AnsweredAssumed Answered

Frequency Filters with customizable parameters

Question asked by Nando.One on May 23, 2012
Latest reply on Jun 5, 2012 by Nando.One

Hi There!

 

Let's say I need to implement a certain frequency filter, IIR or FIR, (HPF, LPF, Passband, Bandstop etc). Implementing a fixed filter is "easy", we come up with the filter coefficients and that's it. But what if I have to implement a filter that the user must be able to tune parameters like Q factor, width, frequency, roll-off etc? 

 

The only way I could think of is that every time the user changes the "settings", the DSP must have internally the formulas so it can recompute itself the coefficients. Are there any alternatives?

 

How is that usually accomplished?

 

Sorry for the beginners question! If there is anywhere better in engineer's zone to post it, please feel free to move my post. I posted here because I'm experimenting with the SHARC EZ-KIT . Also, if anyone could indicate me a DSP forum for these "general" questions I would really appreciate too!

 

Thanks a lot!

 

All best,

 

Fernando

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