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Altera_Forum
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15 years ago

Number Scaling

Hi, What is the most efficient way to scale numbers into the range of -1, 1 in Verilog using Cyclone II? That is the fastest code with least resources? are there any free IP cores from Altera o...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

you need to explain when you say it does not match the value, which value? Accuracy can be increased by better rounding the term:

(2^16-1)/579 which = 113.18652849740932642487046632124...

e.g. maultiply by 2^10 = 115903.005 = 115903 then truncate 10 LSBs from result then subtract 32767.

Your format of 1 sign 5 integer 10 fraction is not covered in above equation as I assume 1 sign 15 fraction since you hardly need 1 bit for integer(-1 ~ +1)