n1=0:9;
N1=64;
x1n=2*cos（0.2*pi*n1）;???????????????????????????
X1k=fft（x1nN1）;????????
k=0:N1-1;wk=2*k/N1;?
subplot（331）;plot（wkabs（X1k））;
title（‘（a）x_1（n）的幅頻特性曲線‘）;xlabel（‘\omega/\pi‘）;ylabel（‘幅度‘）;grid?on
subplot（334）;plot（wkangle（X1k））;?%axis（[09-33]）?
title（‘（b）x_1（n）的相頻特性曲線‘）;xlabel（‘\omega/\pi‘）;ylabel（‘相位‘）;grid?on

n2=0:50;
N2=512;
x2n=2*sin（0.45*pi*n2）.*sin（0.55*pi*n2）;?????????
X2k=fft（x2nN2）;????????
k=0:N2-1;wk=2*k/N2;?
subplot（332）;plot（wkabs（X2k））;
title（‘x_2（n）的幅頻特性曲線‘）;xlabel（‘\omega/\pi‘）;ylabel（‘幅度‘）;grid?on
subplot（335）;plot（wkangle（X2k））;??
title（‘x_2（n）的相頻特性曲線‘）;xlabel（‘\omega/\pi‘）;ylabel（‘相位‘）;grid?on

n3=-10:10;
N3=64;
x3n=0.5.^abs（n3）;???????????????????????????????
x3np=zeros（1N3）;???????????????????????????????
for?m=1:1

?屬性????????????大小?????日期????時(shí)間???名稱(chēng)
-----------?---------??----------?-----??----
?????文件????????1181??2017-12-07?14:08??SY1.m
?????文件?????????463??2017-12-05?14:56??SY2_1.m
?????文件?????????501??2017-12-07?13:38??SY2_2.m
?????文件??????122791??2017-12-07?19:45??實(shí)驗(yàn)一報(bào)告.docx