Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

FIR filter coefficient scaling and downscaling

I have a sensor signal which is unsigned 12 bits and i need to filter the signal using a FIR filter. The filtered output feeds into an algorithm which expects 12bit unsigned input. I have used...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

IMHO you should replace sum(coefs) with sum(abs(coefs)) everywhere, and the algorithm will work a lot better.

Read a book on convolution and you will find out why.