Domenic,
Whenever you are transferring data from a transmitter to a receiver it
is reasonable to use some sort of framing. If you want a quick test,
use a packet encoder and decoder on your transmitter and receiver,
respectively. This will packetize the data and eliminate the continuous
flow of "garbage" data to your file since the decoder will only output
data from valid packets(w/ header + crc are removed). Bit errors will
manifest themselves as a "short file", since bad packets will be
discarded. If you run the block in verbose mode there may also be
reporting for when packets are discarded.
Set the payload length number in the encoder so you have a known
relationship between the number of bytes missing from the file and the
number of packet errors.
There are numerous ways to improve this simple test, but this is a start
for you. Also, you may want to perform a more fundamental bit error
test. See error rate block.
-J
On 12/09/2011 07:29 AM, Domenic Magazu III wrote:
All,
I was playing around with the DPSK block provided with GNU Radio.
I was able to get my two USRPs talking to each other. I placed a file
sink on the random source generator (set to transmit 10 random binary
digits) and I'm able to see what was actually sent from that file
(command: od -d filename.bin). I was curious how I go about verifying
that the message in my filename.bin is received as transmitted on the
other end? I tried placing a file sink on the DPSK demod block
however because the receiver is constantly pulling in information my
file becomes extremely large and it's difficult to determine where the
message would be amongst the other 'noise'. Does anyone have any
ideas on how to verify my transmitted message is making it to my
receiver?
Thank you
Domenic
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