Re: [Discuss-gnuradio] running OFDM on USRP2
Ian, Yes, we use usrp2_fft.py to find and set the property rx_gain first. Bin On Wed, Mar 31, 2010 at 1:11 AM, Ian Holland ian.holl...@rlmgroup.com.auwrote: I have been inactive on this for some time due to other issues with my USRP2s. However, I have been able to look into this again now, with Veljko's modified code. I run as root, and also had the realtime scheduling enabled, however on the receive side I see nothing until the transmitter stops transmitting, at which time I see timeout. This seems to be the same problem that Bin had (except without the realtime scheduling issue). Bin, did you end up resolving this issue? Cheers Ian. -Original Message- From: discuss-gnuradio-bounces+ian.holland=rlmgroup.com...@gnu.org [mailto:discuss-gnuradio-bounces+ian.hollanddiscuss-gnuradio-bounces%2Bian.holland =rlmgroup.com...@gnu.org] On Behalf Of Tom Rondeau Sent: Thursday, 4 February 2010 11:56 PM To: bin zan Cc: discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] running OFDM on USRP2 On Wed, Feb 3, 2010 at 1:55 PM, bin zan zanbin2...@gmail.com wrote: Hi Tom, In our case, even with script from Veljko, the OFDM receiver doesn't show any thing. And we always see usrp2: failed to enable realtime scheduling. Do you think that will cause problem? Thanks, Bin No, that message is just telling you that you don't have permissions to run it at the highest priority. It means you won't be able to run as fast, but that shouldn't be the cause of your problems. Tom ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
RE: [Discuss-gnuradio] running OFDM on USRP2
I have been inactive on this for some time due to other issues with my USRP2s. However, I have been able to look into this again now, with Veljko's modified code. I run as root, and also had the realtime scheduling enabled, however on the receive side I see nothing until the transmitter stops transmitting, at which time I see timeout. This seems to be the same problem that Bin had (except without the realtime scheduling issue). Bin, did you end up resolving this issue? Cheers Ian. -Original Message- From: discuss-gnuradio-bounces+ian.holland=rlmgroup.com...@gnu.org [mailto:discuss-gnuradio-bounces+ian.holland=rlmgroup.com...@gnu.org] On Behalf Of Tom Rondeau Sent: Thursday, 4 February 2010 11:56 PM To: bin zan Cc: discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] running OFDM on USRP2 On Wed, Feb 3, 2010 at 1:55 PM, bin zan zanbin2...@gmail.com wrote: Hi Tom, In our case, even with script from Veljko, the OFDM receiver doesn't show any thing. And we always see usrp2: failed to enable realtime scheduling. Do you think that will cause problem? Thanks, Bin No, that message is just telling you that you don't have permissions to run it at the highest priority. It means you won't be able to run as fast, but that shouldn't be the cause of your problems. Tom ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] running OFDM on USRP2
On Wed, Feb 3, 2010 at 1:55 PM, bin zan zanbin2...@gmail.com wrote: Hi Tom, In our case, even with script from Veljko, the OFDM receiver doesn't show any thing. And we always see usrp2: failed to enable realtime scheduling. Do you think that will cause problem? Thanks, Bin No, that message is just telling you that you don't have permissions to run it at the highest priority. It means you won't be able to run as fast, but that shouldn't be the cause of your problems. Tom ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] running OFDM on USRP2
On Thu, Feb 04, 2010 at 07:25:47AM -0600, Tom Rondeau wrote: On Wed, Feb 3, 2010 at 1:55 PM, bin zan zanbin2...@gmail.com wrote: Hi Tom, In our case, even with script from Veljko, the OFDM receiver doesn't show any thing. And we always see usrp2: failed to enable realtime scheduling. Do you think that will cause problem? Thanks, Bin No, that message is just telling you that you don't have permissions to run it at the highest priority. It means you won't be able to run as fast, but that shouldn't be the cause of your problems. Tom To enable real-time scheduling (highly recommended), do this: Ensure that you are in the usrp group, and then add this line to the end of /etc/security/limits.conf: @usrp- rtprio 50 Log out, then back in, and the message should go away. Eric ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] running OFDM on USRP2
