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From: | Jérémy Skelton |
Subject: | [Discuss-gnuradio] Simple QPSK baseband transmission using GRC |
Date: | Thu, 4 Dec 2008 21:11:48 +0100 |
Hi,I have been trying to make a baseband transmission by assembling blocks with GRC.
I'm using this scheme : http://www.skelton.eu.org/Image1.pngTo problem is that I'm not able to recover the original data but only the repetitions of it : I repeat several times two bytes in the input file and I get several two other bytes at the output.
Any idea to solve this ? Is it possible that the decoding block takes a bad phase (maybe due to quadrature demodulation)? If so, what block can I use to make the phase correction ?
Thanks, Jérémy
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