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先采集一单声道音频信号(.wav)并用WAVREAD文件采样读取,并对其进行频谱分析。分别用窗函数法和双线性变换法设计低通、高通、带通三种FIR滤波器和IIR滤波器。用M文件使信号通过滤波器并对输出信号进行时域和频域分析。-First acquisition of a mono audio signal (. Wav) files with sampling WAVREAD read, and their spectral analysis. Window function, respectiv
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按照给定指标采用模拟巴特沃斯低通滤波器去逼近理想模拟低通滤波器 ,然后通过双线性变换法对模拟滤波器进行数字化,得到数字滤波器 -Indicators in accordance with a given analog Butterworth low-pass filter to approximate the ideal analog low-pass filter, and then through the bilinear transformation method of digitizin
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ex4_2 用MATLAB作巴特沃斯低通滤波器设计
ex4_3 用MATLAB作切比雪夫-1型低通滤波器设计
ex4_4 切比雪夫-2型低通滤波器设计
ex4_5 椭圆型低通滤波器设计
ex4_6 传递函数的模拟滤波器数字化
ex4_7 脉冲不变法简单实例
ex4_8 脉冲不变法巴特沃思低通滤波器设计
-ex4_2 using MATLAB for Butterworth low-pass filter design using MATLAB for ex4_3 Ch
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基于冲激响应不变法的IIR数字滤波器设计,冲激响应不变法的设计原理是利用数字滤波器的单位抽样响应序列H(z)来逼近模拟滤波器的冲激响应g(t)。
按照冲激响应不变法的原理,通过模拟滤波器的系统传递函数G(s),可以直接求得数字滤波器的系统函数H(z),其转换步骤如下:
1) 利用ω=ΩT(可由关系式 推导出),将 , 转换成 ,Ω,而 , 不变;
2) 求解低通模拟滤波器的传递函数G(s);
3) 将模拟滤波器的传递函数G(s)转换为数字滤波器的传递函数H(z)。
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Matlab code for ideal low pass filters used in communication systems.
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M-file models a QPSK RXTX at passband using a correlation receiver and low pass filters. This m-file is a revision of QPSK TXRX SYSTEM ANALYSIS published earlier.
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designing of low pass, highpass, bandpass,bandstop filters
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(原创)包括冲激响应不变法设计ButterWorth数字低通滤波器、双线性变换法设计ButterWorth数字低通滤波器、和双线性变换法设计ChebyshevI型数字低通滤波器-(Original) includes the same impulse response ButterWorth Design of digital low-pass filters, bilinear transform design ButterWorth digital low-pass filter, and
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MATLAB医学影像处理实验(内含14个原代码及教学的说明)
(1)Plot a sine function using MATLAB, and write the data into a file
(2)Read data from a file, plot a SINC function, and append the result back to the same file
(3)Plot a Gaussian distribution using MATLAB
(4)Fo
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本实验首先按照给定技术指标采用模拟低通滤波器(巴特沃思低通滤波器)去逼近理想模拟低通滤波器,然后通过双线性变换法对模拟滤波器进行数字化,得到数字滤波器。-In this study, first of all technical specifications in accordance with a given analog low-pass filter (Butterworth low-pass filter) to approximate the ideal analog low-pass
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设计一个IIR数字低通滤波器, 逼近一组模拟滤波器的指标参数(通带截止频率Wp=2*pi*2000rad/s,阻带边界频率Ws=2*pi*3000rad/s,通带波纹 Rp=3db, 阻带衰减Rs=15db, 采样频率f=10000Hz); 分别用脉冲响应不变法和双线性变换法实现设计,列出传递函数并描绘模拟和数字滤波器的幅频和相频响应曲线。用上述设计滤波器完成几组给定信号的滤波,证明滤波器的有效性和滤波范围限制.-Design a IIR digital low-pass filter, app
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设计巴特沃斯低通和高通IIR数字滤波器,得到二阶频率级联参数-Design of Butterworth low-pass and high-pass IIR digital filters, to be cascaded second-order frequency parameter
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FIR滤波器:自定滤波器的类型(低通,高通或带通)、设计指标(通带截止频率、通带波纹、阻带截止频率、阻带衰减)
1、根据指标选择合适的窗函数,用窗口设计法设计符合指标的FIR滤波器;并验证其性能是否满足预定指标。
-FIR filters: Custom filter types (low pass, high pass or band-pass), design specifications (passband cutoff frequency, passband ripple, st
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利用低通滤波器对图像进行插值放大:按放大的倍数对原图像进行插零,插零后的图片与低通滤波函数进行卷积,原先插入的零的位置自动替换为适当的插值,如此图像就已经插值放大了,图像质量还不错。-Double the number of pixels of each row and column by adding a zero value pixel between each pixel of the image.Then operate with two kinds of low-pass filter
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三维数字滤波器中的理想低通滤波器的matlab仿真及其结果-3 d digital filters in an ideal low-pass filter matlab simulation and the result
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It is the matlab code for low pass filters
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MATLAB ideal low pass filter:
MATLAB Butterworth low pass filter:
Gaussian low pass filters
Gaussian high pass filters
Ideal high pass filters
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产生线性调频信号,可以是宽带,也可以是窄带信号。还有低通滤波器(A linear frequency modulated signal can be produced ,wideband or narrowband. There are also low-pass filters)
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matlab编程利用三种低通滤波器对图像的滤波(uses three low pass filters to filter the image)
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ANALOG HIGH PASS AND LOW PASS FILTERS
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