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[Discuss-gnuradio] Wrong ideal points on USRP1(gnuradio 3.2 rev.11223)?
From: |
tom_unaff |
Subject: |
[Discuss-gnuradio] Wrong ideal points on USRP1(gnuradio 3.2 rev.11223)? results form IQ const. plotting. |
Date: |
Tue, 27 Oct 2009 14:56:04 -0700 (PDT) |
Hello,
I do IQ plotting for DBPSK, DQPSK, 8PSK. (Please have a look below):
For DBPSK:
http://omploader.org/vMm16Zg/dbpsk_IQ_plotting.png
For QPSK:
http://omploader.org/vMm16Zw/dqpsk_IQ_plotting.png
Can someone explain why for DQPSK positions of ideal points are wrong? It
should be [1,1], [-1,1],[-1,-1],[1,-1]
Also for DBPSK, Why symbols on right site (of Y-axis ) are far away from
point, [1,0]? How to fix it?
Regards,
Tom
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- [Discuss-gnuradio] Wrong ideal points on USRP1(gnuradio 3.2 rev.11223)? results form IQ const. plotting.,
tom_unaff <=