Hi Dominik W dniu 18.03.2019 o 10:49, Patscheider, Dominik pisze:
> Hi Piotr Krysik, > > I wanted to achieve an stepped OFDM Radar. > To increase the baseband for the radar, I´m splitting the subcarrier and > transmit them on four center frequencies. > Thus it sends the first symbols on f0 (with an initial phase); afterwards > increasing the center freq to f1 and transmit the next symbols,... > And obviously the initial phase is changing after reconfiguring the > frequency. If phase1, phase5, phase9,... phase2,phase6,... isn´t the same, > it´s not possible to measure any velocity. If you can predict what USRP does with phase differences of the received signal in relation to digital waveform, then you can compensate for it by shifting phases of the received or transmitted signal. > Secondly, the time commands to change the freq I knew but didn´t use right > now. > > I doubt what you are trying to do (keeping knowledge of phase relations after retuning analog RF front-end) can be done on USRPs without timed commands and appropriate daughter-board. -- Best Regards, Piotr Krysik _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
