Hello,
I'm trying to sample the 802.11b wireless channels but the USRP2. I'm
currently using revision 10689 of Gnuradio.
I've added code to bbn_80211b_rx.py to connect the gr_probe_signal_f() to
the top block.
To sample the channel, I use gr.probe_signal_f().
Here's the code to connect the block:
self.connect(self.u, self.conv_c2f, self.probe2)
Then I use the gr.probe_signal_f().level() to retrieve the signal in a loop.
data_file = open('data.txt', 'w')
T1 = time.asctime()
while cs_samples < 1000000:
CST = self.tb.probe_channel()
data_file.write(str(CST) + '\n')
cs_samples += 1
data_file.close()
T2 = time.asctime()
def probe_channel(self):
"""
"""
return self.probe2.level()
I was wondering if this is the fastest way to sample the channel from
python. When I compute how long this process takes, it appears that I can
get a sample every 8-9 microseconds, which seems a lot slower than what the
USRP2 is built to do. Am I sampling the channel in an incorrect way?
I'm running this on a machine with a Intel Quad Q9650 @ 3GHz.
Thanks,
Miklos Christine
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