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Re: [Discuss-gnuradio] Pi/4 Mod-Demod
From: |
Sylvain Munaut |
Subject: |
Re: [Discuss-gnuradio] Pi/4 Mod-Demod |
Date: |
Fri, 10 Oct 2014 12:12:46 +0200 |
Hi,
> I’m interested in, and looking into the Pi/4 QPSK modulation technique
> (http://en.wikipedia.org/wiki/Phase-shift_keying#.CF.80_.2F4.E2.80.93QPSK).
>
> Has anyone worked on this before and does anyone have any blocks or code
> that I could use for reference while making my own? Any help, links, blocks
> or code would be greatly appreciated!
Just rotate it by pi/4 using a rotator block, then treat it as QPSK
(for which there are GR blocks).
It's not a GR block but I work with pi/4 whithin the osmo-gmr project.
What's the target application ? Is it bursts or a continuous signal ?
Cheers,
Sylvain