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Altera_Forum
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11 years ago

Inphase (I) and Quadrature (Q) components of signals

Hi All, How to calculate the Inphase (I) and Quadrature (Q) components of signals, such as RF signals? I would like to shift the RF signals to a specific baseband frequency and then derive the ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Hi Dave,

I can use NCO megaCore function to generate I and Q data now. Got a question for CIC and FIR MegaCore functions. Should the inputs to these two filters in unsigned/sign integer number format or unsigned/sign fractional number format (p4-1, FIR Compiler User Guide attached)? I think unsigned/sign fractional format means a number is always smaller than 1. So floating number input such as 12.111 is not allowed. Is is corret?

Many Thanks,

Lee