someone no how to implement Gaussian filter.

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Dear all:
I need to implement Gaussian filter to do modulation FSK.
Someone know how to implement Gaussian filter in FPGA
or algorithm or code?

Thanks .
 

hi,

go here and do a search with string "gaussian filters"

/http://www.mathworks.com/matlabcentral/fileexchange/loadCategory.do

u ll land up with many. i also think tehre is inbuilt gaussian filters in matlab. u can get an idea from them also.

i managed to get thswe 2 for u. i ll reply incase i get any literature on this stuff. am sure there are many. just go tto search for it!

/http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=5237&objectType=file
/http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=5315&objectType=file

/cedance
 

Gaussian filter is named due to the form of its impulse responce
which is similar to the Gaussian distribution.
Such filter is very simple, its Z responce is equal to

H(z)=(1+Z^-1)^n .
Where n+1 is the filter order.
So it can be implemented without any multiplier.
As a result, the equivalent usual FIR filter has the coefficients
which are equal to the binomial coefficients:
1,2,1 or 1,3,3,1 or 1,4,6,4,1, etc.
 

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