AWGN input/output erros

I have a problem at a simuling "AWGN channel" modulation / demodulation QPSK ... the error that appear is : """ Error reported by S-Function 'scomawgnchan2' in 'essai2/AWGN Channel/Dynamic AWGN': When the 'Mode' parameter is set to 'Signal to noise ratio', the input and output must have discrete sample times. """" thank you

[Image Analyst]

Please paste the full error message - ALL THE RED TEXT . Don't snip out just a part of it and tell us partial information. I mean, we can't even see your code so how can we know how to fix it? Please read this.

[ghada]

this is why i try to do...without AWGN the block work correctly but when i tried to add the AWGN channel an erros message appear ... i hope someone help me it's urgent....thanks

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[ghada]

answer me please...i can't find a solution to this problem

Answer 1

[kangbo zheng]

I make the same mistake.

Answer 2

[Christian Martinez]

I have the same error pop up whenever i run my digital comm system, i read in an 2008 forum we just have to change the continuous values of the output on the modulator block into a discrete output. So the discrete values can get to the awgn channel...