LabVIEW
Complex exponential
解決済み
@AliSabra wrote:
Hello guys,
I want to multiply a signal by a complex exponential just as in the second picture. Is it correct the way I did it ? See the first picture below
The idea is to multiply a signal by a two ray channel (second pic). Is it correct to multiply a complex signal with the Doppler shift this way ?
Best regards,
Ali Sabra
It seems OK to me.
You can test by putting it in a for loop, or applying the formula to a ramp. That should give an output of a sin in Im and a cos in Re (or vice versa).
Search LabVIEW like a graph! 
You're multiplying a single value (scalar) with a signal.
You should be multiplying a signal (the original) with the generated signal (a ramp put through the formula).
Both are functions or time, you now only have one function as time.
@AliSabra wrote:
I dont see the I and Q
To see the I and Q, you'd need to split the signal up into the Im and Re of the result...
Sure, but it's LV CG:
It's clear that multiplying the signals, adds the frequencies.
@AliSabra wrote:
Maybe the configuration isn't correct ?
I'm not into NXG enough to adive on that...
Apparently, those signals do work with complex numbers, but the ramp signal seems to be different than the sine?
