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Altera_Forum
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16 years ago

FFT gurus...please help

I've been posting questions regarding design hiccups I've been encountering in my project. Thanks to those who responded in the past. I'm doing a phase correlation calculation in the fpga betw...
Altera_Forum's avatar
Altera_Forum
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16 years ago

I had the same problems when doing an algorithm for logs. Not sure on the number of bits you are using. But what I did was use say 4 bits out of 16 as a fractional decimal. Instead of allowing the value to zero, let it go to the smallest fractional part (1/16). This keeps the answer close to zero, so the results are about right.

I also would recommend simulating the math in software. This way you can try different values for zero, and find an optimum number for your needs.