[Discuss-gnuradio] FOSDEM/SDR Track: Final Schedule Announced

Dear friends and fellow SDR enthusiasts, please note the final SDR track schedule is available through the FOSDEM website: https://fosdem.org/2016/schedule/track/software_defined_radio/ All talks will be recorded and made publically available several weeks after FOSDEM. FOSDEM is in Brussels,

Re: [Discuss-gnuradio] Help decoding Bell 202

En, Ah! Sitting and playing with it greatly helped my understanding of the problem. 1. Your capture seems to have some distortion on it. Fortunately, this doesn't affect FM too bad, but you may want to crank your gain back. 2. Remember, Bell 202 uses 1200 Hz and 2200 Hz. You probably don't want

Re: [Discuss-gnuradio] FOSDEM/SDR Track: Final Schedule Announced

On 28/12/15 23:06, Martin Braun wrote: > Dear friends and fellow SDR enthusiasts, > > please note the final SDR track schedule is available through the FOSDEM > website: https://fosdem.org/2016/schedule/track/software_defined_radio/ > > All talks will be recorded and made publically available

Re: [Discuss-gnuradio] Saving work on Gnu radio live usb stick

On 27.12.2015 01:16, Chris Kuethe wrote: > Doesn't unetbootin format the device as FAT32, which doesn't support > files larger than 4GB... Yep, it does, and yes, this is a common issue. I'm not sure how you can make bigger persistence partitions with other file systems, but I'm sure it's

Re: [Discuss-gnuradio] how to save the usrp samples to a file sink ?

I do encourage you to use GNU Radio + GRC, but gr-uhd ships an app to do that (uhd_rx_cfile). Cheers, Martin On 26.12.2015 22:02, kevin_L wrote: > Dear all, I have a usrp N210, How can I save the usrp samples to a file ? > > > > > -- > View this message in context: >

[Discuss-gnuradio] How to choose a suitable fec method for GMSK Tx and Rx?

Hi all, I want to build a real tx and rx system using gmsk with usrp and gnuradio. How to choose a suitable fec method for my system. Is there any useful demo or tutorial for me? Thanks. Franklin 张苏 （+86）18705191872 17715261872 地址 江苏南京玄武区钟灵街48号94栋1单元602

Re: [Discuss-gnuradio] How to choose a suitable fec method for GMSK Tx and Rx?

Hello Franklin, the choice of appropriate FEC depends *exclusively* on how you want the system to behave, and how you model your transmission, especially with respect to noise. For example, for low-SNR situation, using channel coding actually makes BER worse, so you might even be better off

Re: [Discuss-gnuradio] detecting covert RFID scans

I'll discuss a bit of passive RFID at FOSDEM ... I think there are two parts to the question: detecting RFID measurement attempts on the one hand, and decoding the backscattered signal on the other hand. Detecting RFID is, imho, obvious: because the backscattered signal decays as 1/d^6 for an

Re: [Discuss-gnuradio] Help decoding Bell 202

For anyone working with APRS Stephen (wa8lmf) has put together a downloadable cd image with a lot of test data. Not in quadrature, but that's maybe something Hilbert can take care of. http://wa8lmf.net/TNCtest/ # Get it with wget. $ wget http://www.argentdata.com/files/tnc_test_cd_ver1.0.zip #

Re: [Discuss-gnuradio] gmsk+fec

this is the address of picture http://imgur.com/2EQiY6O sorry to send two e-mails --Ekko ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] ham/amateur getting started

On Sat, Dec 26, 2015 at 7:16 PM, Kevin McQuiggin wrote: > Amateur radio has also historically been a source of innovation and new > technologies. This has been fairly constant throughout the 100+ years of > amateur activity. In many cases, while a specific new technology may

[Discuss-gnuradio] VFO tuning knobs

I realize that SDR provides more than one way to view the spectrum and tune to a frequency, but I can imagine some people feeling comfortable with a tuning knob similar to a traditional radio. There doesn't appear to be any technical reason why a VFO knob could not be part of an SDR application.

Re: [Discuss-gnuradio] Help decoding Bell 202

En Shih, > I tried looking for the data frames > by looking for start/stop bits, the header. I've also tried flipping the > bits. However, it still doesn't look quite right. Packet uses NRZI (non-return to zero inverted) encoding, which means that a 0 is encoded as a change in tone, and a 1 is

Re: [Discuss-gnuradio] VFO tuning knobs

On 12/28/2015 10:33 AM, Daniel Pocock wrote: I realize that SDR provides more than one way to view the spectrum and tune to a frequency, but I can imagine some people feeling comfortable with a tuning knob similar to a traditional radio. There doesn't appear to be any technical reason why a VFO

Re: [Discuss-gnuradio] VFO tuning knobs

Lots of people are building their own with a microcontroller and some kind of rotary encoder. One super easy way is to use the teensy arudino clone (or similar) since they already have libraries for USB HID so you can make your scroll wheel act like a mouse scroll wheel. Rotary encoders exist in

Re: [Discuss-gnuradio] gr-lte recorded files

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi Kevin, There's a variable block 'samp_rate'. It calculates the expected input sample rate for a given FFT size. You need to record your samples at a rate which the N210 supports. Then a rational resampler does the work. That's really it. The docs

Re: [Discuss-gnuradio] VFO tuning knobs

Also, you can instantiate a controlport or xmlrpc server in your flowgraph and then send tuning commands their endpoints. How you generate those tuning commands is up to you... I suppose someone who knows more about GUI programming than I do could come up with a touchscreen app that simulates a

Re: [Discuss-gnuradio] Saving work on Gnu radio live usb stick

On Mon, Dec 28, 2015 at 1:45 PM, Martin Braun wrote: > On 27.12.2015 01:16, Chris Kuethe wrote: > > Doesn't unetbootin format the device as FAT32, which doesn't support > > files larger than 4GB... > > Yep, it does, and yes, this is a common issue. I'm not sure how you

Re: [Discuss-gnuradio] VFO tuning knobs

On 12/28/2015 01:25 PM, Tom Rondeau wrote: On Mon, Dec 28, 2015 at 1:16 PM, Chris Kuethe > wrote: Also, you can instantiate a controlport or xmlrpc server in your flowgraph and then send tuning commands their endpoints. How

Re: [Discuss-gnuradio] VFO tuning knobs

On Mon, Dec 28, 2015 at 1:16 PM, Chris Kuethe wrote: > Also, you can instantiate a controlport or xmlrpc server in your > flowgraph and then send tuning commands their endpoints. > > How you generate those tuning commands is up to you... I suppose > someone who knows more

Re: [Discuss-gnuradio] How to choose a suitable fec method for GMSK Tx and Rx?

If you want to see a pure C/C++ implementation of a GFSK (similar to GMSK) tx and rx, you may refer to: https://github.com/JiaoXianjun/BTLE On Tue, Dec 29, 2015 at 9:55 AM, 苏张 wrote: > Hi all, > > I want to build a real tx and rx system using gmsk with usrp and

Re: [Discuss-gnuradio] gmsk+fec

Ekko, Add a Tag debug block after your packet encoder and see if there are any tags coming out of it. I think packet encoder is not passing your tag. If that is the case, move your stream to tagged stream block after the packet encoder just before the FEC extended tagged encoder. Hope it helps.