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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 F
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A filter is a system which modifies some special frequencies reletive to the others. As a result i s applicable in some applications when it is necessary to have different gains & phase shifts at different frequencies to perform specific filtering ta
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矩形窗、汉宁窗、汉明窗、布莱克曼窗的时域波形、幅频特性的matlab实现。-Rectangular window, Hanning, Hamming window, Blackman window time-domain waveform, amplitude and frequency characteristics matlab.
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基于matlab的高通滤波器设计,选用汉宁窗-the low-pass filter design based on Matlab with the window of hanning
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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,
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1)A function which is used to break the input signal into frames and multiply them by a window('hamming','hanning','blackman','bartlett','gausswin').It returns the signal frames.
2)A function that reconstructs the previous frames into the original i
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