Re: [Discuss-gnuradio] Failed Install + gr-osmosdr Troubles

2013-12-12 Thread Martin Braun (CEL)
On Wed, Dec 11, 2013 at 06:52:30PM -0500, Marcus Leech wrote: Just for fun I uninstalled everything and tried installing with pybombs. However when it got to the step which builds filter_swigPYTHON_wrap there was an issue: [ 78%] Building CXX object

Re: [Discuss-gnuradio] Bit error rate test

2013-12-12 Thread Martin Braun (CEL)
On Wed, Dec 11, 2013 at 04:15:11PM -0700, Henry Jin wrote: I tried to use digital_bert_tx.py and digital_bert_rx.py to test the BER performance of different modulations. The command I use is ./digital_bert_tx.py --tx-freq=5.1e9 --tx-gain=30 -S 8 --mod-code=gray -m bpsk. The results for BPSK

[Discuss-gnuradio] UHD USRP sink does not react to gain changes (gr-ieee802-11: between two usrp devices)

2013-12-12 Thread Nasi
Dear All, I need your help. May be any of you had such a problem before: I use 'IEEE 802.11 a/g/p OFDM Transceiver' project, Ubuntu 13.04, GNURADIO 3.7 and (USRP N200 + XCVR 2450 + VERT2450 antenna). I start the transmission using the first laptop and USRP N200 device by running the

[Discuss-gnuradio] Unexpected issue with file source and USRP source

2013-12-12 Thread Maria Stevens
GNU Radio Companion v3.6.4-43-g6e5dfe1a linux; GNU C++ version 4.6.3; Boost_104800; UHD_003.005.001-37-g21311276 USRP N210 Hello All ! I am observing following 3 cases for same transmitter. I ran each case multiple times and reach to conclusion that only CASE 1 is working fine. CASE 1: First i

Re: [Discuss-gnuradio] Unexpected issue with file source and USRP source

2013-12-12 Thread Martin Braun (CEL)
On Thu, Dec 12, 2013 at 03:54:29PM +0500, Maria Stevens wrote: So, Only case 1 is working for me. I am not using any custom gnuradio-block in my receiver. Major blocks in my demodulator chain consists of FIR filters, gr_pfb_clock_sync_ccf and packet decoder along with some adders subtractors

Re: [Discuss-gnuradio] UHD USRP sink does not react to gain changes (gr-ieee802-11: between two usrp devices)

2013-12-12 Thread Bastian Bloessl
On 12 Dec 2013, at 11:31, Nasi nesaz...@mail.ru wrote: Meanwhile I use the second laptop and USRP N200 device as the receiver by running the ./ofdm_rx.py. The error rate is very high. So you receive some packets or none? The problem is that when I change gain in the USRP sink nothing

[Discuss-gnuradio] OFDM Transmitter GRC Example

2013-12-12 Thread ZaInzAiN Jj
Dear all, In OFDM transmitter example there is Stream to Tagged Stream block with packet length value 96. What it's mean? And whether the value claim specific standard? Thanks, Ahmad___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org

Re: [Discuss-gnuradio] UHD USRP sink does not react to gain changes (gr-ieee802-11: between two usrp devices)

2013-12-12 Thread Nasi
Meanwhile I use the second laptop and USRP N200 device as the receiver by running the ./ofdm_rx.py. The error rate is very high. So you receive some packets or none? Yes, I receive hopefully. But the packer error rate is too high. I went through different configurations and gains. And

Re: [Discuss-gnuradio] OFDM Transmitter GRC Example

2013-12-12 Thread Martin Braun (CEL)
On Thu, Dec 12, 2013 at 08:27:19PM +0800, ZaInzAiN Jj wrote: This is OFDM transmitter grc file On Thursday, December 12, 2013 7:22 PM, ZaInzAiN Jj zain_zain...@yahoo.com wrote: Dear all, In OFDM transmitter example there is Stream to Tagged Stream block with packet length value 96.

