Hello all,
I will give you more details about my problem because someone has asked
me for them(thank you):
The OFDM system we are using is which is defined in this link:
http://gnuradio.org/trac/browser/gnuradio/branches/developers/n4hy/ofdm/gnuradio-core/src/python/gnuradio/blksimpl?rev=5763
The file ofdm.py is the transmitter and the other ones are receiver and
synchronization modules. When I run ofdm.py which I’ve copied into the
folder I told you on the other topic(the first one), appear some errors.
If I type ./ofdm.py the output is:
./ofdm.py: line 23: import: order not found
from: can’t read /var/mail/numpy
from: can’t read /var/mail/gnuradio
./ofdm.py: line 26: import: order not found
from: can’t read /var/mail/gnuradio.blksimpl.ofdm_receiver
./ofdm.py: line 35: sintax error near token no hoped (' ./ofdm.py: line 35: class ofdm_mod(gr.hier_block):’
I’m using Linux Ubuntu 7.04 and gnuradio 3.1.1.
Thank you all for help us!!
On Wed, Feb 27, 2008 at 11:43 AM, Jose Emilio Gervilla R.
[email protected] wrote:
The file ofdm.py is the transmitter and the other ones are receiver and
./ofdm.py: line 35: `class ofdm_mod(gr.hier_block):’
I don’t think those files are for running from the shell.
For OFDM examples, why not check out:
http://gnuradio.org/trac/browser/gnuradio/trunk/gnuradio-examples/python/ofdm?rev=5763
They should be installed on your local system here:
/usr/local/share/gnuradio/examples/ofdm
You might have better success checking out those, especially the
benchmark scripts.
Brian
On Wed, Feb 27, 2008 at 05:43:18PM +0100, Jose Emilio Gervilla R.
wrote:
Hello all,
I will give you more details about my problem because someone has asked me for them(thank you):
The OFDM system we are using is which is defined in this link:
http://gnuradio.org/trac/browser/gnuradio/branches/developers/n4hy/ofdm/gnuradio-core/src/python/gnuradio/blksimpl?rev=5763
Jose, that stuff is ancient. The stuff in the trunk is much more
up-to-date.
Eric
Jose Emilio Gervilla R. wrote:
and synchronization modules. When I run ofdm.py which I’ve copied into
I’m using Linux Ubuntu 7.04 and gnuradio 3.1.1.
Thank you all for help us!!
Jose,
You are not quite using those blocks correctly, anyway. They depend on
their location to be properly imported. All of the core OFDM blocks are
locaked in blks2impl and can be imported using gnuradio.blks2:
from gnuradio import gr, blks2
Then you can access blks2.ofdm or blks2.ofdm_receiver.
If you are working on a new type of synchronization, you’ll want to
place that in blks2impl. You’ll find there are already four different
types already there: ofdm_sync_pn, ofdm_sync_pnac, ofdm_sync_ml, and
ofdm_sync_fixed. The fixed version simply knows how long to delay the
triggering and assumes no frequency offset and was used just to test the
mod/demod blocks. Of the rest, only the PN sequence synchronization
currently works (and may be the only one that will ever work of these).
I think a bit of reorganization is due for the sync blocks, anyway. They
do 1 or 2 steps too many. I would like to remove the ofdm_sampler from
it, put that block in ofdm_receiver and output two streams from each
sync: a timing trigger for when the preamble is detected and the fine
frequency derotated OFDM symbol. The idea being a general interface for
different OFDM sync blocks like yours that we could fit in.
Make sense?
Tom