[USRP-users] [Openbts-discuss] [ANNOUNCE] OpenBTS USRP2 support

Belial b3l14l at gmail.com
Thu Nov 18 14:31:46 EST 2010


Hi Thomas,

Good work! Got OpenBTS working on the USRP2.

B

On 17 November 2010 15:09, Thomas Tsou <ttsou at vt.edu> wrote:

> I'm announcing the availability of USRP2 support with OpenBTS. The
> patch set consists of a new device implementation that uses the UHD
> driver from Ettus Research and allows the use of an external 10MHz
> reference clock. Additional implementation details can be found in the
> comments and commit log.
>
> Download:
>
> git clone git://github.com/ttsou/openbts-uhd.git
>
> git clone http://github.com/ttsou/openbts-uhd.git
>
> http://github.com/ttsou/openbts-uhd/tarball/master
>
> GitHub:
>
> http://github.com/ttsou/openbts-uhd
>
> Build:
>
> USRP2 support requires the UHD driver and firmware. GNU Radio is not
> required.
>
> http://ettus-apps.sourcerepo.com/redmine/ettus/projects/uhd/wiki
>
> ./bootstrap
> ./configure --with-uhd
> make
>
> Without the '--with-uhd' option, the standard USRP1 implementation
> will be built.
>
> Release Notes:
>
> *The USRP2 is clocked at 100MHz and does not output fractional sample
> rates, so only the non-52M Transceiver is available.
>
> *Tested with a single WBX board, which is capable of operation on all
> 4 GSM bands. Other boards should work, but are untested.
>
> *Operation in the upper bands (1800, 1900MHz) requires an external
> reference for reliable operation. This is true to a lesser extent in
> the lower bands as well.
>
> External Reference Clock:
>
> The front panel 10MHz reference input of the USRP2 can be used to
> improve stability of the internal oscillator (~20 ppm). To test
> frequency offset, a modified version of Kalibrate -
> http://thre.at/kalibrate - is available. Information and examples for
> the UHD development branch can be found here.
>
> http://ttsou.github.com/kalibrate-uhd
>
> That's about it. Hopefully, a number of people will find this useful.
> Let me know if you have any questions. Comments and feedback are
> always welcome.
>
>  Thomas
>
>
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