Re: [Discuss-gnuradio] gr-channel: adding ETSI/3GPP channel model taps

On Wed, Dec 30, 2015 at 5:33 AM, Marcus Müller wrote: > I must admit I did that, but feel unsure about how many sines I'd need to > use to simulate spread. > The result I got with 8 and standard doppler spread don't look overly > healthy, and osmocore/gr-gsm has a hard

Re: [Discuss-gnuradio] Projects using the USRP

On 12/30/2015 07:25 AM, w xd wrote: > Hi all, > > Nowadays as we all konw,we can use USRP implement many interesting > applications.Many company and university used our USRP.And the website > www.gnuradio.org show us a good tutorial. > >When I saw a similar instrument WARP and

Re: [Discuss-gnuradio] Projects using the USRP

On 12/30/2015 11:27 AM, Tom Rondeau wrote: But you were focusing your questions specifically on USRP projects. Ettus Research produces and sells USRPs, not the GNU Radio project. We have a very good and close relationship with Ettus Research, and they contribute and support GNU Radio in

[Discuss-gnuradio] Working with Tags

I wrote a block that writes the rx_time tag and another block that reads it. After reading them for a 20 to thirty calls to the work function, it stops getting any. The amount it reads varies from run to run. Any ideas? This code snippet is from the work function my block that writes the tag.

Re: [Discuss-gnuradio] Projects using the USRP

On Wed, Dec 30, 2015 at 7:25 AM, w xd wrote: > Hi all, > > Nowadays as we all konw,we can use USRP implement many interesting > applications.Many company and university used our USRP.And the website > www.gnuradio.org show us a good tutorial. > >When I saw a

Re: [Discuss-gnuradio] Working with Tags

On Wed, Dec 30, 2015 at 11:15 AM, wrote: > I wrote a block that writes the rx_time tag and another block that reads > it. After reading them for a 20 to thirty calls to the work function, it > stops getting any. The amount it reads varies from run to run. Any

Re: [Discuss-gnuradio] problem with USRP N210

Assuming the pins are in good condition, another trouble shooting step would be to swap the daughter cards between the non-working and working units, to determine if it is an issue with the card or the N210. It would not hurt to try swapping the connection cables as well to test them. > On

[Discuss-gnuradio] power amplifiers on TX

Based on the USRP specs (up to 100mW output power), I started looking around for amps that would get me up to a level comparable with other amateur rigs. This is one of the first I found:

Re: [Discuss-gnuradio] power amplifiers on TX

On Wed, Dec 30, 2015 at 3:14 PM, James Humphries wrote: > I'm on Marcus' side with that output power, that's a scary high output. I > start to sweat at 10W... :) > ​Heh, I connected a USRP to a 20KW PA once. Sweating was only one of several things done in

Re: [Discuss-gnuradio] power amplifiers on TX

On 12/30/2015 07:03 PM, Johnathan Corgan wrote: On Wed, Dec 30, 2015 at 3:14 PM, James Humphries > wrote: I'm on Marcus' side with that output power, that's a scary high output. I start to sweat at 10W... :) ​Heh, I

Re: [Discuss-gnuradio] power amplifiers on TX

The amateur limit is 1000 Watts. Personally I ran 800+ Watts on the 2 metre band in the late 1980s for my EME (moonbounce) station. All analog, single long-boom Yagi. I used a 2M downconverter and listened on my 10M receiver as it was way more sensitive than my 2M rig. Over about a year's

Re: [Discuss-gnuradio] power amplifiers on TX

Has anybody tried to implement the WSJT line of signal processing algorithms in GNURadio? In fact it could be quite interesting not just to use Joe K1JT's programs but to play around with his great signal processing ideas. And I guess it could make sense to re-use his algorithms for other

Re: [Discuss-gnuradio] power amplifiers on TX

Hi Daniel, The output power of the USRP is controlled by the TX gain setting. Keep in mind that the output power of the USRP is not calibrated and will vary from device to device. Some may have higher output power than others. Isolation between the transmit and receive sections of the USRP is a

Re: [Discuss-gnuradio] OOT module authors, please update your cmake

On Wed, Dec 30, 2015 at 6:14 AM, Marcus Müller wrote: > That was the general idea, but long impossible at the start, because one > didn't want modules that were "C++ compatible" to older versions of GNU > Radio to fail because these older versions were missing cmake

Re: [Discuss-gnuradio] problem with USRP N210

On 12/30/2015 12:19 PM, abhinav narain wrote: Hi all, I bought 3 USRPs few months ago and have been using two of them intensively. I used the third one today and found out that it is not working. If I tune into the freq = 2MHz (using basic RX/TX card), I see notWorking.png as the output,

Re: [Discuss-gnuradio] Anyone working on ATSC 3.0 enc/dec?

Thanks for response Tom and Ron. I'll take a crack at improving the ATSC decoder efficiency first, just to get my feet wet with GNURadio again. Tom, are there test vectors available for the ATSC 1.0 decoder? Whether or not ATSC 3.0 will ever be a thing... I agree with what Ron has said, and I

Re: [Discuss-gnuradio] Anyone working on ATSC 3.0 enc/dec?

