal processing courses.)
- 2009-09-16 14:46:09下载
- 积分：1
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MPPver1p6
Matlab preprocessor that replaces macros with their names
- 2010-11-12 01:43:12下载
- 积分：1
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1
说明： 改程序能求得卫星下行链路的传输速率和覆盖面积的关系(Procedures to obtain the relationship between the satellite downlink transmit date rate and coverage areas )
- 2009-07-24 03:16:37下载
- 积分：1
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Abstract
it s a communication document
- 2014-11-15 15:00:56下载
- 积分：1
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comparison_21022013
COMPARISON OF DIFFERENT MODULATION SCHEMES
- 2013-11-14 16:30:45下载
- 积分：1
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hht
中央大学的hht变换程序，需要下载tbf时频工具箱(Central University hht transform the program, you need to download tbf frequency toolbox)
- 2012-11-16 22:37:34下载
- 积分：1
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xiaofang
城市消防站点选址问题的代码 用于求出两点间最短距离以及选址最佳坐标(City Fire Station Location code is used to calculate the shortest distance between two points and the location of the best coordinate)
- 2012-08-14 09:05:29下载
- 积分：1
