Re: [Discuss-gnuradio] howto create multiple carriers with usrp
A multiply constant block is needed to reduce the level for actual transmission with an SDR. It should be set to 1 / (number of active carriers). Also an odd number of carriers produces a cleaner spectrum. Updated flow graph attached. Ron On 3/26/19 04:55, Ron Economos wrote: Just use an inverse FFT. Flow graph attached. In the vector source, just zero out carriers you don't want. Ron On 3/26/19 00:45, on4...@telenet.be wrote: Hi group, I want to create 10 or 20 or 30 carriers all spaced evenly at 250Khz apart. How can i do this, any tips? thanks ___ 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 carriers.grc Description: application/gnuradio-grc ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] howto create multiple carriers with usrp
Just use an inverse FFT. Flow graph attached. In the vector source, just zero out carriers you don't want. Ron On 3/26/19 00:45, on4...@telenet.be wrote: Hi group, I want to create 10 or 20 or 30 carriers all spaced evenly at 250Khz apart. How can i do this, any tips? thanks ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio carriers.grc Description: application/gnuradio-grc ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] howto create multiple carriers with usrp
Use a polyphase filterbank. It's not runtime reconfigurable in GR, but if you create the correct spacing with the max you'll ever need then you can always optionally direct the output of some to a null sink. Hope this is useful! - MLD On Tue, Mar 26, 2019, at 3:46 AM, on4...@telenet.be wrote: > Hi group, > > I want to create 10 or 20 or 30 carriers all spaced evenly at 250Khz apart. > How can i do this, any tips? > > thanks > ___ > 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
[Discuss-gnuradio] howto create multiple carriers with usrp
Hi group, I want to create 10 or 20 or 30 carriers all spaced evenly at 250Khz apart. How can i do this, any tips? thanks ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
