Dear Cinaed,

The costas loop works only with BPSK, QPSK and 8PSK.

Is it possible to change the actual costas loop and add the 16 QAM.

Best regards,



2017-07-14 0:46 GMT+02:00 Cinaed Simson <cinaed.sim...@gmail.com>:

> On 07/13/2017 06:16 AM, Rafik ZITOUNI wrote:
> > Dear Cinaed,
> >
> > But how to see the constellations of my received symbols since
> > constellation receiver and constellation decoder have a byte as an
> output.
> >
> > Is it possible to have a costas loop for QAM 16?
>
> I use the Polyphase Clock Sync.
>
> In the tutorial 7, they use a channel model
>
>  Const. Demod -> Channel Model-> Polyphase Clock -> CMA Equalizer ->
> Costa Loop -> Demodulator
>
> and put the Constellation Sink on the output of the Costa Loop.
>
> -- Cinaed
>
> >
> > Thanks,
> >
> > 2017-07-13 1:30 GMT+02:00 Cinaed Simson <cinaed.sim...@gmail.com
> > <mailto:cinaed.sim...@gmail.com>>:
> >
> >     On 07/12/2017 09:55 AM, Rafik ZITOUNI wrote:
> >     > Dear Cinaed,
> >     >
> >     > Thanks for your answer.
> >     >
> >     > I tried with my Tx and it works fine with a constellation, but
> with my
> >     > receiver symbols or  constellation_decoder, digital.qam_16()[1]
> gives me
> >     > an error.
> >
> >     I'm using the Constellation Modulator/Constellation Decoder pair and
> the
> >     Constellation Object with Type=Variable Constellation.
> >
> >     The same object is used for both the Constellation Modulator and the
> >     Constellation Decoder.
> >
> >     When I look inside the Constellation Decoder there's nothing to
> >     configure.
> >
> >     Maybe you're doing things differently.
> >
> >     -- Cinaed
> >
> >     >
> >     > line 164, in __init__
> >     >     self.digital_constellation_decoder_cb_0_0 =
> >     > digital.constellation_decoder_cb(digital.qam_16()[1])
> >     >
> >     > Best,
> >     >
> >     >
> >     >
> >     >
> >     > 2017-07-12 2:26 GMT+02:00 Cinaed Simson <cinaed.sim...@gmail.com
> <mailto:cinaed.sim...@gmail.com>
> >     > <mailto:cinaed.sim...@gmail.com <mailto:cinaed.sim...@gmail.com
> >>>:
> >     >
> >     >     On 07/11/2017 05:13 AM, Rafik ZITOUNI wrote:
> >     >     > Dear gnuradio users,
> >     >     >
> >     >     > I am trying to use digital_chunks_to_symbols to reconstruct
> block by
> >     >     > block my QAM modulator.
> >     >     >
> >     >     > Please could you give me an idea how to set the
> constellation points in
> >     >     > Symbol Table field?  I can do it with BPSK, QPSK and 8PSK
> using
> >     >     > constellation[0].points, constellation[1].points and
> >     >     > constellation[2].points, but how can I do it with 16 QAM ?
> >     >
> >     >     Try
> >     >
> >     >      Symbols:        digital.qam_16()[1]
> >     >      Constellations: digital.qam_16()[0]
> >     >
> >     >     -- Cinaed
> >     >
> >     >
> >     >     >
> >     >     > For my 16 QAM receiver, could you please tell me if it's
> possible to
> >     >     > have a constellation points view?
> >     >     >
> >     >     > Best,
> >     >     >
> >     >     > --
> >     >     > **<http://www.ece.fr/>Rafik
> >     >     >
> >     >     >
> >     >     >
> >     >     > _______________________________________________
> >     >     > Discuss-gnuradio mailing list
> >     >     > Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org>
> >     <mailto:Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org>>
> >     >     > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >     <https://lists.gnu.org/mailman/listinfo/discuss-gnuradio>
> >     >     <https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >     <https://lists.gnu.org/mailman/listinfo/discuss-gnuradio>>
> >     >     >
> >     >
> >     >
> >     >     _______________________________________________
> >     >     Discuss-gnuradio mailing list
> >     >     Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org>
> >     <mailto:Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org>>
> >     >     https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >     <https://lists.gnu.org/mailman/listinfo/discuss-gnuradio>
> >     >     <https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >     <https://lists.gnu.org/mailman/listinfo/discuss-gnuradio>>
> >     >
> >     >
> >     >
> >     >
> >     > --
> >     > **<http://www.ece.fr/>Rafik
> >     >
> >
> >
> >
> >
> > --
> > **<http://www.ece.fr/>Rafik
> >
>
>


-- 
<http://www.ece.fr/>Rafik
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Reply via email to