PN Sequence

[sjl006]

Hi,

I'm trying to graph a voltage histogram of an antipodal PN sequence with white Gaussian noise added onto it. I was able to successfully graph the gaussian distributions on both +V and -V and fit them using the gaussian peak fit. However, the standard deviations that come out of the gaussian fits are not the standard deviation that I put in for the AWGN to add onto the PN sequence. Can somebody please explain why there would be a difference in the standard deviation of my fits and the standard deviation that I input into the AWGN for my PN Sequence? I don't think it's my program b/c the fits are almost exact and I do see the gaussian distributions on the PN sequence.

Thanks,

Sammy

P.S. I'm also using a PXI-5620 Digitizer (Sampling rate 64MS/s) and a PXI-5441 AWG.

[sjl006]

I've also attached a picture of the program. Thanks again!

- Sammy

[kalyanramuv]

Hi Sammy,

Can you post your code. It is easier to answer you code in that way.

Thanks,

Kalyan