Re: [Discuss-gnuradio] CDMA in GNURadio
It is possible I think. The current synchronization method only uses the inserted preambles. If you don't change the preamble, it will not affect the synchronization. You may add a Code block into the transmitter diagram, also you need to change some parameters of other blocks. But for the receiver side, it is not as easy as the TX side. Because for the receiver path: ofdm receive --> ofdm demod only two blocks. You have to go deep into them and modify them. Lin 2009/11/21 Brook Lin > > Hi Brian and All, > > Thanks for your last reply about implementing CDMA in GNURadio. I read some > materials on synchronization and also the OFDM examples in GNURadio. Is > that > possible if I add a Code block into the OFDM block diagram to implement > MC-CDMA? > > For the OFDM Transmit path: > frame source -> symbol modulation -> insert preambles -> IFFT -> add cyclic > prefix -> scale -> USRP > > Can I add a code block into this path to get MC-CDMA, like > frame source -> symbol modulation -> code -> insert preambles -> IFFT -> > add > cyclic prefix -> scale -> USRP > > Is this possible for implementing the MC-CDMA. Can I apply the same > synchronization method for OFDM into MC-CMDA? Please advise me. > > Thanks, > Brook > > > Brian Padalino wrote: > > > > On Mon, Oct 26, 2009 at 6:31 PM, Brook Lin wrote: > >> > >> Thanks for your reply, Brian. Is there any examples that I can > reference? > > > > Though I have never read any of the books, these seem to have a lot of > > good information: > > > > Spread Spectrum and CDMA: Principles and Applications # ISBN-13: > > 978-0470091784 > > CDMA: Principles of Spread Spectrum Communication # ISBN-13: > > 978-0201633740 > > > > They both have sections on synchronization, and other details you will > > encounter in a CDMA system. > > > > Good luck! > > > > Brian > > > > > > ___ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > > -- > View this message in context: > http://old.nabble.com/CDMA-in-GNURadio-tp26067547p26447376.html > Sent from the GnuRadio mailing list archive at Nabble.com. > > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] CDMA in GNURadio
Hi Brian and All, Thanks for your last reply about implementing CDMA in GNURadio. I read some materials on synchronization and also the OFDM examples in GNURadio. Is that possible if I add a Code block into the OFDM block diagram to implement MC-CDMA? For the OFDM Transmit path: frame source -> symbol modulation -> insert preambles -> IFFT -> add cyclic prefix -> scale -> USRP Can I add a code block into this path to get MC-CDMA, like frame source -> symbol modulation -> code -> insert preambles -> IFFT -> add cyclic prefix -> scale -> USRP Is this possible for implementing the MC-CDMA. Can I apply the same synchronization method for OFDM into MC-CMDA? Please advise me. Thanks, Brook Brian Padalino wrote: > > On Mon, Oct 26, 2009 at 6:31 PM, Brook Lin wrote: >> >> Thanks for your reply, Brian. Is there any examples that I can reference? > > Though I have never read any of the books, these seem to have a lot of > good information: > > Spread Spectrum and CDMA: Principles and Applications # ISBN-13: > 978-0470091784 > CDMA: Principles of Spread Spectrum Communication # ISBN-13: > 978-0201633740 > > They both have sections on synchronization, and other details you will > encounter in a CDMA system. > > Good luck! > > Brian > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- View this message in context: http://old.nabble.com/CDMA-in-GNURadio-tp26067547p26447376.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] CDMA in GNURadio
On Mon, Oct 26, 2009 at 6:31 PM, Brook Lin wrote: > > Thanks for your reply, Brian. Is there any examples that I can reference? Though I have never read any of the books, these seem to have a lot of good information: Spread Spectrum and CDMA: Principles and Applications # ISBN-13: 978-0470091784 CDMA: Principles of Spread Spectrum Communication # ISBN-13: 978-0201633740 They both have sections on synchronization, and other details you will encounter in a CDMA system. Good luck! Brian ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] CDMA in GNURadio
Thanks for your reply, Brian. Is there any examples that I can reference? Thanks, Brook Brian Padalino wrote: > > On Mon, Oct 26, 2009 at 5:00 PM, Brook Lin wrote: >> >> Hi All, >> >> Does anyone experiment with CDMA via GNU Radio? I am trying to implement >> CDMA via GNURadio. How and where should I start? Thanks in advance. > > Synchronization is probably a good place to start. > > Once you have synchronization, it should all just fall into place. > > Brian > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- View this message in context: http://www.nabble.com/CDMA-in-GNURadio-tp26067547p26068937.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] CDMA in GNURadio
On Mon, Oct 26, 2009 at 5:00 PM, Brook Lin wrote: > > Hi All, > > Does anyone experiment with CDMA via GNU Radio? I am trying to implement > CDMA via GNURadio. How and where should I start? Thanks in advance. Synchronization is probably a good place to start. Once you have synchronization, it should all just fall into place. Brian ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
