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Altera_Forum
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16 years ago

Fixed Point or Floating point implementation

I need to implement closed loop controllers like multiple PID controller in FPGA. I also need to do some signal preconditioning and signal processing in fpga. I would like to know if its bett...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

If your controller parameters cover a wide dynamic range, you'll possibly find, that implementing variable scaling respectively a parameter exponent involves less overall effort than extending the word length. In so far, it can be still meaningful to use a combination of float and fixed point variables in signal processing or digital controllers. But you most likely won't use standard IEEE float formats.