Description: 数字带通滤波器的设计过程。共3个源程序。其中，dos.cpp为带通FIR的源程序，其中的滤波器阶数n，滤波器的低频fln，滤波器的高频fhn，窗函数w，可以按照自己的要求改变。这里采用的是汉宁窗。主函数main.cpp实现输入与fir的h(n)的卷积，输出结果Y(n)，并将其存储在y.txt中。最后，graphics.cpp从y.txt读取数据，再由语句画出波形，可以清楚地看出计算结果是否正确，并进行比较。-digital band-pass filter design process. A total of three sources. Among them, dos.cpp FIR bandpass to the source, the filter order n, the low-frequency filter FLN, the high-frequency filter fhn, window function w, in accordance with the requirements change. Here is the Hanning window. The main function main.cpp achieve the input and fir h (n) convolution, the output Y (n), and store them in y.txt China. Finally, graphics.cpp y.txt read data from and then draw waveform statement, we can clearly see whether calculations are correct, and comparisons. Platform: |
Size: 2048 |
Author:feide |
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Description: 针对基于DSP的使用C++编译的数字信号的高低频滤波的编程源代码-DSP based on the use of C++ Compile digital signal high-low-frequency filter programming source code Platform: |
Size: 13312 |
Author:孙明杰 |
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Description: 1．产生一个连续信号，包含低频，中频，高频分量，对其进行采样，进行频谱分析，分别设计三种高通，
低通，带通滤波器对信号进行滤波处理，观察滤波后信号的频谱。
2.采集一段含有噪音的语音信号（可以录制含有噪音的信号，或者录制语音后再加进噪音信号），对其进行
采样和频谱分析，根据分析结果设计出一合适的滤波器滤除噪音信号-1. Produce a continuous signal, including low-frequency, medium frequency, high-frequency components, its sampling, spectral analysis, are designed for three high-pass, low pass, band-pass filter the signal filtering treatment to observe the signal spectrum after filtering. 2. Acquisition section of the speech signal contains noise (can record a signal containing noise, or voice recording, additional noise after the signal), its sampling and spectral analysis, based on an analysis of the results to design a suitable filter to filter out one noise signal Platform: |
Size: 1024 |
Author: |
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Description: 高斯平滑是去除图像噪声的一种方法，用低频滤波器处理，低通滤波器的作用就是滤掉高频分量，从而达到减少图象噪声的目的，高斯平滑指的是滤波用的模版是高斯（guass）模版，通过采样2维高斯函数得到。-Gaussian smoothing is to remove the image noise is a means to deal with low-frequency filter, low pass filter function is to filter out high frequency components, so as to achieve the purpose of reducing the image noise, Gaussian smoothing refers to the filter used template is a Gaussian (guass) template by sampling 2-dimensional Gaussian function to be. Platform: |
Size: 50176 |
Author:yue |
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Description: ％ y=filter(sig,fmin,fmax)
％ 对信号进行理想滤波，可完成低通，带通
％ sig为被滤波信号
％ fmin为下限频率，当fmin为0时为低通滤波器，当fmin>0时，为带通滤波器
％ fmax为上限频率，fmax>fmin
％ fs为信号的采样频率
％ y为经过滤波后的信号
-％ Y = filter (sig, fmin, fmax)％ of the ideal signal filtering, to be completed by low-pass, band-pass filter％ sig for signal％ fmin is the minimum frequency, when fmin for 0:00 for the low-pass filter, when fmin > 0, for the bandpass filter％ fmax is the upper limit frequency, fmax> fmin％ fs for signal sampling frequency％ y for the filtered signal Platform: |
Size: 1024 |
Author:liu |
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Description: 设计一个低通滤波系统，任意输入三个频率使输入的信号中留下频率最低的
一个分量。-Designed a low-pass filter system, indiscriminate importation of the three input signal frequency so that left one of the lowest frequency component. Platform: |
Size: 1024 |
Author:沙磊 |
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Description: 1）设计Butterworth型音频抗混叠滤波器；
2）参数：
下通带频率300Hz；上通带频率3400Hz；
下阻带频率280Hz；上阻带频率3600Hz；
通带最大衰减0.3dB；
阻带最小衰减40dB；
3）采用一低通滤波器和一高通滤波器级联；
4）分别确定LPF和HPF的性能指标；
5）求出两滤波器的系统函数和频率响应，并画出其幅频特性曲线；
6）求整个滤波器的系统函数和频率响应，并画出其幅频特性曲线。-1) the design of Butterworth-type audio anti-aliasing filter 2) parameters: passband frequency of 300Hz on pass-band frequency 3400Hz under the stop-band frequency of 280Hz on stop-band frequency 3600Hz passband maximum attenuation of 0.3dB minimum stopband attenuation of 40dB 3) the use of a low-pass filter and a high-pass filter cascade 4) separately to determine the performance of LPF and HPF target 5) to derive two-filter system function and frequency response, and draw its increase frequency characteristic curve 6) for the entire filter system function and frequency response, and draw its amplitude-frequency characteristic curve. Platform: |
