Question

想要用matlab产生一个正弦信号加-1到1的均匀随机噪声进行量化处理怎么老出现错误

t=[0:0.005:10];
N=10;
s=2.*sin(2.*pi.*t);
x=s+2.*rand(1,N)-1;
plot(t,x)
[sqnr16,aquan16,code16]=upcm(x,8);
plot(t,x,'-',t,aquan16,'*')
legend('原始正弦信号','级数为16的PCM量化后信号');

Error in ==> Untitled7 at 4
x=s+2.*rand(1,N)-1;

Answer 1

clc;clear;

t=[0:0.005:10];

N=10;

s=2.*sin(2.*pi.*t);

[s_x,s_y] = size(s);

x = zeros(s_x,s_y);

for I = 1:s_x*s_y

    x(I) = s(I) +  2*rand(1,'double')-1;

end

subplot(2,2,1);

plot(t,s)

subplot(2,2,3);

plot(t,x)

Answer 2

t=[0:0.005:10];
N=length(t);
s=2.*sin(2.*pi.*t);
x=s+2.*rand(1,N)-1;
plot(t,x)

Answer 3

改成这样
x=s+(2.*rand(1,N)-ones(1,N));