On Tue, Feb 2, 2010 at 4:34 PM, Anu000 anupama.puro...@gmail.com wrote: Hi, We did try the below command on two USRP2s coneected via a SMA Cable (Tx-Rx) with freq = 25M however it returned the following error on both sides At Rx side it shows like the below - [r...@gnuradio1 ofdm]# ./benchmark_ofdm_rx.py -f 25M -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 usrp: failed to find usrp[0] Traceback (most recent call last): File ./benchmark_ofdm_rx.py, line 210, in module main() File ./benchmark_ofdm_rx.py, line 199, in main tb = my_top_block(rx_callback, options) File ./benchmark_ofdm_rx.py, line 51, in __init__ self._setup_usrp_source() File ./benchmark_ofdm_rx.py, line 70, in _setup_usrp_source fusb_nblocks=self._fusb_nblocks) File /usr/lib/python2.6/site-packages/gnuradio/usrp/usrp_swig.py, line 1699, in source_c return _usrp_swig.source_c(*args, **kwargs) RuntimeError: can't open usrp At Tx side - r...@gnu2 ofdm]# ./benchmark_ofdm_tx.py -f 25M -i 512 --fft-length=64 --occupied-tones=32 --cp-length=4 usrp: failed to find usrp[0] Traceback (most recent call last): File ./benchmark_ofdm_tx.py, line 217, in module main() File ./benchmark_ofdm_tx.py, line 190, in main tb = my_top_block(options) File ./benchmark_ofdm_tx.py, line 51, in __init__ self._setup_usrp_sink() File ./benchmark_ofdm_tx.py, line 66, in _setup_usrp_sink fusb_nblocks=self._fusb_nblocks) File /usr/local/lib/python2.5/site-packages/gnuradio/usrp/usrp_swig.py, line 2415, in sink_c return _usrp_swig.sink_c(*args, **kwargs) RuntimeError: can't open usrp May we request somebody to support us at the earliest to resolve the above issue with either software or hardware . Thanks again, Anupama This is because you do not have the right permissions set to talk to the USRP2 as a non-root user. See the USRP2 FAQs on the GNU Radio web page for how to fix this. Tom ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] running OFDM on USRP2
On Wed, Jan 27, 2010 at 11:21 AM, bin zan zanbin2...@gmail.com wrote: Hello, I was trying to run following OFDM command on USRP2, however, I got a bunch of Stime out at the receiver side. ./benchmark_ofdm_tx.py -f 2.4G -i 512 --fft-length=64 --occupied-tones=32 --cp-length=4 ./benchmark_ofdm_rx.py -f 2.4G -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 I wonder if there is any one successfully running OFDM on USRP2, what are the command parameters you are using and if there is any modification in the code, can you let me know. Thanks, Bin The 'S' appear because you're missing packets. Using the interpolation and decimation rates you specified shouldn't be taxi/ng your CPU, which is a common cause of these problems. Are you running the USRP2 through a switch or is it directly connected? The time out occurs when the receiver sees the preamble symbol of the OFDM stream but nothing else. So what is probably happening is that you get some of the symbols through, including the preamble symbol, but you're dropping other packets (causing the Ses), which will trigger the time out message. Tom ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] running OFDM on USRP2
Hi Tom , Thanks , we did try the updated script from Veljko . It works though we have missing packets after a while ( as suggested in the forum we would play with the interpolation and decimation ) though the 2 USRP2s are directly connected . We are still probing into the permissions issue as indicated though we ran with root permissions ( may be not in totality) , would keep posted on the later if we find something on the same Thanks again , /Regards On Wed, Feb 3, 2010 at 8:17 AM, Tom Rondeau trondeau1...@gmail.com wrote: On Tue, Feb 2, 2010 at 4:34 PM, Anu000 anupama.puro...