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>-----------------------------------------------------------------
> exa011001_rand.m: for example 1.10.1
> to test rand.m and to generate the white noise signal u(n)
> with uniform distribution
> 产生均匀分布的随机白噪信号,并观察数据分布的直方图
>-----------------------------------------------------------------
clear;
N=50000;
u=rand(1,N);
u_mean=mean(u)
power_u=var(u)
subplot(211)
plot(u(1:100));grid on;
ylabel('u(n)')
xlabel('n')
subplot(212)
hist(u,50);grid on;
ylabel('histogram of u(n)')