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Sylvain Munaut 246tnt at gmail.comHi, On Wed, Jul 8, 2020 at 2:19 PM Andi Kita <akita at qmail.qcc.edu> wrote: > What sdr are you using? > > I am trying to use usrp b200 and I was not able to make it work. I have > read the research paper wrote by sylvain but that's for the old code. > Research paper ? I don't think I've ever written any of those ... > Is there anything or any other hardware that I could use? I have a b210 > b200 bladerf x115 and a limesdr full board. I don't want to spend any money > on the cube dongle and usrp1 are not made anymore. > All of the above should work fine. But you need a good RF setup. That means a good directional antenna with the right polarization, a good line of sight to the satellite and preferably external filters and LNA. Here I have so much out-of-band interference from terrestrial signals that without the cavity filter( http://shop.sysmocom.de/products/filter-rf-l-band ) the signals is very bad. I also use a minicircuit LNA with very high linearity ( ~ 200 mA bias current IIRC ). Then you can use the same command line as he did, just remove the `--args airspy` and replace with `--args uhd` for instance for a USRP. (you might have to select the right antenna as well make sure the LED light up where you have your stuff connected). Cheers, Sylvain > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gmr/attachments/20200708/45e084cb/attachment.htm>