Location:
Search - freqz
Search list
Description: ASP高级网 t=0:0.0000002:0.0006 ％ ts=0.2ms 每周期1000点
x1=sin(5000*2*pi.*t) ％ 生成5KHz的正弦波
b=fir1(9,0.01,hanning(10)) ％ 采样频率是100KHz，截止频率为500Hz的9阶汉宁窗生成b系数。
freqz(b,1,512,100000)
y=filter(b,1,x1) ％ 对5KHz正弦波用9阶汉宁窗进行滤波
plot(t,x1,t,y)
仿真结果未见到y被衰减的滤波效果。请高手指点。 络变成编程-ASP t = 0:0.0000002 : ts = 0.0006% per period 1000 EMFs point x1 = sin (5000 * 2 * pi. * t)% 5KHz generation of sine wave b = fir1 (9,0.01. HANNING (10))% is 100KHz sampling frequency, As the frequency of 500Hz nine bands Hanning window Generation b coefficient. Freqz (b, 1,512,100000) y = filter (b, a, x1)% to 5KHz sine wave with nine bands Hanning window filtering plot (t, x, t, y) Simulation results were not seen y attenuation of the filter effect. 19:56 guidance. Tongxinluo into programming
Platform: |
Size: 71520 |
Author: 罗飞腾 |
Hits:
Description: CIC滤波器matlab代码 D=5; r=D; fs=1e5; S3_cic=conv(conv(ones(1,D),ones(1,D)),ones(1,D)); %三个单级卷积 [h3,f3]=freqz(S3_cic,1,1000,fs); plot(f3/(fs/2),20*log10(abs(h3))-max(20*log10(abs(h3))),'r','LineWidth',1.4) ylabel('\fontsize{12}\bf幅度响应（dB）') xlabel('\fontsize{12}\bf归一化频率(\times\pi rad/sample)') grid; box on; axis([0 1 -80, 0])
Platform: |
Size: 680 |
Author: 530228758@qq.com |
Hits:
Description: ASP高级网 t=0:0.0000002:0.0006 ％ ts=0.2ms 每周期1000点
x1=sin(5000*2*pi.*t) ％ 生成5KHz的正弦波
b=fir1(9,0.01,hanning(10)) ％ 采样频率是100KHz，截止频率为500Hz的9阶汉宁窗生成b系数。
freqz(b,1,512,100000)
y=filter(b,1,x1) ％ 对5KHz正弦波用9阶汉宁窗进行滤波
plot(t,x1,t,y)
仿真结果未见到y被衰减的滤波效果。请高手指点。 络变成编程-ASP t = 0:0.0000002 : ts = 0.0006% per period 1000 EMFs point x1 = sin (5000* 2* pi.* t)% 5KHz generation of sine wave b = fir1 (9,0.01. HANNING (10))% is 100KHz sampling frequency, As the frequency of 500Hz nine bands Hanning window Generation b coefficient. Freqz (b, 1,512,100000) y = filter (b, a, x1)% to 5KHz sine wave with nine bands Hanning window filtering plot (t, x, t, y) Simulation results were not seen y attenuation of the filter effect. 19:56 guidance. Tongxinluo into programming
Platform: |
Size: 71680 |
Author: 罗飞腾 |
Hits:
Description: 求取系统的绝对幅度响应、相对的db值幅度响应、相位响应和群延时响应的函数
％
％db为相对振幅(dB)
％mag为绝对振幅
％pha为相位响应
％grd为群延时
％w为频率样本点向量
％b为Ha(z)分子多项式系数(对FIR而言，b=h)
％a为Hz(z)分母多项式系数(对FIR而言，a=1)
％-strike rate system in response to the absolute and relative value range db response phase and group delay response to the response function%% db relative amplitude (dB)% mag as the absolute amplitude% of MTS Phase Response% for the group delay grd% w frequency of sample points for the vector b Ha% (z) elements polynomial coefficient (F IR, b = h)% for a Hz (z) denominator polynomial coefficient (right FIR, a = 1)%
Platform: |
Size: 1024 |
Author: 吴江华 |
Hits:
Description: ex1_1 单位冲激序列
ex1_2 右移20的单位冲激序列
ex1_3 单位阶跃序列
ex1_4 实指数序列
ex1_5 复指数序列
ex1_6 随机序列
ex1_7 系统冲激响应（impz函数）
ex1_8 系统传递函数（freqz函数）
ex1_9 零极点增益
ex1_10 residuez函数应用
ex1_11 Lattice结构全极点IIR系统
ex1_12 Lattice结构全零点FIR系统
ex1_13 Lattice结构零极点结构-unit impulse sequence ex1_1 shifted to right ex1_2 unit 20 unit step impulse ex1_3 sequence sequence sequence ex1_4 index is ex1_5 complex exponential sequence ex1_7 random sequence ex1_6 system impulse response (impz function) ex1_8 system transfer function (freqz function) ex1_9 zeros and poles gain function ex1_10 residuez application ex1_11 Lattice all-pole IIR system structure ex1_12 Lattice structure of the whole system against ex1_13 Lattice Structure of FIR zero-pole structure
Platform: |
Size: 2048 |
Author: 张满超 |
Hits:
Description: freqz对一个采样频率为45.5MHz的信号进行14倍的抽取滤波，同时进行补偿滤波器的设计，并给出CIC滤波器、补偿滤波器和级联后的频谱图 - for the droop in the passband for the CIC decimator.Design a minimum-order CIC compensator that compensates...
