On 04/24/2015 04:27 PM, Pengyu Zhang wrote:
Hi Marcus,
I updated the flow graph (attached) as you suggested. It would be
great if you can help check and let me know if I am wrong...
For upgrading the UHD, I followed this link. UHD is installed
successfully. However, it seems that gnuradio does not call the latest
UHD. Instead, it still calls uhd-host which is combined in the
gnuradio package. Do you have suggestions about how to solve this
problem? Thanks.
Pengyu
On Thu, Apr 23, 2015 at 6:28 PM, Marcus D. Leech <mle...@ripnet.com
<mailto:mle...@ripnet.com>> wrote:
On 04/23/2015 06:23 PM, Pengyu Zhang wrote:
Thanks for the inspiring tips. I did not use the WX GUI scope
for checking the phase offset. Instead, I log the baseband
signal received by each RX antenna. Then, I plot the IQ
constellation of the received baseband for checking their
phase offset.
Can you be a bit more specific when you say the "multi_usrp
object" and the "timed commands"? Are there tutorials that I
can follow step by step for using the two functions you
mentioned? Your comments are very helpful :)
A source/sink block in Gnu Radio uses an underlying multi_usrp
object, so all you have to do is configure your source block for
two channels, with
two devices, and use
addr0=<first-device-ip-addr,addr1=<second-device-ip-addr>
In the device arguments.
Also, recent gr-uhd (3.7.6.1 and newer at least) use timed
commands, so phase-zeroing will happen after a tune automatically,
without you having
to do anything.
The top of the UHD manual is here:
http://files.ettus.com/manual/page_devices.htmlhttp://files.ettus.com/manual/page_devices.html
The Doxygen docs are here:
http://files.ettus.com/manual/page_coding.html
The documents for gr-uhd are part of the Gnu Radio documentation:
http://gnuradio.org/doc/doxygen/classgr_1_1uhd_1_1usrp__source.html
Uninstall all your uhd and gnuradio packages, and re-install, following
the guide here:
http://ettus-apps.sourcerepo.com/redmine/ettus/projects/uhd/wiki/GNU_Radio_UHD
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