Fwd: Video Streaming Issue (most probably at receiving end)

GNU Radio
1

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 R.

2

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

3

Hi Ron,

Thanks for your suggestion. It works for me :slight_smile:

Regards,
Syed Aqeel R.