Hi Vingnu, so you mean that on one frequency, you want to have a CW tone, and one the next frequency another etc, but not continuous phase across frequencies. ** Do I understand that correctly? ** I'm confused because you then mention "pulses", and that is a concept that is incompatible with CW radar.
Hardware-wise, most USRPs (which one are you using) support timed commands so that you can tune at a specific sample time. For those that don't, you'll have to use some time buffers, but it's essentially what the example probably does that you cite -- though you're not really telling me which example exactly you're referring to. All in all, please try to make your questions a little more precise, add all the details that are important right from the start. Best regards, Marcus On 14.12.2015 12:05, vingnu GNU wrote: > Hi , > That is nothing but in examples of USRP they have used FMCW for target > simulator with frequency modulated CW here in my case I am going to use > unmodulated CW . > My question was ,is it possible to increment this CW signal source interms > of 60MHz step size and keeping 250usec of dwell time between 60MHz steps > and it should be upto 2GHz and repeating same in next cycle. > ex: first frequency is 1GHz it has to add 60MHz step size and keep 250usec > of dwell time i.e.,after 1.06GHz pulse it has to maintain 250usec dwell > time before next 60MHz pulse . > > regards > vingnu > > On Mon, Dec 14, 2015 at 3:44 PM, Marcus Müller <marcus.muel...@ettus.com> > wrote: > >> Hi Vingnu, >> that's all nice, but what does "continuous wave" _mean_? >> >> Best regards, >> Marcus >> >> On 14.12.2015 10:02, vingnu GNU wrote: >>> Hi marcus, >>> >>> Its like this : generating continuous wave of signal which starts from >> 1GHz >>> and it has to increase in steps of 250usec upto 2GHz.Then I wanted to >> feed >>> it for Radar transmitter.Its like generating Step frequency continuous >> wave >>> signal for radar transmitter. Is it possible from GNU radio and I am >> having >>> USRP E310 right now. >>> >>> regards >>> Vingnu >>> >>> On Mon, Dec 14, 2015 at 2:06 PM, Marcus Müller <marcus.muel...@ettus.com >>> >>> wrote: >>> >>>> Hi Vingnu, >>>> >>>> note that GNU Radio is software that handles sample streams, so yes, any >>>> signal that you can imagine in a given bandwidth can be generated; the >>>> question is whether you can realize that signal in the physical world. >>>> So: >>>> >>>> * do you just want to simulate the signal or really transmit that? >>>> * if you want to transmit that, with which hardware? >>>> * what exactly is "continuous wave" for you here? Continuous for a >> single >>>> frequency step, or continuous across multiple frequencies? >>>> >>>> Best regards, >>>> Marcus >>>> >>>> >>>> On 14.12.2015 05:59, vingnu GNU wrote: >>>> >>>> Hi every one, >>>> >>>> Is this possible to generate step frequency continuous wave for >> frequency >>>> range of 2GHz to 4GHz in GNU radio and step size in range of 250micro >>>> seconds(Dwell time). >>>> >>>> regards >>>> Vingnu >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> Discuss-gnuradio mailing listDiscuss-gnuradio@gnu.orghttps:// >> lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>> >>>> >>>> _______________________________________________ >>>> Discuss-gnuradio mailing list >>>> Discuss-gnuradio@gnu.org >>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>> >>>> >> _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
