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录制自己的一段语音,时间控制在15秒到30秒左右;利用wavread函数对自己的语音进行采样,记住采样频率。
(1)画出原始语音信号的时域波形,而后以1秒为间隔,求出每秒数据的功率谱。
(2)根据语音信号特点,分别设计FIR及IIR滤波器,分别画出滤波器幅频和相频特性曲线。用设计的滤波器对信号滤波,画出滤波后时域波形。用sound函数回放语音信号。
(3)求出特征频段语音信号随时间变化的曲线(每间隔0.05秒求一次功率谱)。
-Record your own voice for
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基于matlab实现的双线性变换法设计滤波器,对心电图滤波,得出幅频特性图-Matlab based on the realization of the bilinear transformation method designed filter, for filtering electrocardiogram obtained amplitude-frequency characteristic map
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观察高斯序列 的时域和幅频特性。
①固定p=8,q分别等于2、4、8,观察它们的时域和幅频特性,了解当q取不同值时,对信号序列的时域和幅频特性的影响
②固定q=8,p分别等于8、13、14,观察p变化对信号序列时域和幅频特性的影响,注意p等于多少时,会发生明显的泄露现象,混叠是否也随之出现?记录实验中观察到得现象,绘出相应的时域序列和幅频特性曲线-Observed Gaussian sequence in time domain and amplitude-frequency
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为了减少边缘检测中的噪声影响,设计了一种分数阶差分滤波器,给出了该滤波器的原理,分析了此类滤波器的幅频特性.-In order to reduce the effect of the noise in edge detection,a kind of fractional-order difference filters were designed,whose theory was worked out and amplitude-frequency characteristic were an
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绘制四种常用低通模拟滤波器(贝赛尔滤波器,巴特沃斯滤波器,切比雪夫滤波器及椭圆滤波器)幅频特性曲线-Draw four commonly used low-pass analog filter (Bessel filter, Butterworth filter, Chebyshev filter and elliptic filter) amplitude-frequency characteristic curve
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用Hanning窗设计线性相位滤波器,绘制幅频和相位特性曲线,并在改变N的值后观察N对滤波器特性的影响及其时域特点。-Hanning window with a linear phase filter design, drawing amplitude frequency and phase characteristic curve, and change the value of N, N were observed on the filter characteristics and time
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用MATLAB使信号x(t)产生函数,并显示信号的幅频特性曲线-Using MATLAB to signal x (t) generating function, and displays signal amplitude-frequency characteristic curve
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数字信号处理,给定一段序列,实现FFT算法,然后画出幅频特性曲线,能够实现颜色变化,加上或者去掉网格。-Digital signal processing, given a sequence, to achieve FFT algorithm, and then draw the amplitude-frequency characteristic curve, to achieve color change, plus or remove the grid.
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通信信号的调制信息包含在信号的瞬时幅度、相位、频率的变化之中,不同的信号其频谱也呈现不同的特征,通过提取瞬时幅度、相位、频率以及频谱的参数统计特征,可以识别不同的通信信号。通常是利用对瞬时幅度、瞬时相位,瞬时频率和信号功率谱进行某种变换而得到可以明显区分各种信号的特征参数。-Communication signal modulation information is contained in the signal instantaneous amplitude, phase, frequency
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设计一个切比雪夫滤波器,要求通带截止频率 ,通带最大衰减 ,阻带截止频率 ,阻带最小衰减 。要求绘出滤波器的幅频特性曲线。-Design a Chebyshev filter, the passband cutoff frequency required, the maximum passband attenuation, stopband cutoff frequency, stopband minimum attenuation. Requirements of the filter amp
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现代信号处理 一个序列为 ,使用FFT分析其频谱:
1) 使用不同宽度的矩形窗截短该序列为M点长度,取M分别为: a) M=20 b) M=40 c)M=160 ;观察不同长度的窗对谱分析结果的影响;
2)使用汉宁窗、哈明窗重做1)
3)对三种窗的结果进行理论分析及比较。并绘出相应的幅频特性曲线
-Modern signal processing a sequence, using FFT analysis of the spectrum: 1) the width of the
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针对实际工业生产中常见的多输入多输出时滞过程, 构造多变量Smith预估控制结构, 提出基于对象模
型伴随矩阵的解耦器设计方法. 通过对解耦后对象的幅频和相频特性分析, 获得对象的简化一阶数学模型. 根
据Smith预估控制结构闭环特征方程的特点, 利用Butterworth滤波器极点配置的原理, 对解耦后的多变量时滞过程
设计PI控制器. 结合实际过程中常见的不确定性, 分析了控制系统保证鲁棒稳定性的充要条件. 最后以实例验证了
本文所提方法的优越性.-The decoupli
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用Matlab的GUI界面设计滤波器人机界面,可选FIR、IIR等高通,低通,带通,带阻滤波器,手动设定好参数,可直观看到幅频特性曲线和相频特性曲线。-Using Matlab GUI interface design a filter interface, optional FIR, IIR high pass, low pass, band pass, band stop filter, the parameters are set manually, you can visually se
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产生信号,并显示信号的幅频特性曲线
xt=xtg产生一个长度为N,有加性高频噪声的单频调幅信号。能画出仿真图形-Generate signals and displays signal amplitude-frequency characteristic curve
xt = xtg produce a length N, a single frequency amplitude of the high frequency signal plus noise. Can
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基于自适应算法的系统模型识别,本程序中使用低通FIR滤波器模拟未知系统,可以变换未知系统。输出系统的幅频特性曲线-Recognition system based on adaptive algorithm model, using low pass FIR filter is simulated in this program the unknown system, can change the unknown system.Output system of amplitude frequen
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关于matlab中,线性与系统中的离散信号的离散系统的幅频特性和相频特性代码-About matlab, the amplitude-frequency characteristics of linear discrete signals and systems in discrete systems and phase-frequency characteristic code
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分类绘制PI、PD、PID的对数幅频特性曲线,并添加了背景表格图-Classification draw PI, PD, PID logarithmic amplitude-frequency characteristic curve, and adds background table Figure
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风电功率的傅里叶变换matlab程序,用于幅频特性和相频特性分析-Fourier transform matlab program of wind power,for analysis of amplitude-frequency characteristic and phase-frequency characteristic
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设计巴特沃斯滤波器,滤波器的幅频响应,绘出巴特沃斯模拟/数字滤波器的幅频特性曲线(Design Butterworth filter, amplitude frequency response of filter, draw amplitude frequency characteristic curve of Butterworth analog / digital filter)
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二自由度有阻尼的幅频特性曲线以及相频特性曲线(Amplitude frequency characteristic curve of two degrees of freedom)
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