How to convert floating point filter coeffiecients ( generated from FDA tools) to fixed point without Fixed point toolbox

Hi All, I am trying to design a decimator and a FIR filter using FDAtool, but I cant generate COE file for xilinx since I don't have fixed point addon, Is there a way to convert all the filter coefficients to fixed point without having fixed-point tool box, if there is any script or function present?. I can export the coefficient to ASCII files or to the workspace but need those coefficients in fixed point. Please let me know how to do that. Thanks,

Answer 1

[Muthu Annamalai]

Did you try the fixed point conversion tool ?

It generates fixed point MATLAB code as intermediate output during generation of fixed point C or HDL Code.

http://www.mathworks.com/help/coder/fixed-point-conversion.html

[Ankit Gupta]

Hi ,

I cannot open the link you sent me. I have Signal processing toolbox, and I used fdatool gui. I was looking if there is a way to convert those coefficients to fixed point without having fixed point designer.I am currently trying to do those manually by using " norm " and multiply it with 2^n-1 where n is number of bits. I am saving all the coefficient in the workspace and then trying to convert them to fixed point.