@gmail.com wrote: Hi, We did try the below command on two USRP2s coneected via a SMA Cable (Tx-Rx) with freq = 25M however it returned the following error on both sides At Rx side it shows like the below - [r...@gnuradio1 ofdm]# ./benchmark_ofdm_rx.py -f 25M -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 usrp: failed to find usrp[0] Traceback (most recent call last): File ./benchmark_ofdm_rx.py, line 210, in module main() File ./benchmark_ofdm_rx.py, line 199, in main tb = my_top_block(rx_callback, options) File ./benchmark_ofdm_rx.py, line 51, in __init__ self._setup_usrp_source() File ./benchmark_ofdm_rx.py, line 70, in _setup_usrp_source fusb_nblocks=self._fusb_nblocks) File /usr/lib/python2.6/site-packages/gnuradio/usrp/usrp_swig.py, line 1699, in source_c return _usrp_swig.source_c(*args, **kwargs) RuntimeError: can't open usrp At Tx side - r...@gnu2 ofdm]# ./benchmark_ofdm_tx.py -f 25M -i 512 --fft-length=64 --occupied-tones=32 --cp-length=4 usrp: failed to find usrp[0] Traceback (most recent call last): File ./benchmark_ofdm_tx.py, line 217, in module main() File ./benchmark_ofdm_tx.py, line 190, in main tb = my_top_block(options) File ./benchmark_ofdm_tx.py, line 51, in __init__ self._setup_usrp_sink() File ./benchmark_ofdm_tx.py, line 66, in _setup_usrp_sink fusb_nblocks=self._fusb_nblocks) File /usr/local/lib/python2.5/site-packages/gnuradio/usrp/usrp_swig.py, line 2415, in sink_c return _usrp_swig.sink_c(*args, **kwargs) RuntimeError: can't open usrp May we request somebody to support us at the earliest to resolve the above issue with either software or hardware . Thanks again, Anupama This is because you do not have the right permissions set to talk to the USRP2 as a non-root user. See the USRP2 FAQs on the GNU Radio web page for how to fix this. Tom -- Thanks Regards, Anupama Purohit 972 697 8183 (M) ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] running OFDM on USRP2
Hi Tom, In our case, even with script from Veljko, the OFDM receiver doesn't show any thing. And we always see usrp2: failed to enable realtime scheduling. Do you think that will cause problem? Thanks, Bin On Wed, Feb 3, 2010 at 12:57 PM, Anupama Purohit anupama.puro...@gmail.comwrote: Hi Tom , Thanks , we did try the updated script from Veljko . It works though we have missing packets after a while ( as suggested in the forum we would play with the interpolation and decimation ) though the 2 USRP2s are directly connected . We are still probing into the permissions issue as indicated though we ran with root permissions ( may be not in totality) , would keep posted on the later if we find something on the same Thanks again , /Regards On Wed, Feb 3, 2010 at 8:17 AM, Tom Rondeau trondeau1...@gmail.comwrote: On Tue, Feb 2, 2010 at 4:34 PM, Anu000 anupama.puro...@gmail.com wrote: Hi, We did try the below command on two USRP2s coneected via a SMA Cable (Tx-Rx) with freq = 25M however it returned the following error on both sides At Rx side it shows like the below - [r...@gnuradio1 ofdm]# ./benchmark_ofdm_rx.py -f 25M -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 usrp: failed to find usrp[0] Traceback (most recent call last): File ./benchmark_ofdm_rx.py, line 210, in module main() File ./benchmark_ofdm_rx.py, line 199, in main tb = my_top_block(rx_callback, options) File ./benchmark_ofdm_rx.py, line 51, in __init__ self._setup_usrp_source() File ./benchmark_ofdm_rx.py, line 70, in _setup_usrp_source fusb_nblocks=self._fusb_nblocks) File /usr/lib/python2.6/site-packages/gnuradio/usrp/usrp_swig.py, line 1699, in source_c return _usrp_swig.source_c(*args, **kwargs) RuntimeError: can't open usrp At Tx side - r...@gnu2 ofdm]# ./benchmark_ofdm_tx.py -f 25M -i 512 --fft-length=64 --occupied-tones=32 --cp-length=4 usrp: failed to find usrp[0] Traceback (most recent call last): File ./benchmark_ofdm_tx.py, line 217, in module main() File ./benchmark_ofdm_tx.py, line 190, in main tb = my_top_block(options) File ./benchmark_ofdm_tx.py, line 51, in __init__ self._setup_usrp_sink() File ./benchmark_ofdm_tx.py, line 66, in _setup_usrp_sink fusb_nblocks=self._fusb_nblocks) File /usr/local/lib/python2.5/site-packages/gnuradio/usrp/usrp_swig.py, line 2415, in sink_c return _usrp_swig.sink_c(*args, **kwargs) RuntimeError: can't open usrp May we request somebody to support us at the earliest to resolve the above issue with either software or hardware . Thanks again, Anupama This is because you do not have the right permissions set to talk to the USRP2 as a non-root user. See the USRP2 FAQs on the GNU Radio web page for how to fix this. Tom -- Thanks Regards, Anupama Purohit 972 697 8183 (M) ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] running OFDM on USRP2