On Wed, Dec 30, 2015 at 4:20 PM, Colby Boyer wrote: > Thanks for response Tom and Ron. > > I'll take a crack at improving the ATSC decoder efficiency first, just > to get my feet wet with GNURadio again. Tom, are there test vectors > available for the ATSC 1.0 decoder? > >

Re: [Discuss-gnuradio] power amplifiers on TX

Hi Daniel, Cannot stress this enough: Don't try to do everything to the max right from the start. Sure, 100mW is a lot less than what can do in the licensed bands, but then again, not coming from an amateur background, 120W right out scare me. Please make sure no more than -15dBm are fed into

Re: [Discuss-gnuradio] power amplifiers on TX

On 30/12/15 22:24, Marcus Müller wrote: > Hi Daniel, > Cannot stress this enough: > Don't try to do everything to the max right from the start. Sure, 100mW > is a lot less than what can do in the licensed bands, but then again, > not coming from an amateur background, 120W right out scare me.

Re: [Discuss-gnuradio] Anyone working on ATSC 3.0 enc/dec?

You can always use the ATSC transmitter in GNU Radio to generate a reference IQ stream. It will have very high SNR, but will work fine for efficiency improvements. gnuradio/gr-dtv/examples/file_atsc_tx.grc Here's a properly formatted Transport Stream that you can use for the TX flow graph.

Re: [Discuss-gnuradio] power amplifiers on TX

In Canada, you can use up to 2250 watts PEP output on SSB. http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01226.html#p10.2 In the US, it's 1500 watts PEP output in any mode. The Kuhne Electronic equipment is excellent stuff. It's essentially commercial equipment that's been re-purposed for

[Discuss-gnuradio] [UHD] Moving to Launchpad PPAs

As we're rolling out the latest UHD release (3.9.2), we're also moving the Ubuntu .debs we provide as binary installers to Launchpad. You can now find the debs, and instructions on how to install them, here: https://launchpad.net/~ettusresearch/+archive/ubuntu/uhd Once you've added the UHD PPA,

Re: [Discuss-gnuradio] power amplifiers on TX

Just to add onto what Ron has said, the limit in the US is 1500 watts, but there are some restrictions per band, and license level. Details here [ http://www.arrl.org/frequency-allocations ] but below are the important tidbits. - "Unless otherwise noted, the maximum power output is 1500 watts

Re: [Discuss-gnuradio] Anyone working on ATSC 3.0 enc/dec?

Ron, do you have any IQ files of ATSC 3 for us to try out? I agree with you that ATSC 3 may be met with resistance. Another big switchover would upset a lot of people, even though this may finally make DTV as dependable as analog. I've described some alternative TV encoding schemes on

Re: [Discuss-gnuradio] Anyone working on ATSC 3.0 enc/dec?

I don't have anything here. Maybe someone in Las Vegas could capture one of the test stations. I'm not exactly sure of the frequencies, but one source says channels 18 and 45. BTW, you put an extra "s" in your link. Should be: http://www.coolsdrstuff.blogspot.com/ Ron On 12/30/2015 05:27

Re: [Discuss-gnuradio] OOT module authors, please update your cmake

That was the general idea, but long impossible at the start, because one didn't want modules that were "C++ compatible" to older versions of GNU Radio to fail because these older versions were missing cmake modules. That's why it might be a good time to revisit that problem, and throw away stuff

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

Hello Kevin, as explained, data isn't stored as "a + bi"; the fact that the two numbers "a" and "b" are interpreted as "real" and "imaginary" of the same complex number shouldn't be stored -- that is implicit. Hence, yes, you just store abababababab..., because the "+" and the "i" is implicit.

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

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi Kevin, the flowgraph expects complex floats. Essentially, other platforms generate the same values. Cartesian coordinates translate to 'a + jb'. GR mostly uses float for a and b. Other data types are also possible and should be easy to convert.

Re: [Discuss-gnuradio] OOT module authors, please update your cmake

Why not to use the cmake modules of gnuradio directly if building OOT's ? If I'm right they are in ${INSTALL_PREFIX}/lib/cmake/gnuradio. And put cmake files only nedded by the oot module into the local oot cmake directory. -- Volker Am 29.12.2015 um 22:43 schrieb Philip Balister: Per this

Re: [Discuss-gnuradio] gr-channel: adding ETSI/3GPP channel model taps

I must admit I did that, but feel unsure about how many sines I'd need to use to simulate spread. The result I got with 8 and standard doppler spread don't look overly healthy, and osmocore/gr-gsm has a hard time understanding noise-free synthetic bcch bursts after going through the fading

[Discuss-gnuradio] Projects using the USRP

Hi all, Nowadays as we all konw,we can use USRP implement many interesting applications.Many company and university used our USRP.And the website www.gnuradio.org show us a good tutorial. When I saw a similar instrument WARP and find they have a project website.And their website