[Discuss-gnuradio] PFB Filterbank & arbitrary resampler

[Ryan Pape]

 

We are successfully using the PFB filterbank to channelize 1-6mhz into a variety of channel widths (25K, 50K etc).

 

In one application, we have 25K channels which are then resampled using PFB resampler to 19.2K fed into gmsk_demod @ 9600bps with 2sps.

 

In this case, we may have 20-40 ports "active" (not null sink) with pfb resamplers connected to each.

 

Is there  way to perform this resampling in the filterbank to avoid the need for many separate resampler blocks in an effort to improve performance?

 

We are pushing the limits of hardware already, so any efficiencies are helpful.  We will consider a hierarchical filterbank structure if necessary, but our first goal is to do it with one filterbank, if possible.