Two pfb channelizer questions

Have been playing with the channelizer and it’s amazing! To re-raise an
old point: IMHO, By all means, the hARRIS (lowercase “h” notation)
should be kept, IMHO.

  1. Sorry if this has been previously asked but I wasn’t able to find it
  • say we want to channelize a swath but we’re only interested in a few
    of the channels and we want to ignore the rest (e.g., say we care about
    only 5 of 100 available channels, but there are gaps between the
    “interesting” ones)…

In this example would it be necessary to connect up the remaining 95
“uninteresting” channels to the null_sink ?

  1. This is perhaps more of a pfb question - our app uses
    gr.firdes.root_raised_cosine() which has the published restriction that
    “symbol rate must be a factor of sample rate” so that if the desired
    signal doesn’t have this property it must be resampled (such as using
    the pfb arb resampler). Question is whether there exists some “magic
    pfb” method of performing the root-cosine filtering operation directly,
    without needing a resamp. Probably pie in the sky, but was just
    curious…

Best Regards

Max