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[Discuss-gnuradio] Questions regarding hierarchical polyphase channelize

From: Piotr Krysik
Subject: [Discuss-gnuradio] Questions regarding hierarchical polyphase channelizer
Date: Mon, 24 Oct 2016 15:30:36 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0

Hi all,

Recently I did simple benchmark of hierarchical polyphase channelizer
block (written by Ben Reynwar according to git blame) vs regular
polyphase channelizer block. It seems that hierarchical version is 2-3
times faster.

The documentation of the hierachical polyphase channelizer seems to be a
bit too brief though (at least for me). This topic has been touched on
this list before, but produced no more info about the block (in the
"hierarchical polyphase channelizer vs polyphase channelizer blocks in
GRC​" thread).

A bit more info is needed about the block's parameters and how it
capabilities relate to normal polyphase channelizer block. Especially:

-what n_filterbanks parameter is for?

-is it possible to do oversampling of the signal at the output channels
with this block the way it is possible with normal polyphase channelizer


Thanks and regards,

Piotr Krysik

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