数字信号处理实验答案Word文档格式.docx
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c=
2345
n=(0:
3);
stem(n,c);
stem(n,c,'
fill'
);
2信号与标量的乘积ax(n)
a=[1234];
c=3*a
36912
3两个信号相乘x1(n)*x2(n)和乘方an
a=[2222];
b=[1234];
c=a.*b
2468
4信号折叠x(-n):
fliplr
function[y,n]=sigfold(x,n)
%Ê
µ
Ï
Ö
y(n)=x(-n)
y=fliplr(x);
n=-fliplr(n);
return
x=[12345]
x=
12345
n=[01234]
n=
01234
[y,n]=sigfold(x,n)
y=
54321
-4-3-2-10
m=(0:
4);
stem(m,y);
stem(m,y,'
stem(m,n);
stem(m,n,'
5信号的卷积
b=[11111];
c=conv(a,b)
12344321
7);
6length(x)函数
length(x)
ans=
5
stem(n,x);
stem(n,x,'
7课后题
(1)
15);
x=0.8.^n
Columns1through10
1.00000.80000.64000.51200.40960.32770.26210.20970.16780.1342
Columns11through16
0.10740.08590.06870.05500.04400.0352
(2)
x1=[-201-13];
x2=[120-1];
x=conv(x1,x2)
-2-413151-3
stem(n,x1);
stem(n,x1,'
stem(n,x2);
stem(n,x2,'