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[Discuss-gnuradio] parameters for poly-phase clock sync

From: Charles Brain
Subject: [Discuss-gnuradio] parameters for poly-phase clock sync
Date: Sun, 12 Feb 2017 14:49:51 +0000
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.7.1


I am trying to use the the poly-phase clock sync.
At high S/N levels it works very well but at low S/N  (<20dB S/N)
it's performance is very bad. Which probably means I have made a
mistake somewhere.

The parameters I am passing to the module to generate the mother filter are

samp_rate = 2000000
n_filters = 32 (number of filters in the filterbank)
symbol_rate = 1000000
0.35 is the filter's Beta
31 is the length of each filter in the filterbank

I have read the book the filter is derived from so I know what it is trying to do
but obviously I have messed up somewhere.


- Charles

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