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[Discuss-gnuradio] QPSK Modulation and Demodulation Question

From: 梁帆
Subject: [Discuss-gnuradio] QPSK Modulation and Demodulation Question
Date: Tue, 7 Aug 2018 15:08:51 -0500
Hello All,

I am using the Gnuradio for two weeks. I am doing the Gnuradio tutorial 7 on stage 5. There I used PSK demod to demodulate the signal. I do not know why the output signals are different than input signal. This is the screenshot of my blocks. Is that because my vector source influence the result or should I use the My_Qpsk_demod block on tutorial 4.

Thanks
Fan

Attachment: Screenshot from 2018-08-07 15-06-50.png
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Attachment: Screenshot from 2018-08-07 15-07-01.png
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Attachment: Screenshot from 2018-08-07 15-07-07.png
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Attachment: Screenshot from 2018-08-07 15-07-17.png
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