[Discuss-gnuradio] USRP spacing, tx-amplitude and rx-gain

Hello all, Does anyone know a suggested spacing (in meters) for 2 USRPs that communicate with each other when the tx-amplitude is 12000 and the rx-gain is set to 45? Thanks, Dumezie ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://li

Re: [Discuss-gnuradio] Using the dqpsk modulator

Hello all. In reference to this post, how does the signal actually get transmitted through the wireless channel? Does the qpsk block need to be connected to a usrp_sink_c() block? Thanks Dumezie - Original Message - From: "Eric Blossom" To: "karim" Cc: discuss-gnuradio@gnu.org Sen

[Discuss-gnuradio] Transmitting 2 dbpsk signals

Hello everyone, I am trying to transmit simultaneously from two USRPs using 'benchmark_tx.py' to a third one acting as a relay with 'benchmark_rx.py' running. Do the python scripts on the receiver's end such as 'pkt.py' use the access codes to determine which type of modulation scheme the tran

[Discuss-gnuradio] Viewing logged data in .dat files

Hello all, I have a question regarding viewing data that is acquired from log commands which are stored in .dat files. Using "gr.file_sink", it seems that the encoding of the data is in a format that can't be opened using applications in Ubuntu. Does anyone know of a way to see the informatio

[Discuss-gnuradio] rrc_filter output from dbpsk.py file

Hello all, I was analyzing the dbpsk.py file and I was wondering if someone can explain the line: self.connect(self, self.pre_scaler, self.agc, self.rrc_filter, self.receiver, self.diffdec, self.slicer, self.symbol_mapper, self.unpack, self) The "self" term loops back to itself and I wasn't qu

[Discuss-gnuradio] gr.vector_sink_c() script

Hello everyone, Is anyone familiar with how fast the gr.vector_sink_c() script samples incoming data into its sink. I hooked up the sink directly to usrp.source_c() and I was wondering if it receives data at the same rate as the ADC (20M samples/sec). Thanks Dumezie _

[Discuss-gnuradio] Synchronizing two USRPs

Hello everyone. I hope this hasn't been covered or I have overlooked it. Does anyone know of any python scripts in the gnu radio package or any other effective way of synchronizing the clocks of two USRPs. I want to see if I can synchronize multiple modulated packets. Also, does anyone know

[Discuss-gnuradio] Question regarding matched filter outputs

Hello all, Does anyone know where in the GNU Radio code to find the output of the matched filters after a signal is transmitted using a modulation scheme such as BPSK? Thanks, Dumezie ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://