Size: 15360 |
Author:hsf |
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Description: Useing the MATLAB command remez to obtain a low pass filter z(n) with a cutof frequency
of 40 Hz at a sample rate of 1000 Hz. Platform: |
Size: 1024 |
Author:shrok |
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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: |
Size: 3072 |
Author:刘卫菠 |
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Description: We have to design a second order Butterworth filter having a sampling frequency of 20 kHz and -3db cut of frequency at 2 kHz in visual C. Only low frequency signals can pass through this filter and the signals having the frequency higher than frequency called cut off frequency get attenuated by this filter. we will use bilinear transform which is one of the most efficient way of converting a analogue filter to digital filter, we will convert the given transfer function from Laplace transform to z-transform and then we will realize poles and zeroes in the z-domain. And their corresponding frequency response.-We have to design a second order Butterworth filter having a sampling frequency of 20 kHz and-3db cut of frequency at 2 kHz in visual C. Only low frequency signals can pass through this filter and the signals having the frequency higher than frequency called cut off frequency get attenuated by this filter. we will use bilinear transform which is one of the most efficient way of converting a analogue filter to digital filter, we will convert the given transfer function from Laplace transform to z-transform and then we will realize poles and zeroes in the z-domain. And their corresponding frequency response. Platform: |
Size: 447488 |
Author:Mak_m |
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Description: 一个无源二阶低通滤波器，改变电阻与电容值可以改变截止频率，已试过，好用。-A passive second-order low-pass filter and change the resistance and capacitance values can change the cut-off frequency has been tried, easy to use. Platform: |
Size: 2348032 |
Author:baby |
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Description: 先由原始图像（任选）产生待恢复的图像； 利用二维小波分析对一幅图象作2层小波分解,并在此基础上提取各层的低频信息实现图像的压缩。
分别用逆滤波和维纳滤波恢复上面图像。
-First be the original image (optional) to restore the image to be generated the use of two-dimensional wavelet analysis of an image for two-layer wavelet decomposition, and on this basis, the low-frequency information extracted layers for image compression. Were used to inverse filtering and Wiener filter to restore the image above. Platform: |
Size: 1024 |
Author:tony |
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Description: 介绍了两种典型低通滤波电路及其频率特性, 结合它们的低通原型电路及其参数计算公式, 对微波低通滤波器的设计方法进行了详细介绍,并通过设计实例说明了这种通用设计方法在电路设计中的应用。-The article in brief introduces the circuits and frequency characteristic of two kinds of typical low-pass filter and then,combined with the circuits and their parameter calculation formula, discusses a method of designing microwave low-pass filter in detail. Finally through an example the paper explains the design method in circuit application. Platform: |
Size: 76800 |
Author:小甜瓜 |
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Description: 设计产生一个连续信号，包含低频，中频，高频分量，对其进行采样，进行频谱分析，使用矩形窗设计不同特性的数字滤波器对信号进行滤波处理，分析所设计滤波器(画出了频率特性曲线)，并对信号进行滤波，画出滤波后信号的时域波形和频谱，并对滤波前后的信号进行对比，同时设计出了一个友好的人机交互界面。-Designed to produce a continuous signal, including low frequency, medium frequency, high frequency components, its sampling, spectral analysis, using rectangular windows of different characteristics of digital filter design the signal filtering, analysis of the designed filter (to draw the frequency characteristic curve), and signal filtering, to draw the filtered signal in time domain waveforms and frequency spectrum, and filtering the signal before and after comparison, the mean time, a friendly interactive interface. Platform: |
Size: 76800 |
Author:楚乐 |
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Search - low frequency filter