.
Platform: |
Size: 1024 |
Author: 钟广明 |
Hits:
Description: ex1_1 单位冲激序列
ex1_2 右移20的单位冲激序列
ex1_3 单位阶跃序列
ex1_4 实指数序列
ex1_5 复指数序列
ex1_6 随机序列
ex1_7 系统冲激响应（impz函数）
ex1_8 系统传递函数（freqz函数）
ex1_9 零极点增益
ex1_10 residuez函数应用
ex1_11 Lattice结构全极点IIR系统
ex1_12 Lattice结构全零点FIR系统
ex1_13 Lattice结构零极点结构
-ex1_1 单位冲激序列
ex1_2 右移20的单位冲激序列
ex1_3 单位阶跃序列
ex1_4 实指数序列
ex1_5 复指数序列
ex1_6 随机序列
ex1_7 系统冲激响应（impz函数）
ex1_8 系统传递函数（freqz函数）
ex1_9 零极点增益
ex1_10 residuez函数应用
ex1_11 Lattice结构全极点IIR系统
ex1_12 Lattice结构全零点FIR系统
ex1_13 Lattice结构零极点结构
Platform: |
Size: 2048 |
Author: 曹宁 |
Hits:
Description: 根据语音信号的特点给出有关滤波器的性能指标：1）低通滤波器性能指标，fp=1000Hz，fc=1200 Hz， As=100dB，Ap=1dB；2）高通滤波器性能指标，fc=2800 Hz，fp=3000 Hz As=100dB，Ap=1dB；3）带通滤波器性能指标，fp1=1200 Hz，fp2=3000 Hz，fc1=1000 Hz，fc2=3200 Hz，As=100dB，Ap=1dB。用IIR对其分析，最后，利用MATLAB中的函数freqz画出各滤波器的频率响应。-This article according to the IIR filter and the FIR filter characteristic, uses the bilinearity method of transformation under the MATLAB bad boundary to design IIR and to design the FIR numeral filter separately with the window box number, and carries on the analysis to the gathering pronunciation signal, and finally gives IIR and FIR to the pronunciation filter effect.
Platform: |
Size: 3072 |
Author: |
Hits:
Description: 根据语音信号的特点给出有关滤波器的性能指标：1）低通滤波器性能指标，fp=1000Hz，fc=1200 Hz， As=100dB，Ap=1dB；2）高通滤波器性能指标，fc=2800 Hz，fp=3000 Hz As=100dB，Ap=1dB；3）带通滤波器性能指标，fp1=1200 Hz，fp2=3000 Hz，fc1=1000 Hz，fc2=3200 Hz，As=100dB，Ap=1dB。用IIR对其分析，最后，利用MATLAB中的函数freqz画出各滤波器的频率响应。-This article according to the IIR filter and the FIR filter characteristic, uses the bilinearity method of transformation under the MATLAB bad boundary to design IIR and to design the FIR numeral filter separately with the window box number, and carries on the analysis to the gathering pronunciation signal, and finally gives IIR and FIR to the pronunciation filter effect.
Platform: |
Size: 3072 |
Author: |
Hits:
Description: 幅频响应特性图[h1,w]=freqz(b1,1,N,1)
[h2,w]=freqz(b2,1,N,1) -Amplitude frequency response characteristics of Figure
Platform: |
Size: 28672 |
Author: 汪月霞 |
Hits:
Description: 对于信号 ，其中w(n)为均值为0，方差为1的AWGN。n=1,2,…，128。
AR模型功率谱估计。假设AR（4），用LS方法估计AR参数，功率谱用freqz（1，LS_ar,1024,1）来验证。-For the signal, which w (n) is zero mean and variance 1 AWGN. n = 1,2, ..., 128.
AR model power spectrum estimation. Assuming AR (4), with the LS method to estimate AR parameters, power spectrum with freqz (1, LS_ar, 1024,1) to verify.
Platform: |
Size: 1024 |
Author: jiajia |
Hits:
Description: 主要指令：butter（产生巴特沃斯滤波器）；freqz（绘制幅频、相频曲线）；zplane（绘制零、极点图）；ss2zp（状态方程变零、极点）；zp2tf（零、极点变分式多项式）。-Main instruction: butter (produced bart wo filter) Freqz (draw amplitude frequency, phase frequency curve) Zplane (draw zero, poles chart) Ss2zp (state equation is zero, poles) Zp2tf (zero, pole change fraction polynomial).
Platform: |
Size: 3072 |
Author: 邢楠 |
Hits:
Description: 本工程实现了将三路合成的DSB信号用椭圆滤波器（低通，带通，高通）滤出；
其中的freqz函数，filter函数，fft函数都自己实现。
每种滤波器都分别用专门的函数分别写出，可以模块化。-
This project will be three-way synthetic a DSB signal elliptic filter (low pass, band-pass, high pass) filter out
Freqz function of which, the filter function, fft function.
