[Discuss-gnuradio] Spectrum issues with wavfile_sink

2010-04-29 Thread Axel Belliard
Hi I’m working on a stanag 4285 transmitter. To validate my work, I’m trying to “record” my transmitter output and play it in Sigmira (a SDR that manage Stanag 4285).As I didn’t get my USRP yet, I’m using a wavfile_sink. See my code bellow. About my code : self.tx=Txpath_ss(self.taille,"s",1) i

Re: [Discuss-gnuradio] Gr-trellis ; convolutional code and, convolutionnal interleaver.

2010-04-15 Thread Axel Belliard
ck for the convolutional > interleaver; it seems pretty straightforward as it consists of a > demultiplexer 1-to-N, multiple delay elements with different delays D(1), > D(2),...,D(N), and an N-to-1 multiplexer. Hey, this can even be > done as a hierarchical block using existing gnuradio

Re: [Discuss-gnuradio] Gr-trellis ; convolutional code and, convolutionnal interleaver.

2010-04-14 Thread Axel Belliard
Hi Thanks for answering my questions. I changed my code, it works now. I will try the random interleaver, to see how it works. But in the end I will need a super control over it. I need something that look like that : http://www.mathworks.com/access/helpdesk/help/toolbox/commblks/ug/fp60504.html (

[Discuss-gnuradio] Gr-trellis ; convolutional code and convolutionnal interleaver.

2010-04-13 Thread Axel Belliard
Gr-trellis ; convolutional code and convolutionnal interleaver. Hi, I'm trying to design an error correction flow graph that would use a convolutional encoder and a convolutional interleaver. I searched in gr-trellis for the appropriate blocks, but I have a bunch of questions about how to use t

Re: [Discuss-gnuradio] How to add c++ modules after gnuradio-3.2.2. binary installation?

2010-03-29 Thread Axel Belliard
Hi I'm interrested by reading the message about adding C++ block into old module, but the link is broken. Can you repost the link or the message? Cordialy ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinf

Re: [Discuss-gnuradio] Question about hier block

2010-03-29 Thread Axel Belliard
Hi, Thanks for taking the time to reply. I changed my code to print the data after the constuctor. But it is still not working. I guess, I 'm doing something else wrong. The changed code : #My top block from gnuradio import gr from Trameur_stana

[Discuss-gnuradio] Question about hier block

2010-03-26 Thread Axel Belliard
Hi I'm trying to make a very simple hier block. ( see the code below). When I execute my top block i get no error, but the data seems to never enter the hier block ( the print-line prints : "()"). What am I doing wrong? my hier block# from gnuradio import gr class Trameur(gr.hier_b

[Discuss-gnuradio] About stream/vector and trellis_encoder

2010-03-19 Thread Axel Belliard
Hi I'm facing 2 problemes : - I'm trying to design a flow graph that creat a transmission frame from a input file. The frame must be like this : [ (sync bytes x80)(data bytes x32)(0x16)(data bytes x32)(0x16)(data bytes x32)(0x16)(data bytes x32) ] My idea is to use vector/stream converters, to di

Re: [Discuss-gnuradio] bpsk Simulation

2010-03-16 Thread Axel Belliard
Salut! I think our issues are related to the synchronizations parameters (Costa's loop and M&M). It seems that they must be chosen very carefully, especially costas_alpha and gain_mu. In order to choose them, I plugged a constellation sink into my modulator using GRC. As the constellation sink is

Re: [Discuss-gnuradio] bpsk Simulation

2010-03-12 Thread Axel Belliard
Thanks for the tips! I was a bit confused with the concept of packet, It is much clearer now. I took your advices. I have, now, a simulation that works, at least for dbpsk. ( dqpsk and d8psk, still give odd output). Just to let the GNUradio community know. My final aim is to realise a hf transce

[Discuss-gnuradio] bpsk Simulation

2010-03-11 Thread Axel Belliard
Hi, I'm new to gnu radio. To get familiar with this project, I'm trying to simulate a dbpsk link. My flow graph look like this : stream of bits => Modulation => frequency up translation => Noisy channel => frequency down translation => Demodulation But, there is something going wrong!! If the in