Design a lowpass FIR filter for data sampled at 48 kHz. The passband-edge frequency is 8 kHz. The passband ripple is 0.01 dB and the stopband attenuation is 80 dB. Constrain the filter order to 120. Get N = 120; Fs = 48e3; Fp = 8e3; Ap = 0.01; Ast = 80; Obtain the maximum...
filtSpecs=fdesign.lowpass(...Fpass,...%通带频率 Fstop,...%阻带频率 Apass,...%通带波纹 Astop,...%阻带衰减 Fs);%采样频率 然后,使用designmethods函数可以输出针对滤波器规格对象filtSpecs可用的滤波器设计方法,Matlab代码如下所示: 代码语言:javascript 复制 %查看可用的滤波器设计方法designmethods(filt...
dk=designfilt('lowpassfir',...%低通滤波器'PassbandFrequency',Fpass,...%通带频率'StopbandFrequency',Fstop,...%阻带频率'PassbandRipple',Ap,...%通带波纹'StopbandAttenuation',Ast,...%阻带衰减'DesignMethod','kaiserwin');%使用Kaiser窗方法设计滤波器%即将滤波器dk添加到绘图结果中addfilter(hfvt,dk...
matlab 低通滤波器(Matlab low pass filter) Abstract A filter is an electronic device that enables a useful signal to pass smoothly while suppressing unwanted (or decaying) frequency signals. It is often used for signal processing, data transmission and interference suppression in engineering. The ...
Learn how to use and design low-pass filters. Resources include videos, examples, and documentation covering digital filters and other topics.
可以通过Filter Builder交互界面设计,这里选择Lowpass。 指定参数,选择FIR滤波器,采样频率128Hz,通带截止频率15Hz,阻带截止频率16Hz。通带最大波纹0.1dB,阻带最小衰减60dB。这里选用Kaiser窗法设计(或等波纹法equiripple)。 可以生成对应的代码 1 2 3
我们将字长设为20(再次提醒:要根据项目实际进行设计,此处的字长越大设计出来的数字滤波器越接近理想情况,但是相应的数据位宽也会急剧增长),可以看到低通滤波器对高频信号的衰减能够轻松达到100dB以上。其他参数设计采用默认。点击“目标”——>...
matlab低通滤波器(Matlab low pass filter).doc,matlab低通滤波器(Matlab low pass filter) Abstract A filter is an electronic device that enables a useful signal to pass smoothly while suppressing unwanted (or decaying) frequency signals. It is often used
lowpassFilt = dsp.LowpassFilter(DesignForMinimumOrder=false,...FilterOrder=N,PassbandFrequency=Fp,SampleRate=Fs,...PassbandRipple=0.01, StopbandAttenuation=80); ticwhiletoc < 10 x = randn(256,1); y = lowpassFilt(x); scope(y);end
>> d = designfilt('lowpassfir', ... 'PassbandFrequency',0.15,'StopbandFrequency',0.2, ... 'PassbandRipple',1,'StopbandAttenuation',60, ... 'DesignMethod','equiripple'); >> y = filtfilt(d,x); >> y1 = filter(d,x); >> subplot(2,1,1) ...