Re: [Discuss-gnuradio] UHD USRP sink does not react to gain changes (gr-ieee802-11: between two usrp devices)

2013-12-12 Thread Bastian Bloessl
On 12 Dec 2013, at 15:26, Nasi nesaz...@mail.ru wrote: Yes, I receive hopefully. But the packer error rate is too high. I went through different configurations and gains. And finally I see that the problem is the transmission side. The gain does not have any influence on the error rate.

Re: [Discuss-gnuradio] UHD USRP sink does not react to gain changes (gr-ieee802-11: between two usrp devices)

2013-12-12 Thread Nasi
Just to be sure: do you have the current version? (some weeks ago I normalized the signal power to 1 without pushing updates of the flow graphs. That lead to distorted signals. In that case, changing the gain does not help.) I reinstalled it previous week, I guess on Saturday. Before it was

[Discuss-gnuradio] Strange Received Signal for 2x1 MISO OFDM (sometimes!)

2013-12-12 Thread David Halls
Hi, I am trying to transmit 2x1 MISO OFDM. The two transmit USRPs are connected by MIMO cable, and the USRP sink section of the .py file is: self.uhd_usrp_sink_0_0_0 = uhd.usrp_sink( device_addr=addr0=192.168.10.2,addr1=192.168.10.7, stream_args=uhd.stream_args(

[Discuss-gnuradio] [VOLK] Summary of call

2013-12-12 Thread West, Nathan
The VOLK working group had a call earlier today. Agenda and summary are here: http://gnuradio.org/redmine/projects/gnuradio/wiki/Call20131212 We'll likely have our next call late January or February time-frame. There's a semi-open question about what kind of stats we should collect. Tim added

Re: [Discuss-gnuradio] Minimum amount of data to trigger WX GUI Scope Sink? and Ch 1 vs. Ch2 with Ch 3 vs. Ch 4

2013-12-12 Thread Wayne Roberts
The trigger of scope sink is not for XY mode. If you want to view two complex signal simultaneous, then it seems you need two scope sinks. If you dont see anything, maybe you have a block driving it that doesnt output anything until some condition is met. On Wed, Dec 11, 2013 at 10:53 AM,

Re: [Discuss-gnuradio] [VOLK] Summary of call

2013-12-12 Thread Douglas Geiger
On Thu, Dec 12, 2013 at 3:11 PM, West, Nathan n...@ostatemail.okstate.eduwrote: The VOLK working group had a call earlier today. Agenda and summary are here: http://gnuradio.org/redmine/projects/gnuradio/wiki/Call20131212 We'll likely have our next call late January or February time-frame.

Re: [Discuss-gnuradio] [VOLK] Summary of call

2013-12-12 Thread Tim
On 12/12/2013 04:01 PM, Douglas Geiger wrote: On Thu, Dec 12, 2013 at 3:11 PM, West, Nathan n...@ostatemail.okstate.edu mailto:n...@ostatemail.okstate.edu wrote: The VOLK working group had a call earlier today. Agenda and summary are here:

Re: [Discuss-gnuradio] [VOLK] Summary of call

2013-12-12 Thread Tom Rondeau
On Thu, Dec 12, 2013 at 4:07 PM, Tim tim.oshea...@gmail.com wrote: On 12/12/2013 04:01 PM, Douglas Geiger wrote: On Thu, Dec 12, 2013 at 3:11 PM, West, Nathan n...@ostatemail.okstate.edu wrote: The VOLK working group had a call earlier today. Agenda and summary are here:

Re: [Discuss-gnuradio] Bit error rate test

2013-12-12 Thread Henry Jin
Thanks for your reply, Martin. I can understand your point that the estimated SNR in the script corresponds to ES/N0, which should be twice of Eb/N0 in the case of qpsk. You do raise a good question: why the BER is shown as 10^(-11)? I rechecked the script. The default bit rate is 250e3, which