谁能帮我把这组数据离散傅立叶变换一下
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谁能帮我把这组数据离散傅立叶变换一下
{0,71,100,71,0,-71,-100,-71,0,71,100,71,0,-71,-100,-71,0,71,100,71,0,-71,-100,-71,0,71,100,71,0,-71,-100,-71,0} 给出变换结果,并画出幅度谱、相位谱、功率谱 最好给出过程,越详细越好,
{0,71,100,71,0,-71,-100,-71,0,71,100,71,0,-71,-100,-71,0,71,100,71,0,-71,-100,-71,0,71,100,71,0,-71,-100,-71,0} 给出变换结果,并画出幅度谱、相位谱、功率谱 最好给出过程,越详细越好,
![谁能帮我把这组数据离散傅立叶变换一下](/uploads/image/z/15850664-8-4.jpg?t=%E8%B0%81%E8%83%BD%E5%B8%AE%E6%88%91%E6%8A%8A%E8%BF%99%E7%BB%84%E6%95%B0%E6%8D%AE%E7%A6%BB%E6%95%A3%E5%82%85%E7%AB%8B%E5%8F%B6%E5%8F%98%E6%8D%A2%E4%B8%80%E4%B8%8B)
matlab程序:x=[0,71,100,71,0,-71,-100,-71,0,71,100,71,0,-71,-100,-71,0,71,100,71,0,-71,-100,-71,0,71,100,71,0,-71,-100,-71,0]; n=512;%做N点FFT [h,w]=freqz(x,1,n); %h为dft后的频谱的幅值,w为h所对应的频率 p=abs(h).^2 %求功率谱 figure(1) plot(w/pi,abs(h)); %幅度谱绘图,角频率都进行了归一化 figure(2) plot(w/pi,angle(h)); % 相位谱绘图 figure(3) plot(w/pi,p); %功率谱绘图 程序是对的,你应该能画出图来了,不行我再上传