Hello guys, I was wondering if anyone faced the issue of ringing in the pass-band and the stop-band when simulation a PFB with a noise signal, when using a PFB processing a multiple stream.
My initial design was like, I have a quad-adc, the outputs are connected to a PFB with 2^1 inputs, with bi-plex on, so it would be able to process 4 input streams. The pfb output is FFTd and accumulated. When I checked the output, i found a kind of ringing in the stop-band and the pass-band of my output spectra. But when I used individual pfb blocks for each inputs, I did not have this issue and ringing had disappeared. I have shared the plots in the following google document. Has anyone else seen this behaviour with a multi input pfb block ? Thank you, Mugundhan P.S. : google doc link containing the plots: https://docs.google.com/document/d/1T5wMi2e3Ce_huP0ESohc98QqEuTKnKE_9Ra6qWoqoLU/edit?usp=sharing
