清空筛选条件
清空筛选条件

Get autocorrelation function (ACF) two various ways

4 次查看（过去 30 天）
Ivan Volodin
Ivan Volodin 2017-3-23
Hello!
I would like to find ACF from signal
first_step=0;
step_t=0.01;
last_step=1;
N_=101;
t=first_step:step_t:last_step;
y= 10*sin(2*pi*30*t) ;
and since I have signal I do:
AutoCorr_func=autocorr(y,N_-1 );% need 101 points
which gives me this
also assuming that ACF is an integral of multiplying two function (one is original signal, another - signal with shifted argument to tau) My second way:
tau=0.1;
y1= 10*sin(2*pi*30*(t+tau)) ;
Y=y1.*y;
AutoCorr_func = cumtrapz(Y,t);
which gives me another result:
and both seems to be wrong. What is incorrect in my actions? How to do it right? Thank you!

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Signal Generation and Preprocessing 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by