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Correction to Guided_Tutorial_PSK_Demodulation

From: Barry Duggan
Subject: Correction to Guided_Tutorial_PSK_Demodulation
Date: Tue, 7 Jul 2020 10:54:55 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.10.0

- https://wiki.gnuradio.org/index.php/Guided_Tutorial_PSK_Demodulation#Decoding
- https://github.com/gnuradio/gnuradio/issues/3599

I have found, corrected, and tested the problems with mpsk_stage6.grc
The order of blocks should be Constellation_Decoder, Differential_Decoder, and Map.
The receive Map should be [0,1,2,3].
The corrected flowgraph is in https://pastebin.com/2mRCzmPF
Once you go to the pastebin link, you need to click on the 'raw' icon to get the unformatted text.

I have tested with and The author of issue 3599 tested with If any of you can test it for me before I write a PR, I would appreciate it!

Thanks :)
Barry Duggan KV4FV

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