I am trying to implement an IIR filter on a LPC1769 (I don't know if it's relevant). I already have the H(z) so all the design part is prety much solved. What I am looking for is information about:
- How to select an appropiate word lenght for the coefficients, acummulator, etc.
- How to select the most appropiate structure (parallel,cascade, direct forms, indirect forms....) (or some guidance at least)
- Some understanding on how to avoid overflow (scalling the coefficients or signal)
- A deeper explanation of the fdatool parameters than the one given in real-time digital signal processing.
I've been using the fdatool of matlab to play around with the quatization of the filter. But I don't know the implications of these or what they actually mean.
I've also been reading a few chapters of this book: real-time digital signal processing : implementations and applications sen m. kuo, but I am looking for more detail in these implementation aspects. So could you tell me of some book, application note, paper or whatever that explains these issues?
I am triying to implement an A-weighting filter (the transfer function is in the link). The application is mainly taking data from the adc, perform the A-weighting and taking the RMS value of this signal.