Undefined function 'awgn' for input arguments of type 'double'.
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I am using simulink 2012a version and when I cut and paste the code from the help utility, t = 0:.1:10; x = sawtooth(t); % Create sawtooth signal. y = awgn(x,10,'measured'); % Add white Gaussian noise.
I get the above error. I changed "x" to a matrix of zeros(1,10000) and I still get the same error message so it is not the data type of input. Do I need to load a particular library?
Thanks for your help
5 个评论
TAB
2012-6-14
Are you using above code in Embedded Matlab function block ?
Mark
2012-6-14
TAB
2012-6-14
"I am using simulink 2012a version" -- what it means ?
Do you mean Matlab 2012 version ?
Mark
2012-6-14
Avinas Vem
2012-9-18
I have a similar problem.Weird thing is I had my awgn function working yesterday.But today on the same system it doesn't work.And yes I have my communication systems toolbox installed.(ver tells me that i have that toolbox)
snr=3; x=ones(10,1)'; y=awgn(x,snr); Undefined function 'awgn' for input arguments of type 'double' " is the message displayed.
Should i unlock the Comm Systems toolbox or something?
采纳的回答
Wayne King
2012-6-14
2 个投票
You need the Communications System Toolbox. Do you have that installed?
Enter
>>ver
to see if you have an entry like:
Communications System Toolbox Version (R2012a)
3 个评论
Mark
2012-6-14
Wayne King
2012-6-14
There is your answer. If you want to add white Gaussian noise, you can use randn()
Noor Khan
2012-12-5
I have the same problem. Moreover, the randn function is not working as well. what can I do now? help required please. Thanks.
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