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example4_4
例4:在sinc(t)信号中叠加噪声,分析对应频谱
fs=100 采样频率,必须大于两倍基带信号最高频率
ts=1/fs 采样时间间隔
T=2 时间窗大小
(
x=x+0.1*randn(1,N)
x=awgn(x,-10, measured )
figure
plot(t,x)
title( 时域信号图 )
xlabel( t /s )
y=fft(x,N)
figure
if mod(N,2)~=0
N=N-1
end
f=linspace(0,fs/2,N/2)
plot(f,abs(y(1:N/2))*2/N)
title( 叠加噪声的sinc(t)信号频谱 )
xlabel( f /Hz )
figure
y0=y(1:N/2)
P=y0.*conj(y0)/N
P=10*log10(P)
plot(f,P)
title( 功率谱 )
xlabel( f /Hz )
)
- 2010-05-25 20:59:03下载
- 积分:1
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install_guide
MATLAB® SimulinkInstallation Guide
Release 2012a(MATLAB® & Simulink®
Installation Guide
Release 2012a)
- 2014-02-21 20:00:40下载
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POD
说明: 数据快照的特征提取,获得基模态、特征值和模态系数,以及数据的后处理。(Feature extraction of data snapshot, obtaining basic modes, eigenvalues and modal coefficients, and post-processing of data.)
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nterfacedesign
MATLAB界面设计篇,曲线转换按钮,栅格控制按钮,弹出式菜单,多选菜单等32个程序(MATLAB interface design articles, curve conversion button, the grid control buttons, pop-up menu, select the menu more than 32 programs, etc.)
- 2010-11-14 11:47:30下载
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Second_order_plus_zero
应用最小二乘法对二阶加零点系统进行辨识,得到相关参数(Least square method a second order zero system identification, are relevant parameters)
- 2010-05-12 04:53:13下载
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PatternRecognitionTask
这是一个用liblinear进行分类的例子,需要有liblinear环境(Using liblinear to do classification task)
- 2014-01-14 14:08:33下载
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si
系统辨识作业,仿真比较OE模型 ARMAX模型 和ARX模型的便是效果,内涵ppt。(System identification operation, the simulation model compared OE and ARX model ARMAX model is the effect, meaning ppt.)
- 2020-11-23 23:39:33下载
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shanghanshu
信息论课程里面,信息熵,平均互信息的编码的Matlab源码(Inside information theory courses, information entropy, average mutual information Matlab source code)
- 2010-11-29 22:52:08下载
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Convex-Optimization
凸优化理论在信号处理当中的应用,通信、信号处理类专业应用书籍(convex optimization in signal processing)
- 2015-02-24 16:33:27下载
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unit commitment and ELD by dynamic programming
Unit commitment and economic load dispatch by dynamic programming
- 2019-05-08 19:56:05下载
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