Hi, We did try the below command on two USRP2s coneected via a SMA Cable (Tx-Rx) with freq = 25M however it returned the following error on both sides At Rx side it shows like the below - [r...@gnuradio1 ofdm]# ./benchmark_ofdm_rx.py -f 25M -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 usrp: failed to find usrp[0] Traceback (most recent call last): File ./benchmark_ofdm_rx.py, line 210, in module main() File ./benchmark_ofdm_rx.py, line 199, in main tb = my_top_block(rx_callback, options) File ./benchmark_ofdm_rx.py, line 51, in __init__ self._setup_usrp_source() File ./benchmark_ofdm_rx.py, line 70, in _setup_usrp_source fusb_nblocks=self._fusb_nblocks) File /usr/lib/python2.6/site-packages/gnuradio/usrp/usrp_swig.py, line 1699, in source_c return _usrp_swig.source_c(*args, **kwargs) RuntimeError: can't open usrp At Tx side - r...@gnu2 ofdm]# ./benchmark_ofdm_tx.py -f 25M -i 512 --fft-length=64 --occupied-tones=32 --cp-length=4 usrp: failed to find usrp[0] Traceback (most recent call last): File ./benchmark_ofdm_tx.py, line 217, in module main() File ./benchmark_ofdm_tx.py, line 190, in main tb = my_top_block(options) File ./benchmark_ofdm_tx.py, line 51, in __init__ self._setup_usrp_sink() File ./benchmark_ofdm_tx.py, line 66, in _setup_usrp_sink fusb_nblocks=self._fusb_nblocks) File /usr/local/lib/python2.5/site-packages/gnuradio/usrp/usrp_swig.py, line 2415, in sink_c return _usrp_swig.sink_c(*args, **kwargs) RuntimeError: can't open usrp May we request somebody to support us at the earliest to resolve the above issue with either software or hardware . Thanks again, Anupama bin zan wrote: Hello, I was trying to run following OFDM command on USRP2, however, I got a bunch of Stime out at the receiver side. ./benchmark_ofdm_tx.py -f 2.4G -i 512 --fft-length=64 --occupied-tones=32 --cp-length=4 ./benchmark_ofdm_rx.py -f 2.4G -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 I wonder if there is any one successfully running OFDM on USRP2, what are the command parameters you are using and if there is any modification in the code, can you let me know. Thanks, Bin ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio -- View this message in context: http://old.nabble.com/running-OFDM-on-USRP2-tp27342376p27427749.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
RE: [Discuss-gnuradio] running OFDM on USRP2
Hi Anupama Unfortunately, I can't offer a solution at this stage. However, I had similar error messages a few days ago. I thought perhaps these python scripts were to be used exclusively for the original USRPs, though I think in one or two posts I have seen, people mentioned successfully running them for USRP2s. Ian. -Original Message- From: discuss-gnuradio-bounces+ian.holland=rlmgroup.com...@gnu.org [mailto:discuss-gnuradio-bounces+ian.holland=rlmgroup.com...@gnu.org] On Behalf Of Anu000 Sent: Wednesday, 3 February 2010 8:04 AM To: Discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] running OFDM on USRP2 Hi, We did try the below command on two USRP2s coneected via a SMA Cable (Tx-Rx) with freq = 25M however it returned the following error on both sides At Rx side it shows like the below - [r...