[Discuss-gnuradio] the problem with the uhd_fft.py modified

2011-09-13 Thread guojun chang
Hi,everyone
 I 'd like to watch the OFDM constellation,so I modified the
uhd_fft.py, I added some code as follows:

demod = blks2.ofdm_demod(options)
stream = gr.vector_to_stream(8,200)
self.connect(self.u, (demod.ofdm_recv,0),stream,self.scope)
self.connect((demod.ofdm_recv,1),gr.null_sink(1))

when modified the code, the graph stopped after running one or two
seconds, it looks like not receive any data.
 Could you tell me where is wrong? I appreciate any help, thanks in advance.


BR
guojun

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Re: [Discuss-gnuradio] How to display constellation in gnuradio

2011-09-05 Thread guojun chang
I have found it, but i'd like to add FFT before sopesink2 of wxgui,
there a error in it. the error info is itemsize mismatch:gr uhd usrp
source(1):0 using 8,fft_vcc_fftw(14):0 using 4096,how to have their
itemsizi matched?

2011/9/5 Josh Blum j...@ettus.com:


 On 09/04/2011 04:42 AM, guojun chang wrote:
 How to display constellation in gnuradio? I know that uhd_fft.py can
 show a window, but there is not anything what i need. I appreciate any
 help, thanks a lot in advance.


 The both the qtgui sink and wxgui scope sink has an XY mode to plot
 complex input.

 -josh

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[Discuss-gnuradio] How to display constellation in gnuradio

2011-09-04 Thread guojun chang
How to display constellation in gnuradio? I know that uhd_fft.py can
show a window, but there is not anything what i need. I appreciate any
help, thanks a lot in advance.

BR
guojun

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