Re: [Discuss-gnuradio] Implementing timed transmission: UHD API or Stream Tags?

2016-07-14 Thread Usman Haider
Hi Martin, > > Appreciate your reply to my questions. I agree that I cannot do better > than a clock cycle, so that is settled. Let us say that I use GPSDO for my > reference and I wish to transmit at GPS time t. Is it possible to control > the transmit time to within (t plus/minus 1 clock cycle)?

Re: [Discuss-gnuradio] Implementing timed transmission: UHD API or Stream Tags?

2016-07-14 Thread Lakshay Narula
Thanks Usman, That was some really useful information. So if this is the case then I should be able to calibrate out both the DSP and analog delay (analog delays are supposed to be smaller and stable). Also, a DAC delay must also be included in those calculations. Best, Lakshay. Hi Martin, > > A

Re: [Discuss-gnuradio] Bug in fmdet_cf_impl.cc

2016-07-14 Thread Ben Hilburn
Hi Eugene - Wow, yeah - that one is pretty egregious. I see you actually first reported the bug in *February of 2014*. Sorry it fell through the cracks! I have created a PR with this fix and submitted it against `maint`. Cheers, Ben On Tue, Jul 12, 2016 at 8:53 PM, Eugene Grayver wrote: > The

[Discuss-gnuradio] [SOCIS] SCF Update

2016-07-14 Thread Christopher Richardson
Hi Everyone, Just including a link to what I've been working on recently: https://signalsintelligence.wordpress.com/2016/07/09/interfacing-with-tfmodel/ cheers Chris ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailm

Re: [Discuss-gnuradio] Implementing timed transmission: UHD API or Stream Tags?

2016-07-14 Thread Martin Braun
Yes, you can time down to the clock cycle. The time it takes for a signal to propagate to the antenna after it is released depends on the interpolation rate and the hardware, but it doesn't vary a lot (assuming everything else constant, such as temperature). You can calibrate that out quite well --

Re: [Discuss-gnuradio] couple of questions

2016-07-14 Thread Darin Decker
Sure enough Bastian, thank you > On Jul 9, 2016, at 2:09 AM, Bastian Bloessl wrote: > > Hi, > > On 07/09/2016 02:51 AM, Darin Decker wrote: >> >> Interesting thing is that Sources was there before but isn't now as you >> state; however, if I search for osmo source, it is there to be used. > >

[Discuss-gnuradio] Good CDMA codes

2016-07-14 Thread Henry Barton
I’m designing a CDMA system with a spreading factor of 20. I recently wrote an app to go through all the binary permutations up to 2^20 and report which ones have an equal number of 0’s and 1’s, or at least differ by only one. It came up with so many “hits” that I have to wonder if they're reall