Re: [Discuss-gnuradio] scalar and vector streams

[Vincenzo Pellegrini]

thanks Josh,

(yes.. I'm trying to move as near as possible to ofdm on the python
level)
before diving into c++ block designing.

I usually watch the doxygen.. but the point is:
how can I be sure.. and learn details about the usage... eg. the
question about gr_fft you've just kindly asked..
..
shall I just guess and then bother  some experienced guy on the list? :)

for example @ the moment I'm looking for a block that can map bytes to
symbols.. but how can I learn if gr.chunks_to_symbols can be a
candidate.. and how to use it?
I mean: tutorial 9 is fine for the blocks it covers.. but for the
others?

best regards 
vincenzo


On Mon, 2007-02-19 at 09:59 -0500, Josh Blum wrote:
> Yes, change the boolean value to false for an ifft (sounds like ofdm).
> 
> The best thing describing the gnu radio blocks is the class list
> http://gnuradio.org/doc/doxygen/ 
> 
> The documentation is poor but it will tell you what blocks exist in
> the project. 
> 
> -Josh
> 
> On 2/19/07, Vincenzo Pellegrini <address@hidden> wrote:
>         
>         thanks Josh,
>         it worked fine!
>         
>         vincenzo
>         
>         PS
>         to obtain an ifft instead of a fft,i should use gr.fft_vcc
>         with the boolean argument "forward" set to false, right?
>         
>         PS2
>         is there any other paper available describing the gnuradio
>         blocks, apart from DaweiShen's tutorial 9? 
>         
>         2007/2/18, Josh Blum <address@hidden>:
>                 you should use gr.stream_to_vector(nbytes,
>                 fft_size)-->fft-->gr.vector_to_stream(nbytes,
>                 fft_size)
>                 
>                 nbytes will be 8 for complex data input/output
>                 
>                 -Josh
>                 
>                 Vincenzo Pellegrini wrote:
>                 > hello, 
>                 > first of all thanks to everybody in the list for the
>                 huge amount of
>                 > suggestions about hard-disk reading speeds I was
>                 provided with a few
>                 > days ago. :)
>                 >
>                 > then another question: which is the wisest way to
>                 convert a scalar 
>                 > stream to a vector stream and then back to a scalar
>                 stream within a
>                 > python flow graph.. if there is one, of course!
>                 >
>                 > what I'm trying to do is:
>                 >
>                 >              source_c--->
>                 gr.fft_vcc--->rest_of_the_flow_graph_c
>                 >
>                 > is this reasonable?
>                 >
>                 >
>                 > best regards
>                 > vincenzo
>                 >
>                 >
>                 >
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>                 >
>                 >
>                 
>         
>         
>         
>         -- 
>         Vincenzo Pellegrini 
>         _______________________________________________
>         Discuss-gnuradio mailing list
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>         
>