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Signal Processing

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  • $\begingroup$ perhaps it could be of more help if you could give some details of the communication system you are simulating. $\endgroup$ Commented Aug 18, 2011 at 13:38
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    $\begingroup$ I would assume you just generate noise for both I and Q and then add them. I don't see why the noise would be correlated between the two. $\endgroup$ Commented Aug 18, 2011 at 13:52
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    $\begingroup$ @endolith, The noise difference would only appear in the mixer, besides that they should share their noise signals. $\endgroup$ Commented Aug 18, 2011 at 14:07
  • $\begingroup$ Are you saying that you would to add it to the quadrature multiplexed signal? $\endgroup$ Commented Aug 18, 2011 at 14:11
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    $\begingroup$ @Kortuk is right. The noise between I and Q are in fact correlated. You have a signal, add noise, and THEN project it onto I and Q. Now, the original noise component is multiplied by a sin in one branch, as the original noise is multiplied by a cosine in the other. $\endgroup$ Commented Sep 26, 2011 at 23:06