@gnuradio1 ofdm]# ./benchmark_ofdm_rx.py -f 25M -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 usrp: failed to find usrp[0] Traceback (most recent call last): File ./benchmark_ofdm_rx.py, line 210, in module main() File ./benchmark_ofdm_rx.py, line 199, in main tb = my_top_block(rx_callback, options) File ./benchmark_ofdm_rx.py, line 51, in __init__ self._setup_usrp_source() File ./benchmark_ofdm_rx.py, line 70, in _setup_usrp_source fusb_nblocks=self._fusb_nblocks) File /usr/lib/python2.6/site-packages/gnuradio/usrp/usrp_swig.py, line 1699, in source_c return _usrp_swig.source_c(*args, **kwargs) RuntimeError: can't open usrp At Tx side - r...@gnu2 ofdm]# ./benchmark_ofdm_tx.py -f 25M -i 512 --fft-length=64 --occupied-tones=32 --cp-length=4 usrp: failed to find usrp[0] Traceback (most recent call last): File ./benchmark_ofdm_tx.py, line 217, in module main() File ./benchmark_ofdm_tx.py, line 190, in main tb = my_top_block(options) File ./benchmark_ofdm_tx.py, line 51, in __init__ self._setup_usrp_sink() File ./benchmark_ofdm_tx.py, line 66, in _setup_usrp_sink fusb_nblocks=self._fusb_nblocks) File /usr/local/lib/python2.5/site-packages/gnuradio/usrp/usrp_swig.py, line 2415, in sink_c return _usrp_swig.sink_c(*args, **kwargs) RuntimeError: can't open usrp May we request somebody to support us at the earliest to resolve the above issue with either software or hardware . Thanks again, Anupama bin zan wrote: Hello, I was trying to run following OFDM command on USRP2, however, I got a bunch of Stime out at the receiver side. ./benchmark_ofdm_tx.py -f 2.4G -i 512 --fft-length=64 --occupied-tones=32 --cp-length=4 ./benchmark_ofdm_rx.py -f 2.4G -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 I wonder if there is any one successfully running OFDM on USRP2, what are the command parameters you are using and if there is any modification in the code, can you let me know. Thanks, Bin ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio -- View this message in context: http://old.nabble.com/running-OFDM-on-USRP2-tp27342376p27427749.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] running OFDM on USRP2
Hi, The example provided with the gnuradio codebase requires small modifications in order to work with USRP2. You can try with the modifications I made: www.cs.ucsb.edu/~veljko/downloads/ofdm_example.tar.gz In my case with XCVR2450 daughter boards running the following works fine: transmitter: benchmark_ofdm_tx_new.py -f 2.45G --tx-amplitude 0.9 -M 8 -s 200 -m bpsk --fft-length=512 --occupied-tones=80 -i 64 --tx-gain=10 --cp-length=128 receiver: benchmark_ofdm_rx_new.py -e eth1 -f 2.45G -m bpsk --fft-length=512 --occupied-tones=80 -d 64 --rx-gain=30 --cp-length=128 You can try with the transmitter only first and usrp2_fft.py on the other end, just to see if there's something getting transmitted and if it looks like OFDM. cheers, veljko 2010/2/2 Ian Holland ian.holl...@rlmgroup.com.au: Hi Anupama Unfortunately, I can't offer a solution at this stage. However, I had similar error messages a few days ago. I thought perhaps these python scripts were to be used exclusively for the original USRPs, though I think in one or two posts I have seen, people mentioned successfully running them for USRP2s. Ian. -Original Message- From: discuss-gnuradio-bounces+ian.holland=rlmgroup.com...@gnu.org [mailto:discuss-gnuradio-bounces+ian.holland=rlmgroup.com...@gnu.org] On Behalf Of Anu000 Sent: Wednesday, 3 February 2010 8:04 AM To: Discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] running OFDM on USRP2 Hi, We did try the below command on two USRP2s coneected via a SMA Cable (Tx-Rx) with freq = 25M however it returned the following error on both sides At Rx side it shows like the below - [r...@gnuradio1 ofdm]# ./benchmark_ofdm_rx.py -f 25M -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 usrp: failed to find usrp[0] Traceback (most recent call last): File ./benchmark_ofdm_rx.py, line 210, in module main() File ./benchmark_ofdm_rx.py, line 199, in main tb = my_top_block(rx_callback, options) File ./benchmark_ofdm_rx.py, line 51, in __init__ self._setup_usrp_source() File ./benchmark_ofdm_rx.py, line 70, in _setup_usrp_source fusb_nblocks=self._fusb_nblocks) File /usr/lib/python2.6/site-packages/gnuradio/usrp/usrp_swig.py, line 1699, in source_c return _usrp_swig.source_c(*args, **kwargs) RuntimeError: can't open usrp At Tx side - r...