The signal level on the transmitter FFT seems very high.
Make sure that the IQ samples sent to the USRP are
not being clipped.
Ron
On 2/3/2014 7:54 AM, Syed Aqeel Raza wrote:
Hi,
Again, I did some more work and the details are as under.
1. I have created a single flowgraph without USRP hardware. For your
reference the file is enclosed with the name of
gmsk_file_transceiver.grc. This work fine and we can see the stream
video output without any difficulty.
2. To continue further I splitted the above mentioned file into
transmitter and receiver side along with the inclusion of USRP source
and sink blocks, respectively. Their flowgraphs are enclosed with the
name of gmsk_tx.grc and gmsk_rx.grc, respectively. The FFT plot shows
that (vdo transmission.png enclosed) transmitter and receiver
handshakes with each other but the signal difference between the
transmitter and the receiver side is 80 dB. I further noticed that
whenever I stopped the transmission the received signal at the
receiver further drops to -120 dB.
I really get stuck in this issue for the last two days. I need your
assistant to resolve this problem as I am a newbie in gnuradio using
USRP platform.
Thanks in advance.
Regards,
Syed Aqeel Raza
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