Re: [Discuss-gnuradio] scalar and vector streams
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 [EMAIL PROTECTED]: 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 ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio -- Vincenzo Pellegrini ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] scalar and vector streams
On 2/19/07, Vincenzo Pellegrini [EMAIL PROTECTED] wrote: PS2 is there any other paper available describing the gnuradio blocks, apart from DaweiShen's tutorial 9? There is a gr-howto-write-a-block module within SVN that shows how to write a block and has an XML document describing what is going on. http://gnuradio.org/trac/browser/gnuradio/trunk/gr-howto-write-a-block Brian ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] scalar and vector streams
On Mon, Feb 19, 2007 at 04:37:18PM +0100, Vincenzo Pellegrini wrote: 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? There are a couple of ways to map bytes to symbols. gr.chunks_to_symbols is the most general. It's usually used with gr.packed_to_unpacked_bb in front of it. That lets you split your byte stream into k-bit chunks for use with gr.chunks_to_symbols. http://gnuradio.org/doc/doxygen/classgr__packed__to__unpacked__bb.html http://gnuradio.org/doc/doxygen/classgr__chunks__to__symbols__bc.html Eric ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
