Re: [Discuss-gnuradio] No simple_correlator output

[irene159]

irene159 wrote:
> 
> Hello,
> 
> I'm still working on QPSK modulation [1]. I think I found the solution for
> bit shifting (simple_framer/simple_correlator). I used uchar_to_float to
> convert the stream of unsigned char coming from the dqpsk demodulator to
> the stream of float expected at the simple_correlator input.
> Can anyone validate this?
> 
> -------------------------------------------------------------------------------------------------------------------------------------
> DEMODULATION
> -------------------------------------------------------------------------------------------------------------------------------------
>         ...
>         objDemod = dqpsk.dqpsk_demod()
>       conversion = gr.uchar_to_float()
>       correlator = gr.simple_correlator(p_size)
>         fg.connect(gr.file_source(gr.sizeof_gr_complex, "Modulated.dat"),
> objDemod, conversion, correlator,                                         
>                                                
> gr.file_sink(gr.sizeof_char,"Result.txt"))
> 
>         ...
> --------------------------------------------------------------------------------------------------------------------------------------
> 
> 
> However, there seems to be no simple_correlator output, Result.txt file is
> empty whereas I'm sure of having data coming out of uchar_to_float and
> into simple_correlator.
> 
> Regards,
> Irene
> 
> 
> 
> ----------------------------------------------------------------------------------------------------------------------
> MODULATION
> ----------------------------------------------------------------------------------------------------------------------
>         ...
>         bytes_src = gr.vector_source_b(arrTxt, False)
>         framer = gr.simple_framer(p_size)
>         objMod = dqpsk.dqpsk_mod()
>         fg.connect(bytes_src, framer,
> objMod,gr.file_sink(gr.sizeof_gr_complex,"Modulated.dat"))
>         ...
> -------------------------------------------------------------------------------------------------------------------------
> 
> 
> 
> [1] http://www.nabble.com/Modulation-problem---td17316660.html#a17316660
> 

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