Hi Gerry, I am glad someone is interested in this. To be clear we have a need for an inverse PFB, but have not developed one ourselves—no where near to ready to publish. ;) Our take was the “step by step” was needed, inverse FFT followed by FIR, and that probably it would not be entirely trivial. While inverse FFT itself is rather simple.
I put the question to the list serve in the hope someone has already worked on this. I hereby bump this up, perhaps this is a better time to do so, compared to Friday afternoon. Jona > On Dec 5, 2014, at 7:12 PM, Gerry Harp <[email protected]> wrote: > > Hi Jonathan > > This is interesting. Is an inverse PFB is just a PFB using an inverse FFT? > That should be very close by possibly not bit-perfect inversion. > > Or are you considering a step-by-step inverse of the PFB algorithm? I'm > interested because there are traps. Small numerical errors are magnified when > you compute the inverse FIR filter on the data after inverse FFT. At least I > think so. > > I'd be interested in your implementation of the inverse PFB. You should > publish it. > > Thanks > > Gerry > > The reason I'm asking is that if you lose any > > On 05-Dec-14 01:36 PM, Jonathan Weintroub wrote: >> Hello CASPERites, >> >> Has anyone implemented an _inverse_ PFB? That is a block taking channelized >> PFB data and reproducing the original time series. >> >> If so, is the code/mdl/yellow block available? >> >> Thanks, >> >> Jonathan >> >> >> >
