Hi,
First you should have a look at the PSK demodulation tutorial :
http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorial_PSK_Demodulation
.
It uses a Polyphase Clock Sync between the receiver and the
constellation decoder.
Alternatively, you can use the Constellation Receiver which is a
Constellation Decoder with freq and phase correction.
But if you want a more simple solution, the DPSK Mod/DPSK Demod blocks
seems like the best solution.
When your receiver works, you can have a look at the Packet Operators
to send delimited messages.
Good luck.
Le sam. 28 nov. 2015 à 9:55, Ekko <[email protected]> a écrit
:
hello all
i want to transmit a file with the way of QPSK
this is my send grc
file source----repack bits-----chunks to symbol-----multile
const------uhd_ink
this is my receive grc
uhd_source-----constellation decoder-----repack bits-----file sink
next is the "qt gui constellation sink" of the oupotput of
chunks to symbol in the send
next is the output of UHD_source in recieve "qt frequence sink""qt
gui constellation sink"
in this picture ,i think the recieve got the signal,but i do not know
the constellation mean,
next is the set of my uhd_source and uhd_sink
source
sink
my problem is that my recieve file is completely different with
the source file
i use simulation way (no uhd),the recieve is same as source,
so i think there is some block needed between the constellation coder
and uhd_source,for example the sync block
hope someone knows how to solve this sync problem or how to transmit
a file with QPSK on e310 with the antenna
thank you
---Ekko
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