Thank you for your reply, Tom.
With the ‘benchmark_ofdm_tx.py’ and ‘benchmark_ofdm_rx.py’, I receive
the right packets using the command:
$ ./benchmark_ofdm_tx.py -T A -f 2.45G -i 512
$ ./benchmark_ofdm_rx.py -R A -f 2.45G -d 256
But when I send the pre-saved file (which is saved from the
‘benchmark_ofdm_tx.py’), the ‘benchmark_ofdm_rx.py’ does not detect any
packet at the receiver side.
Viewing the received signal with usrp_fft.py, I see the same spectrum,
as from the ‘benchmark_ofdm_tx.py’ sent spectrum, though.
I send it with the same frequency, with the same interpolation rate, and
with the same gain value…
----- Original Message ----
From: Tom R. [email protected]
To: Hoo-chang Shin [email protected]
Cc: [email protected]
Sent: Thursday, April 17, 2008 5:03:14 PM
Subject: Re: [Discuss-gnuradio] Sending pre-saved OFDM file to USRP
Hoo-chang Shin wrote:
Well, I did it like that, it did not work with connecting the file_source direct to USRP.
I thought then it might work when I do the ‘vector thing’ in the middle.
In either case, the receiver USRP does not detect anything.
Have you tried to run usrp_fft.py at the receiver to make sure you see
Also, have you just tried using benchmark_ofdm_tx.py on one side and
benchmark_ofdm_rx.py on another?
There are a lot of parameters to tweak. The amplitude is one important
one (high enough to be seen at the receiver, low enough to avoid
clipping), and the decim/interp values depend on the speed of your
FWIW, just saying the receiver isn’t getting anything isn’t too useful
when asking for help with all of the possible issues.
filename = 'tx_usrp_data.dat'
Why don’t you just do:
Instead of all the vector stuff in the middle?
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