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# Questions tagged [cross-correlation]

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### Relation and differences between correlation sequence and correlation matrix

Suddenly I am stuck at a question while studying Statistical signal processing: What are the differences between correlation sequence and matrix (can be auto/cross), and how are the two related? When ...
1 vote
101 views

### Show that the impulse response of an LTI system can be determined by observing the output and inputting white noise

Problem Show that the impulse response of an LTI system can be determined by observing the output and inputting white noise. Attempt Let $x(t)$ be the input signal (white noise) and $y(t)$ be the ...
• 436
62 views

### Signal Detection in Noise

I have known pulses, e.g. $A\exp(-\frac{t}{\tau})\cos(\omega t)$, but they are "hidden" in additive (let's say Gaussian) noise and it is not possible to predict when such events will occur. ...
• 103
1 vote
85 views

### How to calculate the cross-correlation of two signals that have different sizes?

I have two video signals of the same video. One encoded in MPEG format and the other in H.263 format. These signals are represented in .txt files with the frame sizes in an array. I need to calculate ...
108 views

### Significance of imaginary part of auto-/cross-correlation

In this answer to this question, we get a hint that there is a significance to the imaginary part of the auto-correlation function, and that we should try to calculate the correlation with the real ...
124 views

### Cross Correlation Peak Value of Wideband signals - The Phase and Sample Offset are related but how

Two CDMA Codes or Gold Codes or PRN Sequencies, i.e. a pattern in time, are cross correlated in the time domain. However one of them is delayed compared to the other. How is the phase argument of the ...
• 45
34 views

### How does padding two vectors for cross correlation affect result of time delay?

For example, i have two signals (x and y). If I zero pad both vectors at the end by length ...
36 views

### How to reliably find audio interface recordings in mobile phone recordings

For scientific research, I recorded a few singers with several devices in a recording room. Two of these devices were proper microphones connected to an audiointerface, and they were positioned right ...