sum of signal noise ratio?

Sep 11, 2004 2 Replies
H

If you have two system, one SN is a, another is b. If they are summed, what is SN? Assuming they can be summed for same properties.


Hui



Vote
Twitter Facebook LinkedIn
J

Hi,

SN?

In the case of two uncorrelated noise sources mixed with identical signals of the same amplitude, I think there should be a 3dB improvement in S/N ratio. The voltage resulting from two such noise signals would be equal to the square-root of their sum but the signals alone would add normally. That is, uncorrelated noise powers add normally but the sum of their voltages do not.

Cheers - Joe

Vote
Twitter Facebook LinkedIn
J

Hi,

Oops! the last sentence should read - That is, uncorrelated noise powers add normally but their voltages do not. Cheers - Joe

Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required