cross correlation of monotonic signal
$begingroup$
I have two monotonic signals and I want to calculate the time delay between them.
Say for example my signals are:
s1 = [1 2 3 4 5]
s2 = [2 3 4 5 6]
To me these appear to be monotonic signals, with s2 having a delay of 1. But if I perform a cross correlation, which in my understanding is taking the dot product as I shift one of the signals, then the delay is calculated to be 0. The dot product of the unshifted signals is 70, which is larger than the dot product as I shift one of these signals and zero pad. I'm sure I'm missing something basic here, I'm just trying to understand why a cross correlation would not work here? Or more specifically why it doesn't give me the result of a single delay?
linear-algebra vectors signal-processing correlation
asked Dec 4 '18 at 18:24
mashmash
11
$endgroup$
add a comment |
$begingroup$
I have two monotonic signals and I want to calculate the time delay between them.
Say for example my signals are:
s1 = [1 2 3 4 5]
s2 = [2 3 4 5 6]
To me these appear to be monotonic signals, with s2 having a delay of 1. But if I perform a cross correlation, which in my understanding is taking the dot product as I shift one of the signals, then the delay is calculated to be 0. The dot product of the unshifted signals is 70, which is larger than the dot product as I shift one of these signals and zero pad. I'm sure I'm missing something basic here, I'm just trying to understand why a cross correlation would not work here? Or more specifically why it doesn't give me the result of a single delay?
linear-algebra vectors signal-processing correlation
asked Dec 4 '18 at 18:24
mashmash
11
$endgroup$
add a comment |
$begingroup$
I have two monotonic signals and I want to calculate the time delay between them.
Say for example my signals are:
s1 = [1 2 3 4 5]
s2 = [2 3 4 5 6]
To me these appear to be monotonic signals, with s2 having a delay of 1. But if I perform a cross correlation, which in my understanding is taking the dot product as I shift one of the signals, then the delay is calculated to be 0. The dot product of the unshifted signals is 70, which is larger than the dot product as I shift one of these signals and zero pad. I'm sure I'm missing something basic here, I'm just trying to understand why a cross correlation would not work here? Or more specifically why it doesn't give me the result of a single delay?
linear-algebra vectors signal-processing correlation
asked Dec 4 '18 at 18:24
mashmash
11
$endgroup$
I have two monotonic signals and I want to calculate the time delay between them.
Say for example my signals are:
s1 = [1 2 3 4 5]
s2 = [2 3 4 5 6]
To me these appear to be monotonic signals, with s2 having a delay of 1. But if I perform a cross correlation, which in my understanding is taking the dot product as I shift one of the signals, then the delay is calculated to be 0. The dot product of the unshifted signals is 70, which is larger than the dot product as I shift one of these signals and zero pad. I'm sure I'm missing something basic here, I'm just trying to understand why a cross correlation would not work here? Or more specifically why it doesn't give me the result of a single delay?
linear-algebra vectors signal-processing correlation
linear-algebra vectors signal-processing correlation
asked Dec 4 '18 at 18:24
mashmash
11
asked Dec 4 '18 at 18:24
mashmash
11
asked Dec 4 '18 at 18:24
mashmash
11
asked Dec 4 '18 at 18:24
mashmash
11
asked Dec 4 '18 at 18:24
mashmash
11
11
add a comment |
add a comment |
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