@gnu2 ofdm]# ./benchmark_ofdm_tx.py -f 25M -i 512 --fft-length=64 --occupied-tones=32 --cp-length=4 usrp: failed to find usrp[0] Traceback (most recent call last): File ./benchmark_ofdm_tx.py, line 217, in module main() File ./benchmark_ofdm_tx.py, line 190, in main tb = my_top_block(options) File ./benchmark_ofdm_tx.py, line 51, in __init__ self._setup_usrp_sink() File ./benchmark_ofdm_tx.py, line 66, in _setup_usrp_sink fusb_nblocks=self._fusb_nblocks) File /usr/local/lib/python2.5/site-packages/gnuradio/usrp/usrp_swig.py, line 2415, in sink_c return _usrp_swig.sink_c(*args, **kwargs) RuntimeError: can't open usrp May we request somebody to support us at the earliest to resolve the above issue with either software or hardware . Thanks again, Anupama bin zan wrote: Hello, I was trying to run following OFDM command on USRP2, however, I got a bunch of Stime out at the receiver side. ./benchmark_ofdm_tx.py -f 2.4G -i 512 --fft-length=64 --occupied-tones=32 --cp-length=4 ./benchmark_ofdm_rx.py -f 2.4G -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 I wonder if there is any one successfully running OFDM on USRP2, what are the command parameters you are using and if there is any modification in the code, can you let me know. Thanks, Bin ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio -- View this message in context: http://old.nabble.com/running-OFDM-on-USRP2-tp27342376p27427749.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
RE: [Discuss-gnuradio] running OFDM on USRP2
Thanks Veljko Actually, the problems I had were not with the OFDM case, but just benchmark_tx.py and benchmark_rx.py. Are similar modifications necessary for those scripts? Ian. Hi, The example provided with the gnuradio codebase requires small modifications in order to work with USRP2. You can try with the modifications I made: www.cs.ucsb.edu/~veljko/downloads/ofdm_example.tar.gz In my case with XCVR2450 daughter boards running the following works fine: transmitter: benchmark_ofdm_tx_new.py -f 2.45G --tx-amplitude 0.9 -M 8 -s 200 -m bpsk --fft-length=512 --occupied-tones=80 -i 64 --tx-gain=10 --cp-length=128 receiver: benchmark_ofdm_rx_new.py -e eth1 -f 2.45G -m bpsk --fft-length=512 --occupied-tones=80 -d 64 --rx-gain=30 --cp-length=128 You can try with the transmitter only first and usrp2_fft.py on the other end, just to see if there's something getting transmitted and if it looks like OFDM. cheers, veljko 2010/2/2 Ian Holland ian.holl...@rlmgroup.com.au: Hi Anupama Unfortunately, I can't offer a solution at this stage. However, I had similar error messages a few days ago. I thought perhaps these python scripts were to be used exclusively for the original USRPs, though I think in one or two posts I have seen, people mentioned successfully running them for USRP2s. Ian. -Original Message- From: discuss-gnuradio-bounces+ian.holland=rlmgroup.com...@gnu.org [mailto:discuss-gnuradio-bounces+ian.holland=rlmgroup.com...@gnu.org] On Behalf Of Anu000 Sent: Wednesday, 3 February 2010 8:04 AM To: Discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] running OFDM on USRP2 Hi, We did try the below command on two USRP2s coneected via a SMA Cable (Tx-Rx) with freq = 25M however it returned the following error on both sides At Rx side it shows like the below - [r...@gnuradio1 ofdm]# ./benchmark_ofdm_rx.py -f 25M -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 usrp: failed to find usrp[0] Traceback (most recent call last): File ./benchmark_ofdm_rx.py, line 210, in module main() File ./benchmark_ofdm_rx.py, line 199, in main tb = my_top_block(rx_callback, options) File ./benchmark_ofdm_rx.py, line 51, in __init__ self._setup_usrp_source() File ./benchmark_ofdm_rx.py, line 70, in _setup_usrp_source fusb_nblocks=self._fusb_nblocks) File /usr/lib/python2.6/site-packages/gnuradio/usrp/usrp_swig.py, line 1699, in source_c return _usrp_swig.source_c(*args, **kwargs) RuntimeError: can't open usrp At Tx side - r...