Hi , I have managed to get two mobile phones communicating between them using the set up (OpenBTS using the UHD driver and USRP2 device) . I have a problem here 1) The communication system losses sync after some time ,even after using a 10 MHz at 300 mV as a result the mobile phones are not in a position to communicate for a longer time . Would be great if you can help me to debug this issue . If there is already a solution for this please send me the link for me . with regards Vintu

Try using two antennas on USRP2 (one on TX/RX and one on RX2). It solved my problem. -- Abhinav On Mon, May 23, 2011 at 5:39 PM, Vintu Alappat <vintujosealappat@gmail.com>wrote: > Hi , > > I have managed to get two mobile phones communicating between them using > the set up (OpenBTS using the UHD driver and USRP2 device) . I have a > problem here > > 1) The communication system losses sync after some time ,even after using a > 10 MHz at 300 mV as a result the mobile phones are not in a position to > communicate for a longer time . > > Would be great if you can help me to debug this issue . If there is already > a solution for this please send me the link for me . > > with regards > Vintu > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > >

On Mon, May 23, 2011 at 5:39 PM, Vintu Alappat <vintujosealappat@gmail.com> wrote: > Hi , > > I have managed to get two mobile phones communicating between them  using > the set up (OpenBTS using the UHD driver and USRP2 device) . I have a > problem here > > 1) The communication system losses sync after some time ,even after using a > 10 MHz at 300 mV as a result the mobile phones are not in a position to > communicate for a longer time . Can you describe in more detail what you mean by losing sync? And how long is a long time? Minutes, hours? I recently pushed a large collection of changes to the repository. Many of these were instigated by work with the E100 and 52MHz transceiver, but apply to the general case as well. I've been running overnight tests lately with calls over 4 hours. Can you try again with the update? git://github.com/ttsou/openbts-uhd.git Also, in the future please direct OpenBTS specific questions to the OpenBTS mailing list. http://lists.sourceforge.net/lists/listinfo/openbts-discuss Thomas