Hi Hoang,
aha! Now you're mentioning USRPs, we know what platform type you refer to. What
USRP are you using?
1. as you can see, these instructions belong into the work function of a block
that you write. You'll have to work through the GNU Radio guides on the
gnuradio.org start page, after which you'll be able to design your own
functionality.
2. ?
3. The USRP sink only sends the samples to the device; there is no data in the
sample stream (which I hope you understand, if you've understood Tom's
presentation -- you can query if there are tags for a specific sample range,
but there is no in-band data added).
All in all, it seems you're at the very beginning of understanding GNU Radio,
and you've picked up that stream tags might be a suitable tool for you. They
are, but you need some experience writing basic GNU Radio applications before
you can use them.
Although that is currently work in progress, so far you can not instruct the
USRP sink using stream tags -- the USRP source just adds a rx_time tag on
certain events.
Hope that was a little insightful,
Greetings,
Marcus
On 04/23/2014 06:41 AM, Hoang Ngo Khac wrote:
Thank you Mr. Newman,
I've read (1) GNU Radio Manual on stream tags, (2) slides of Tom Rondeau and
(3) Block Coding Guide about stream tags in
http://gnuradio.org/redmine/projects/gnuradio/wiki/BlocksCodingGuide#Stream-Tags.
They are general and I would like to find some specific example. Anyway, I
have some questions.
1. In (3), they give the example codes for reading/writing stream tags. Where
should these codes be inserted?
3. sob and eob are inserted to the data frame. Does the USRP Sink remove these
redundant data before transmitting?
Best Regards,
Hoang
On Tue, Apr 22, 2014 at 9:27 PM, Tim Newman <tim.new...@gmail.com
<mailto:tim.new...@gmail.com>> wrote:
Try:
http://gnuradio.org/doc/doxygen-3.7/page_stream_tags.html
or
http://gnuradio.org/redmine/attachments/download/252/06-rondeau-stream_tags.pdf
or even
http://bit.ly/1kWXdCl
On Tue, Apr 22, 2014 at 6:29 AM, Hoang Ngo Khac <khachoang1...@gmail.com
<mailto:khachoang1...@gmail.com>> wrote:
Dear List,
I want to make time synchronization for implementation of two-way
relaying network. Each node contain both RX chain and TX chain but they should
not run simultaneously (half-duplex mode). Therefore, the TX chain is on when
it is needed to transmit, and off when the transmission is over. I found that
*stream tags* is the key solution to perform that.
My question is, how should I start to learn about*stream tags*, where
can I find tutorial of *stream tags*?
Thank you so much.
Best Regards,
Hoang
--
Ngo Khac Hoang
Faculty of Electronics and Telecommunications -
University of Engineering and Technology (UET) - Vietnam National
University, Hanoi (VNU)
Vice-president of Student Association of UET
Alternative email: hoangnk...@vnu.edu.vn <mailto:hoangnk...@vnu.edu.vn>
Mobilephone: +84.163.682.7874 <tel:%2B84.163.682.7874>
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--
Ngo Khac Hoang
Faculty of Electronics and Telecommunications -
University of Engineering and Technology (UET) - Vietnam National University,
Hanoi (VNU)
Vice-president of Student Association of UET
Alternative email: hoangnk...@vnu.edu.vn <mailto:hoangnk...@vnu.edu.vn>
Mobilephone: +84.163.682.7874
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