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FIR
1、验证窗函数 N 变化时,验证其频谱主瓣副瓣比、主瓣宽度的变化。
a)矩形窗函数的 N 变化时,验证其其频谱主瓣副瓣幅度比基本不会发生变化,
而主瓣宽度将会变窄。这说明,当用矩形窗函数设计滤波器时,增大 N 不能使
得阻带衰减减小,但能够减小过渡带。
b)再选取其他的窗如 hamming/hanning 窗,验证当 N 变化时,其频谱主瓣宽
度变化、主瓣副瓣比值变化情况。
2、用窗函数法设计线性相位 FIR 低通,通带截止频率 wp=0.5PI, 阻带截止频率 ws=0.6PI,
阻带衰减不小于 40dB,通带衰减不大于 3dB.
a)选取 Hanning,Hamming 窗查看设计出来的 FIR 的过渡带宽和阻带衰减是否
满足要求,二者有什么不同。
b)使用 hamming 窗,将窗长增大 1 倍,设计 FIR。验证同样的窗函数类型
(hamming),不同窗长度时,设计出来的 FIR 的过渡带宽和阻带衰减都有什么变
化。
3、不使用 Matlab 系统函数得到上一项指标的低通,并与上一项结果比较。
4 用窗函数法设计线性相位 FIR 高通,通带截止频率 wp=0.8PI, 阻带截止频率
ws=0.7PI, 阻带衰减不小于 30dB,通带衰减不大于 3dB.(An actual filter is implemented using the truncated unit impulse response sequence of the ideal filter.
For the ideal low pass filter, the unit impulse response h, N, D () is intercepted by a length of N, and the length is
The N sequence H (n), when intercepted, guarantees causality and linear phase requirements for the filter.
In order to reduce the Gibbs effect, the H (n) window is added, and the appropriate window function is selected to ensure the stopband attenuation and
Transition zone requirement. Note that the sidelobe of the window function affects the stopband attenuation of the filter, and the main lobe width affects the filter
Transition bandwidth.)
- 2017-07-06 11:55:24下载
- 积分:1
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per
function Px = per(x,n1,n2)
PER Estimate the spectrum of a process using the periodogram
-----------
USAGE Px = per(x,n1,n2)
The spectrum of a process x is estimated using the periodogram.
x : input sequence
n1 : starting index, x(n1)
n2 : ending index, x(n2)
The periodogram is returned in Px using a linear scale.
If n1 and n2 are not specified the periodogram of the entire
sequence is computed.
- 2012-04-18 09:56:59下载
- 积分:1
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OFDMsimulinkprogramme
说明: 这是ofdm的原始仿真代码,是应用matlab环境下的程序。(This is the original OFDM simulation code is the use of Matlab environment procedures.)
- 2006-05-10 21:11:11下载
- 积分:1
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music
用MATLAB仿真谱估计中的MUSIC算法(MATLAB simulation spectrum estimation using the MUSIC algorithm)
- 2011-06-25 13:09:10下载
- 积分:1
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PMSMzuihou
采用mathcad编程实现的永磁同步电机设计的程序,利用mathcad计算得到的数据导入Ansoft中,利用有限元可以验证解析法实现的电机设计的正确性与有效性。(Mathcad programming using a permanent magnet synchronous motor design programs, data import use mathcad calculated Ansoft, the use of finite element can verify the correctness and validity of the analytical method to achieve the motor design.)
- 2014-11-02 09:45:20下载
- 积分:1
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workspaceP(2)
用MATLAB语言将3-PSS并联机器人的工作空间表示出来 利用数值搜索法(MATLAB 3-PSS ROBOT workspace)
- 2021-02-21 15:49:42下载
- 积分:1
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PAPR
抑制OFDM系统PAPR的PTS算法改进(PAPR of the PTS suppression algorithm for OFDM system, improvement of)
- 2010-01-03 13:11:11下载
- 积分:1
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shuoming
matlab/simulinkSfunctionCmatlab/simulinkSfunctionC文件例子源码文件例子源码(matlab/simulinkSfunctionCmatlab/simulinkSfunctionC paper documents examples of source code examples)
- 2009-07-09 22:42:48下载
- 积分:1
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exm
Experiments with MATLAB这本书所附的源代码。用MATLAB进行仿真实验。(Experiments with MATLAB)
- 2011-05-03 12:23:00下载
- 积分:1
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bmid_pkg
采用二阶盲源分离程序编写的模态参数识别Matlab工具箱。(Toolbox for performing modal dentification using second order blind source separation methods)
- 2011-09-29 23:33:54下载
- 积分:1