Re: [Discuss-gnuradio] Time syncing between SDRs on different computers

2017-08-16 Thread b . shubenok
No. On Thu, 2017-08-17 at 01:52 +1000, vk4...@tech-software.net wrote: > Are you trying to do MultiLateration using software defined radio ? > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnu

Re: [Discuss-gnuradio] Time syncing between SDRs on different computers

2017-08-16 Thread b . shubenok
Say we need +-10ms accuracy in timestamps. Precision Time Protocol in LAN should sync PC's clocks with enough accuracy. And then using USRP-like methods - set current/start time - get first sample in known time? Of course USB will add undetermined delays but no external GPS required. On Wed, 20

Re: [Discuss-gnuradio] Time syncing between SDRs on different computers

2017-08-16 Thread b . shubenok
What type of hardware? I thought from hardware point of view only precise clock is required and all the other things in firmware. I've naively thought i could modify hackrf firmware to get this feature. On Wed, 2017-08-16 at 17:04 +0200, Sylvain Munaut wrote: > The USRP have dedicated hardware t

Re: [Discuss-gnuradio] Time syncing between SDRs on different computers

2017-08-16 Thread b . shubenok
In two words - receive signal in two points in space and process them accordingly to timestamps. On Wed, 2017-08-16 at 23:40 +1000, vk4...@tech-software.net wrote: > RTL-SDR has no time - it's a dumb A/D with a XTAL > > Same with Hack RF > > What ru trying to do > > A > > -Original Messag

[Discuss-gnuradio] Time syncing between SDRs on different computers

2017-08-16 Thread b . shubenok
Hi, Reading through archive I've found a thread describing how to sync time between two USRPs on different computers using set_time_now and set_start_time methods. Unfortunately I have only RTL-SDR now (and will have HackRF in a few weeks). As far as I can see there are no such methods in RTL-SD