Each filter are, respectively, with a special function, respectively, to write, can be modular.
Platform: |
Size: 117760 |
Author: zhengzai |
Hits:
Description: 求两个传输函数的频率响应，利用freqz函数实现-The sum of two transfer functions of the frequency response, using freqz function implementation
Platform: |
Size: 1024 |
Author: 符玉云 |
Hits:
Description: M=63 J=(M-1)/2 Wp=0.5*pi Ws=0.6*pi
Np=100 Ns=100
weightp=1 weights=100 通带和阻带的加权系数
WpN=linspace(0,Wp,Np)
WsN=linspace(Ws,pi-0.05,Ns)
Wm=[WpN WsN]
p=[ones(1,50),ones(1,50)/2]
d=[p,zeros(1,Ns)]
W=diag([weightp*ones(1,Np),weights*ones(1,Ns)])
C=cos(Wm*[0:J])
Q=diag(cos(Wm*0.5))
g=(W*Q*C)\(W*d) g=g
h=(g(J:-1:2)+g(J+1:-1:3))/4
h=[g(J+1)/4 h g(1)*0.5+g(2)/4]
h=[h fliplr(h)] W=linspace(0,pi-0.1,512)
H=freqz(h,1,W)
plot(W/pi,20*log10(abs(H)))
-filter design
Platform: |
Size: 1024 |
Author: 李天 |
Hits:
Description: ex1_1 单位冲激序列
ex1_2 右移20的单位冲激序列
ex1_3 单位阶跃序列
ex1_4 实指数序列
ex1_5 复指数序列
ex1_6 随机序列
ex1_7 系统冲激响应（impz函数）
ex1_8 系统传递函数（freqz函数）
ex1_9 零极点增益
ex1_10 residuez函数应用
ex1_11 Lattice结构全极点IIR系统
ex1_12 Lattice结构全零点FIR系统
ex1_13 Lattice结构零极点结构
-ex1_1 unit impulse sequence ex1_2 right 20 unit impulse sequence ex1_3 unit step sequence ex1_4 real exponential sequence ex1_5 complex exponential sequence ex1_6 random sequence ex1_7 system impulse response (impz function) ex1_8 system transfer function (freqz function) ex1_9 pole-zero Gain ex1_10 residuez function application ex1_11 Lattice structure all-pole IIR systems ex1_12 Lattice structure of all-zero FIR system ex1_13 Lattice structure of zero-pole structure
Platform: |
Size: 3072 |
Author: Bruce |
Hits:
Description: 驗證DTFT的Time Shift property-The verification of DTFT Time Shift property
Platform: |
Size: 2048 |
Author: 翁茂翔 |
Hits:
Description: 计算连续时间系统频率响应的函数，对matlab中自带的freqz函数进行了优化-Modified version of freqz subroutine
Platform: |
Size: 1024 |
Author: 张伟 |
Hits:
Description: 经由正、负离散时间傅立叶变换表达式是信号分析的一个关键部分。
X( ) （3.9） （3.10）
当 LTI 系统用于滤波的时候，作为冲激响应离散时间傅立叶的频 率响应，提供了 LTI 系统间接的描述。离散时间傅立叶变换 X（ ）是 w 的周期复值函数，周期总是 2π，并且基周期通常选在区间[-π，π] 上。对离散时间傅立叶变换 DTFT 来说有两个问题： 1. DTFT 的定义对无限长信号是有效的。 2. DTFT 是连续变量 w 的函数 在 MATLAB 中， 任何信号 （向量） 必须是有限长度的， 所以 DTFT 无法用 MATLAB 直接计算。当能从变换定义式推导出解析式并计算 它时， 可以用 MATLAB 计算。 第二个问题是频率抽样问题。 MATLAB 擅长在有线网络点上计算 DTFT，通常选足够多的频率以使绘出的图 平滑，逼近真实的 DTFT。3.计算DTFT需要两个函数，MATLAB的freqz函数计算无限长信号，dtft（h，H）函数计算有限长信号的DTFT。-Passive and negative discrete Fourier transform expressions are a key part of signal analysis.
X () (3.9) (3.10)
When the LTI system is used for filtering, the frequency response of the discrete time Fourier as an impulse response provides an indirect description of the LTI system. Discrete time Fourier transform X () is the periodic complex function of w, the period is always 2π, and the base period is usually selected in the interval [-π, π]. There are two problems with the discrete-time Fourier transform DTFT: 1. The definition of DTFT is valid for infinite length signals. 2. DTFT is a function of continuous variable w In MATLAB, any signal (vector) must be finite length, so DTFT can not be directly calculated using MATLAB. When you can derive the analytic the transformation definition and calculate it, you can use MATLAB to calculate. The second problem is frequency sampling. MATLAB is good at calculating DTFTs at wired network points and usually selecting enough frequen
Platform: |
Size: 13312 |
Author: 张丽丽 |
Hits: