[Discuss-gnuradio] voice over digital moduation

Hi I have been working with Gnuradio and USRP N200 for about a month now and about all this time I have never succeeded in transmitting digital voice via USRP. My Proposed approach is like audio source--->CVSD encoder>OFDM mod-->rational resample to 200k--->multiply with signal

Re: [Discuss-gnuradio] Sampling rate of gr-ieee 802.15.4

Hi, > On 9. Nov 2017, at 17:25, Sumit Kumar wrote: > > Hi, > > The 802.15.4 spec says that the channels should be 2 MHz wide with 5 MHz > inter channel spacing. > > Why does gr-ieee 802.15.4 uses a sampling rate of 4MHz instead of 2 MHz ? > > Off course it

[Discuss-gnuradio] Serious bug in tag propagation with non-integer relative rate

There is a major problem with the way tags are propagated in blocks with non-integer relative rate. If the ratio is not a power of two, the numerical accuracy of the floating point will cause the output tags to diverge from the input tags. Consider the fractional resampler. It accumulates the

Re: [Discuss-gnuradio] Cyberspectrum Software Defined Radio Meetup (South Bay, Wed Nov 15th, 7:30PM PT)

Dear all, Please see correct link: https://www.meetup.com/Cyberspectrum/events/244958759/ Thank you to Nick Foster for pointing that out. > On 9 Nov 2017, at 7:31 am, Neel Pandeya wrote: > > Just wanted to note that space at the Cyberspectrum event on Wednesday is >

[Discuss-gnuradio] Sampling rate of gr-ieee 802.15.4

Hi, The 802.15.4 spec says that the channels should be 2 MHz wide with 5 MHz inter channel spacing. Why does gr-ieee 802.15.4 uses a sampling rate of 4MHz instead of 2 MHz ? Off course it works with commercial devices, but I am curious why 4 MHz and not 2 MHz. Regards Sumit

Re: [Discuss-gnuradio] Cyberspectrum Software Defined Radio Meetup (South Bay, Wed Nov 15th, 7:30PM PT)

Just wanted to note that space at the Cyberspectrum event on Wednesday is limited, so you have to RSVP on the Meetup page by Wednesday morning. Thanks a lot! --​Neel Pandeya On 9 November 2017 at 07:12, Balint Seeber wrote: > Dear all, > > We're hosting a special meetup

[Discuss-gnuradio] Cyberspectrum Software Defined Radio Meetup (South Bay, Wed Nov 15th, 7:30PM PT)

Dear all, We're hosting a special meetup next week in the South Bay! It's the same week as the DARPA Bay Area SDR Hackfest: https://darpahackfest.com/bay-area-hackfest Please get in touch if you would like to present. Event details can be found here: https://www.meetup.com/

[Discuss-gnuradio] Setting output buffer to contain one packet

Dear All! I am new to GNU-Radio. I have previously used MATLAB for packet transmission and detection. Here is the problem, I am facing: I have inserted zeros between the packets and transmitting the same packet over and over again. In the packet formation, I have appended two preambles