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From: | Timothée COCAULT |
Subject: | Re: [Discuss-gnuradio] transmit file with qpsk on e310 |
Date: | Sun, 29 Nov 2015 20:01:39 +0100 |
hifollow your suggestion ,i use the "PSK mod" and "PSK demod",just like
is it clear,if not i will upload my grc file
now,i set the vector source ,vector="0,1,2,3,4,5,6,7,8,9"and i transmit it,receive it into a filei found that in my file,it is not the sequence in vector source0123456789,just the part of this sequence.i think that some number was lose.(is it right?)i want to know how to Reduced this lost of number,for example some block need to be added.the "psk demod" got the freq and phase correction itself.and waht is the delimited messages.thank you--Ekko2015-11-29 1:26 GMT+08:00 Timothée COCAULT <address@hidden>: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 <address@hidden> a écrit :
hello alli want to transmit a file with the way of QPSKthis is my send grcfile source----repack bits-----chunks to symbol-----multile const------uhd_inkthis is my receive grcuhd_source-----constellation decoder-----repack bits-----file sinknext is the "qt gui constellation sink" of the oupotput ofchunks 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_sinksourcesink
my problem is that my recieve file is completely different with the source filei 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 blockhope someone knows how to solve this sync problem or how to transmit a file with QPSK on e310 with the antennathank you---Ekko
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