@gnu2 ofdm]# ./benchmark_ofdm_tx.py -f 25M -i 512 --fft-length=64 --occupied-tones=32 --cp-length=4 usrp: failed to find usrp[0] Traceback (most recent call last): File ./benchmark_ofdm_tx.py, line 217, in module main() File ./benchmark_ofdm_tx.py, line 190, in main tb = my_top_block(options) File ./benchmark_ofdm_tx.py, line 51, in __init__ self._setup_usrp_sink() File ./benchmark_ofdm_tx.py, line 66, in _setup_usrp_sink fusb_nblocks=self._fusb_nblocks) File /usr/local/lib/python2.5/site-packages/gnuradio/usrp/usrp_swig.py, line 2415, in sink_c return _usrp_swig.sink_c(*args, **kwargs) RuntimeError: can't open usrp May we request somebody to support us at the earliest to resolve the above issue with either software or hardware . Thanks again, Anupama bin zan wrote: Hello, I was trying to run following OFDM command on USRP2, however, I got a bunch of Stime out at the receiver side. ./benchmark_ofdm_tx.py -f 2.4G -i 512 --fft-length=64 --occupied-tones=32 --cp-length=4 ./benchmark_ofdm_rx.py -f 2.4G -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 I wonder if there is any one successfully running OFDM on USRP2, what are the command parameters you are using and if there is any modification in the code, can you let me know. Thanks, Bin ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio -- View this message in context: http://old.nabble.com/running-OFDM-on-USRP2-tp27342376p27427749.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] running OFDM on USRP2
Hi, Thanks, we would try the below in our modifications . however is someone is aware if the below script works with Basic TX/Basic Rx Daughter Boards, that would be really helpful On Tue, Feb 2, 2010 at 5:05 PM, Ian Holland ian.holl...@rlmgroup.com.auwrote: Thanks Veljko Actually, the problems I had were not with the OFDM case, but just benchmark_tx.py and benchmark_rx.py. Are similar modifications necessary for those scripts? Ian. Hi, The example provided with the gnuradio codebase requires small modifications in order to work with USRP2. You can try with the modifications I made: www.cs.ucsb.edu/~veljko/downloads/ofdm_example.tar.gz In my case with XCVR2450 daughter boards running the following works fine: transmitter: benchmark_ofdm_tx_new.py -f 2.45G --tx-amplitude 0.9 -M 8 -s 200 -m bpsk --fft-length=512 --occupied-tones=80 -i 64 --tx-gain=10 --cp-length=128 receiver: benchmark_ofdm_rx_new.py -e eth1 -f 2.45G -m bpsk --fft-length=512 --occupied-tones=80 -d 64 --rx-gain=30 --cp-length=128 You can try with the transmitter only first and usrp2_fft.py on the other end, just to see if there's something getting transmitted and if it looks like OFDM. cheers, veljko 2010/2/2 Ian Holland ian.holl...@rlmgroup.com.au: Hi Anupama Unfortunately, I can't offer a solution at this stage. However, I had similar error messages a few days ago. I thought perhaps these python scripts were to be used exclusively for the original USRPs, though I think in one or two posts I have seen, people mentioned successfully running them for USRP2s. Ian. -Original Message- From: discuss-gnuradio-bounces+ian.holland=rlmgroup.com...@gnu.org [mailto:discuss-gnuradio-bounces+ian.hollanddiscuss-gnuradio-bounces%2Bian.holland =rlmgroup.com...@gnu.org] On Behalf Of Anu000 Sent: Wednesday, 3 February 2010 8:04 AM To: Discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] running OFDM on USRP2 Hi, We did try the below command on two USRP2s coneected via a SMA Cable (Tx-Rx) with freq = 25M however it returned the following error on both sides At Rx side it shows like the below - [r...@gnuradio1 ofdm]# ./benchmark_ofdm_rx.py -f 25M -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 usrp: failed to find usrp[0] Traceback (most recent call last): File ./benchmark_ofdm_rx.py, line 210, in module main() File ./benchmark_ofdm_rx.py, line 199, in main tb = my_top_block(rx_callback, options) File ./benchmark_ofdm_rx.py, line 51, in __init__ self._setup_usrp_source() File ./benchmark_ofdm_rx.py, line 70, in _setup_usrp_source fusb_nblocks=self._fusb_nblocks) File /usr/lib/python2.6/site-packages/gnuradio/usrp/usrp_swig.py, line 1699, in source_c return _usrp_swig.source_c(*args, **kwargs) RuntimeError: can't open usrp At Tx side - r...