Re: [Discuss-gnuradio] Transmit time synchronization

2014-12-07 Thread Muhammad Shahmeer Omar
Thanks Marcus! Is it possible to synchronize the usrps using individual gpsdo modules for each board or is a central distribution system (like the octoclock) necessary? Hello Muhammad Shahmeer Omar, with neither an external signal or a GPSDO, this is physically impossible. I think with external

Re: [Discuss-gnuradio] Transmit time synchronization

2014-12-07 Thread Marcus Müller
Hello Muhammad Shahmeer Omar, with neither an external signal or a GPSDO, this is physically impossible. I think with external signal you mean the PPS signal; you can of course use a reference signal and build synchronization in software. That is a problem equivalent to synchronization in communi

Re: [Discuss-gnuradio] Transmit time synchronization

2014-10-13 Thread Muhammad Shahmeer Omar
thanks for the input Jeff. I am fairly new to GNURadio so any suggestions on how i can create the said network. My main goal is to implement the multiple relay network and demonstrate its advantages. As i understand it, a differential modulation scheme is my only option if i want to achieve diversi

Re: [Discuss-gnuradio] Transmit time synchronization

2014-10-13 Thread Jeff Long
On 10/13/2014 08:57 AM, Muhammad Shahmeer Omar wrote: sorry disregard previous mail I am trying to implement a multi-relay cooperative network using gnuradio and USRP B200. I cannot figure out how to synchronize the relay transmissions using GNU-Radio (without editing FPGA code or using external

Re: [Discuss-gnuradio] Transmit time synchronization

2014-10-13 Thread Muhammad Shahmeer Omar
sorry disregard previous mail I am trying to implement a multi-relay cooperative network using gnuradio and USRP B200. I cannot figure out how to synchronize the relay transmissions using GNU-Radio (without editing FPGA code or using external clock source). I created an out of tree module derived