Description: 用matlab来实现fir滤波器，包括矩形窗、汉宁窗、汉明窗、等波纹法！-Using matlab to achieve the fir filter, including the rectangular window, Hanning window, Hamming window, such as corrugated Act! Platform: |
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Author:王娟芳 |
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Description: 本次课程设计是用麦克风采集一段语音信号并对该语音信号进行滤波去噪处理。课程设计平台为MATLAB7.1。设计步骤为：首先采集一段语音信号并观察其频谱，然后设计一个汉明窗FIR滤波器，最后对该信号进行滤波。信号在进行滤波处理后，能够听到滤波后的语音信号和滤波前相比明显的变得清晰，基本达到了设计目的。-The curriculum design is a section of a microphone speech signal acquisition and filtering of the speech signal de-noising processing. Curriculum design platform MATLAB7.1. Design steps: First, a section of speech signal acquisition and to observe its spectrum, and then the design of a Hamming window FIR filter, the final filtering of the signal. Signal during the filtering processing, to hear the voice signal after filtering and filtering obvious ago became clear, the basic design to achieve the purpose. Platform: |
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Author:球球 |
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Description: The Window Design Method
The basic idea behind the design of linear-phase FIR filters using the window
method is to choose a proper ideal frequency-selective filter [which always has
a noncausal, infinite duration impulse response] and then truncate its impulse
response hd[n] to obtain a linear-phase and causal FIR filter h[n]. To truncate the
impulse response of the ideal filter a time window w[n] is used. Available windows
in Matlab are rectangular [or boxcar in Matlab], bartlett, hamming, hanning Platform: |
Size: 877568 |
Author:Rizwan |
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Description: 四种窗函数设计FIR数字滤波器matlab源码（hant,hamming,blackman,kaiser)-use window functions to design digital low-pass FIR filter... Platform: |
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Author:Jie Yao |
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Description: 此程序是基于MATLAB的采用窗函数设计法设计FIR滤波器，内有多种窗函数，包括海明窗，汉宁窗，布拉克曼窗-This procedure is based on the use of MATLAB window function design FIR filter design with a multi-window function, including the Hamming window, Hanning window, Blackman window, etc. Platform: |
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Author:江晓磊 |
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Description: 用窗函数法设计一个长度N等于8的线性相位FIR滤波器。其理想的幅频特性为
分别用矩形窗、Hanning窗、Hamming窗、Blackman窗、Kaiser窗(ｂ=8.5)设计该滤波器。
-Window function method used to design a length N equal to 8 the linear phase FIR filter. Its ideal amplitude-frequency characteristics of rectangular windows, respectively, Hanning window, Hamming window, Blackman window, Kaiser window (b = 8.5) the design of the filter. Platform: |
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Author:zhangfei |
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Description: 用各种窗函数设计FIR数字滤波器。
分别用矩形窗和Hamming窗设计线性相位FIR低通滤波器。要求通带截止频率，单位脉冲响应h(n)的长度N=21，绘出h(n)及其幅频响应特性曲线。
-Window function with a variety of FIR digital filter design. Were rectangular window and Hamming window design of linear phase FIR low-pass filter. Requirements of passband cutoff frequency, unit impulse response h (n) of length N = 21, draw h (n) and its amplitude-frequency response curve. Platform: |
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Author:刘卫菠 |
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Description: 用窗函数法hamming设计的FIR数字低通滤波器，能够实现心电信号中随机噪声的去除-Hamming window function method with the design of FIR digital low-pass filter, ECG can be achieved in the removal of random noise Platform: |
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Author:li ting |
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Description: 用窗函数法设计FIR数字滤波器，能熟悉矩形窗、海宁窗、汉明窗和布莱克曼窗。掌握用上述窗函数法设计FIR数字滤波器的原理和方法。熟悉线性相位FIR数字滤波器特性。了解各种窗函数对滤波特性的影响。
-FIR window design with a digital filter function can be familiar with the rectangular window, Haining window, Hamming window and Blackman window. Master window function with the FIR digital filter design theory and methods. Familiar with linear phase FIR digital filter characteristics. Learn a variety of window function on the filter characteristics. Platform: |
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Author:hzz |
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Description: 用MATLAB函数fir1设计一个具有如下指标的线性相位FIR带通滤波器：阻带截止频率为0.55pi 和0.85pi，通带截止频率为0.65pi和 0.75pi，最大通带衰减为0.2dB，最小阻带衰减为42dB。分别利用下面的窗函数来设计滤波器：汉宁窗、汉明窗、布莱克曼窗。对于每种情况，给出其冲激响应系数并画出设计的滤波器的幅频响应。-Designed with a MATLAB function with the following indicators fir1 linear phase FIR band-pass filter: stopband cutoff frequency for the 0.55pi and 0.85pi, passband cutoff frequency of 0.65pi and 0.75pi, maximum passband attenuation is 0.2dB, minimum stopband attenuation of 42dB. Window functions were used to design the following filter: Hanning, Hamming window, Blackman window. For each case, given its impulse response filter coefficients and draw the design magnitude response. Platform: |
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Author:董晓曦 |
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Description: In this laboratory, we mainly focus on how to design the FIR filters using MATLAB and under certain specifications.
Also, we need to:
Design FIR filters using windows (rectangular and Hamming) to meet certain specifications
Evaluate the designed filters to see their characteristic
Realize the designed filters using some input signal sequences
Basically, we are required to get more knowledge which is about the FIR design, such as what rectangular and hamming windows are. How to obtain the most satisfactory FIR filter by adjusting the corresponding data are also important in this laboratory section.
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Author:RAVE YUEN |
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Description: The following Matlab project contains the source code and Matlab examples used for 2 d fir filter design. 2-D zero phase digital FIR filter using Hamming Window
The source code and files included in this project are listed in the project files section, please make sure whether the listed source code meet your needs there.
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Author:Virtyt |
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Description: 以MATLAB软件为工具，在GUI图形用户界面下针对不同特点的语音信号进行八种不同模式的滤波处理的语音信号处理系统，涉及基于巴特沃思滤波器的IIR滤波器和汉明窗设计的FIR滤波器，能够实现语音文件的打开及自定义路径的存储功能，同时可以实现语音信号加噪和音频倒放功能。-The source code, by means of MATLAB, under the Graphical User Interface, achieves a kind of speech signal processing system with eight different modes of speech signal filters working according to different characteristics of speech signal. The system involves IIR filter based on Butterworth analog filter and FIR filter based on Hamming Window, is able to open and save audio files in the user-defined place and realizes functions of noise addition and audio back-play. Platform: |
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Author:李小 |
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Description: 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.) Platform: |
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Author:花祭嘉音
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Description: 使用海明窗设计带阻FIR滤波器，性能指标为：阻带边界频率 ，低通边界频率 ，高通边界频率 ，通带纹波 ，阻带纹波 ，描述设计过程，并绘制其频率特性图。(The band stop FIR filter is designed by Hamming window. The performance indexes are: stop band boundary frequency, low pass boundary frequency, high pass boundary frequency, pass band ripple, stop band ripple, describe the design process, and plot its frequency characteristic diagram.) Platform: |
Size: 113664 |
Author:leestar
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