Please ask these questions on the mailing list. On 02/03/2014 12:44 PM, Syed Aqeel Raza wrote: > Hi Martin, > > 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.
This does *not* mean your flowgraphs are working. I haven't been able to check them, but there's many things that can go wrong over the air which won't in a simulation. > 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. You are working with relative power levels here, so the dB values don't mean that much. Martin _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
