[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] Spectrum_sense of a smaller banwidth
From: |
Adi85 |
Subject: |
Re: [Discuss-gnuradio] Spectrum_sense of a smaller banwidth |
Date: |
Mon, 9 Mar 2009 09:22:58 -0700 (PDT) |
Ok..here is my code and my error message:
class topBlock(gr.top_block):
def __init__(self):
gr.top_block.__init__(self)
fftsize = 4096
udecim = 256
mywin = window.blackmanharris(fftsize)
fft = gr.fft_vcc(fftsize, True, mywin)
signal = usrp.source_c(0,udecim) # signal from Basic RX,
decimation=256
throttle = gr.throttle(gr.sizeof_gr_complex, 100000) #
throttle=100k
v = gr.stream_to_vector(gr.sizeof_gr_complex, fftsize) # complex
in, 4096 length
v_sink = gr.vector_sink_c()
self.connect(signal, throttle, v, fft, v_sink)
# Do stuff with v_sink.data()
if __name__ == "__main__":
print "Initilizing.."
tb = topBlock()
print "Flowgraph start.."
tb.start()
print "Exiting.."
Error message:
Initilizing..
Traceback (most recent call last):
File "u0.py", line 30, in <module>
tb = topBlock()
File "u0.py", line 24, in __init__
self.connect(signal, throttle, v, fft, v_sink)
File "/usr/local/lib/python2.5/site-packages/gnuradio/gr/top_block.py",
line 70, in connect
self._connect(points[i-1], points[i])
File "/usr/local/lib/python2.5/site-packages/gnuradio/gr/top_block.py",
line 76, in _connect
dst_block.basic_block(), dst_port)
File
"/usr/local/lib/python2.5/site-packages/gnuradio/gr/gnuradio_swig_py_runtime.py",
line 1469, in connect
return _gnuradio_swig_py_runtime.gr_top_block_sptr_connect(*args)
ValueError: itemsize mismatch: fft_vcc_fftw(1):0 using 32768,
vector_sink_c(5):0 using 8
To be more specific I have a complex fft connected to a complex vectors sink
so I do not know why it apears Item size mismatch!
Thank you
--
View this message in context:
http://www.nabble.com/Spectrum_sense-of-a-smaller-banwidth-tp22413464p22413681.html
Sent from the GnuRadio mailing list archive at Nabble.com.