@gnu2 ofdm]# ./benchmark_ofdm_tx.py -f 25M -i 512 --fft-length=64 --occupied-tones=32 --cp-length=4 usrp: failed to find usrp[0] Traceback (most recent call last): File ./benchmark_ofdm_tx.py, line 217, in module main() File ./benchmark_ofdm_tx.py, line 190, in main tb = my_top_block(options) File ./benchmark_ofdm_tx.py, line 51, in __init__ self._setup_usrp_sink() File ./benchmark_ofdm_tx.py, line 66, in _setup_usrp_sink fusb_nblocks=self._fusb_nblocks) File /usr/local/lib/python2.5/site-packages/gnuradio/usrp/usrp_swig.py, line 2415, in sink_c return _usrp_swig.sink_c(*args, **kwargs) RuntimeError: can't open usrp May we request somebody to support us at the earliest to resolve the above issue with either software or hardware . Thanks again, Anupama bin zan wrote: Hello, I was trying to run following OFDM command on USRP2, however, I got a bunch of Stime out at the receiver side. ./benchmark_ofdm_tx.py -f 2.4G -i 512 --fft-length=64 --occupied-tones=32 --cp-length=4 ./benchmark_ofdm_rx.py -f 2.4G -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 I wonder if there is any one successfully running OFDM on USRP2, what are the command parameters you are using and if there is any modification in the code, can you let me know. Thanks, Bin ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio -- View this message in context: http://old.nabble.com/running-OFDM-on-USRP2-tp27342376p27427749.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] running OFDM on USRP2
Hi, I have gnuradio 3.2.2 installed on Ubintu 9.10 and I'm using USRP2s with XCVR2450 daughterboards. I tried your example but I changed the interpolation to correspond to the decimation at the receiver: ./benchmark_ofdm_tx.py -f 2.4G -i 256 --fft-length=64 --occupied-tones=32 --cp-length=4 ./benchmark_ofdm_rx.py -f 2.4G -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 And it works fine. When I tested the example I played with tx and rx gains and the tx-amplitude to find the best setting. Cheers, Veljko 2010/1/27 bin zan zanbin2...@gmail.com: Hello, I was trying to run following OFDM command on USRP2, however, I got a bunch of Stime out at the receiver side. ./benchmark_ofdm_tx.py -f 2.4G -i 512 --fft-length=64 --occupied-tones=32 --cp-length=4 ./benchmark_ofdm_rx.py -f 2.4G -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 I wonder if there is any one successfully running OFDM on USRP2, what are the command parameters you are using and if there is any modification in the code, can you let me know. Thanks, Bin ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] running OFDM on USRP2
Thanks Veljko, Did you do any modification on the gnuradio 3.2.2 code? (Because at my side the interpolation/decimation was not the problem, I forgot to change the value in the email) Bin On Wed, Jan 27, 2010 at 2:44 PM, Veljko Pejovic vel...@cs.ucsb.edu wrote: Hi, I have gnuradio 3.2.2 installed on Ubintu 9.10 and I'm using USRP2s with XCVR2450 daughterboards. I tried your example but I changed the interpolation to correspond to the decimation at the receiver: ./benchmark_ofdm_tx.py -f 2.4G -i 256 --fft-length=64 --occupied-tones=32 --cp-length=4 ./benchmark_ofdm_rx.py -f 2.4G -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 And it works fine. When I tested the example I played with tx and rx gains and the tx-amplitude to find the best setting. Cheers, Veljko 2010/1/27 bin zan zanbin2...@gmail.com: Hello, I was trying to run following OFDM command on USRP2, however, I got a bunch of Stime out at the receiver side. ./benchmark_ofdm_tx.py -f 2.4G -i 512 --fft-length=64 --occupied-tones=32 --cp-length=4 ./benchmark_ofdm_rx.py -f 2.4G -d 256 --fft-length=64 --occupied-tones=32 --cp-length=4 I wonder if there is any one successfully running OFDM on USRP2, what are the command parameters you are using and if there is any modification in the code, can you let me know. Thanks, Bin ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
