Re: [Discuss-gnuradio] Chunks to symbols with 16 QAM modulation

[Rafik ZITOUNI]

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? 

Thanks, 

2017-07-13 1:30 GMT+02:00 Cinaed Simson <address@hidden>:

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 <address@hidden
> <mailto:address@hiddencom>>:
>
>     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
>     >
>     >
>     >
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>
>
>
>
> --
> **<http://www.ece.fr/>Rafik
>

--

Rafik