This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/osmocom-sdr@lists.osmocom.org/.
Jiao Xianjun putaoshu at gmail.comHi, Yes, you are right. The thought is kind of message combination or information fusion, diversity receiving. In this situation, large distance spaced antennas/dongles are required to get enough diversity. But in some application, such as beam forming, direction finding, we want to have antennas/dongles located in a strict relation ship, such as lambda/2 spaced antenna array. In this case we want to detect carrier phases of each channels. On Mon, Aug 26, 2013 at 12:11 AM, Skip Tavakkolian < skip.tavakkolian at gmail.com> wrote: > if you are trying to process ADS-B from two different dongles, running two > dump1090's isn't a problem. i routinely run dump1090 and rtl_acars using > two dongles on the same machine simultaneously. when running two dump1090 > process you must provide the device id for each and make sure both aren't > running their web servers on the same port. > > a more useful setup is to have multiple receivers running on cheap servers > (e.g. raspberry pi) at different locations and then collecting and > correlating the data. having receivers at different locations should yield > a larger coverage area. > > > On Sun, Aug 25, 2013 at 7:13 AM, Jiao Xianjun <putaoshu at gmail.com> wrote: > >> basically you are right. >> But there is signal processing algorithm to track two dongles >> sampling/oscillator error separately and compensate them separately. Thus >> we can get them synchronized finally after signal processing algorithm. >> >> What I need actually is that how to get two streams of sample from two >> dongles. >> >> Actually I notice that in dump1090 it put rtlsdr_read_async in a new >> created background thread, then there is a possibility that I create two >> thread to operate two dongles. But in this method, there should be some >> mechanisms to synchronize two threads. It is complicated. >> >> Anyone has simpler solution? >> >> Thank you. >> >> >> >> On Sun, Aug 25, 2013 at 9:49 PM, Thierry Leconte < >> thierry.leconte at laposte.net> wrote: >> >>> Le 25/08/2013 15:13, Jiao Xianjun a écrit : >>> >>> Hi, >>>> >>>> I want to use multiple rtl-sdr dongles to do some multi-antenna >>>> experiments. >>>> >>>> Is it possible to read IQ samples from multiple rtl-sdr dongles in a >>>> synchronized manner? >>>> >>>> Each dongle have its own clock, so it will never be synchronized at >>> the sample level. >>> >>> >>> >> > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/osmocom-sdr/attachments/20130826/bee1bf06/attachment.htm>