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Re: [Discuss-gnuradio] [discuss-gnuradio] The Gnu radio's stream mode
From: |
Nowlan, Sean |
Subject: |
Re: [Discuss-gnuradio] [discuss-gnuradio] The Gnu radio's stream mode |
Date: |
Thu, 22 Mar 2012 14:53:31 +0000 |
With stream tags you can precisely control timing of TX and RX, which should
allow you to do packet transmission.
Brief intro:
http://gnuradio.org/redmine/projects/gnuradio/wiki/BlocksCodingGuide#Stream-Tags
Also look at these examples (copied from
http://www.ruby-forum.com/topic/3832986) :
A description of tags here:
http://gnuradio.org/cgit/gnuradio.git/tree/gr-uhd/include/gr_uhd_usrp_sink.h#n59
http://gnuradio.org/cgit/gnuradio.git/tree/gr-uhd/include/gr_uhd_usrp_source.h#n59
A tags demonstration:
http://gnuradio.org/cgit/gnuradio.git/tree/gr-uhd/examples/tags_demo.cc
Sean
-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Pan, Luyuan
Sent: Thursday, March 22, 2012 5:09 AM
To: address@hidden
Subject: [Discuss-gnuradio] [discuss-gnuradio] The Gnu radio's stream mode
Hello everybody,
Many people say the Gnuradio operates in stream mode with the flowgraph,
but I am not clear about the stream mode, for it is too abstract. Does anyone
have a better way to understand it or interpret it in plain words? And one
thesis says,'Gnu Radio is not designed to work in packet mode, rather the
scheduler is designed to operate on continuous data stream', so if I want to
get precise-time control of the data packet, what should I do? (What I recently
do is to switch the TX/RX using one antenna, I just make two top_blocks and
switch them, the problem is there is too much delay. If I want to send 5
seconds, I also need to wait to 1.5 sec to make sure it successfully sent all
the data)
Can I so lucky to reference someone's information or get a hand from you?
Thanks very much !
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