correlation of speech signal

i hav a speech signal which contains noise. sampling frequency 8000Hz

how can i perform the autocorrelation of this signal with the delay of 100 samples?

Answer 1

[Wayne King]

Do you have the Signal Processing Toolbox? If so, you can use xcorr()

I'll give you an example

load mtlb;

[xc,lags] = xcorr(mtlb,100,'coef');

xc above is 201 samples long with the autocorrelation out to lags of +/- 100 (plus 0)

You can just extract the positive lags with

stem(lags(101:end),xc(101:end))