I've switch back with filters, and I'd like to implement a IIR filters,also because I've seen that there are different papers about IIR filters in CUDA,but I didn't see any implementation.
I've see that actually gnuradio is using a direct form I implementation,which cannot be easily ported.
So I've looked about cascade and parallel FIR filter. My question is: which is best in terms of stability?Is acceptable to decompose the transfer function in sub-function with only one pole?or could it cause instability?(e.g. conjugate poles).
Otherwise,due to the fact that both approaches(parallel and cascade) require only the previous output,I think what the implementaion would be not difficult: thanks to the expansion of recurrence _expression_, is "sufficient" something like a parallel sum prefix.
Thanks,
Marco Ribero