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Altera_Forum
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11 years ago

how to choose to truncate signal width

when the signed signal pass through multiply or FIR ,the signal width extend.how should i choose to truncate the signal width . generally,we truncate (LSB)Least Significant Bit ,retain MSB. But,in my...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Hi,

It sounds like the intermediate value is so low that you loose the significant bits by trunkating on LSB. Maybe you need to analyze the data path theoretically to understand where the significant bits are in each step of the design to maximize the dynamic range. How about using fixed point arithmetics?

Thanks

J