is the "qammod" function in communication toolbox not compatible with hdl coder in version R2013a?

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i am trying to generate VHDL code of 16 QAM MODULATION from matlab code using HDL CODER. my code is
function mod_data =qammod(data_in_sym,M);
n=8
M=16
no_of_rows=n/4; no_of_bits_in_symbol=4;
data_in=[1;1;0;1;0;1;1;0];
data_instp=reshape(data_in,no_of_rows,no_of_bits_in_symbol);
data_in_sym=bi2de(data_instp);
now when i use the workflow adviser the following erroe comes:
??? Output argument 'mod_data' is not assigned on some execution paths.
Error in ==> qammod Line: 1 Column: 20
please point out the mistakes and give its solution.
  5 Comments
Walter Roberson
Walter Roberson on 20 Mar 2014
I am having difficulty determining at the moment whether qammod() is supported for code generation. It appears to me that there is an alternate coding that is supported; see http://www.mathworks.com/help/comm/ug/digital-modulation.html#fp59559
Anuj Aggarwal
Anuj Aggarwal on 20 Mar 2014
this is the error for the above code
???The function 'qammod' is not supported for standalone code generation. See the documentation for coder.extrinsic to learn how you can use this function in simulation.

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Answers (1)

Ryan Livingston
Ryan Livingston on 2 Apr 2014
I'm not certain of your needs but the System Object comm.RectangularModulator is supported for HDL Coder:
It may allow you to achieve what you need.

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