[Discuss-gnuradio] generate data with certain bit rate
I want to transmit data 00101110011 with data rate 10kb/sec and i ask how to generate this data with this certain rate -- View this message in context: http://old.nabble.com/generate-data-with-certain-bit-rate-tp3407p3407.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] generate data with certain data rate
i want to transmitting data ( 001011101100) with bit rate (200kb/sec) i ask how to generate this data with this certain data rate ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] How to exit GNU radio program
Hello All, I am writing a basic GNU radio program. The program has 3 blocks, USRP2 , bandpass filter and file sink. I want to read some specific frequency band and write the values to the file. The object of my class is called Tb I start the program by Tb.Run() But I the program goes to an infinite loop and never stops. I have tried Tb.start() Tb.stop() Tb.wait() Sys.exit() But the program does not exit. I want to run my filter program for two different frequencies but it never stops so I am unable to run it the second time. Umer ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] tunnel.py doesn't work on expected frequency
anyone has idea? On Tue, Jun 19, 2012 at 5:30 PM, Weixian Zhou wrote: > I am using two USRP N210s (daughter boards are XCVR2450) and the supported > frequency in theory ranged in 2.4GHz ~ 2.5GHz. I have done experiment to > test the working freq using benchmark_tx/benchmark_rx, the working freq is > 2.41G, 2,42G, 243G, 2.44G, 2.46G, 2.47G, 2.48G, 2.49G, 2.50G, 2.51G, 2.52G. > But when I tested tunnel.py, the working freq is only 2.50 G and 2.51G. Why > doesn't tunnel.py work on the same frequencies as benchmark_tx/benchmark_rx? > > -- > Regards, > Weixian Zhou > > > -- Regards, Weixian Zhou ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] error graphics uhd_fft.py usrp2_rfx900
Have you tried reducing the gain or reducing the input signal strength? --n On Wed, Jun 27, 2012 at 7:52 AM, Julio Hector Aguilar Renteria < jhagui...@gmail.com> wrote: > > Hi, I need help removing the peaks generated graphics, I use usrp2 with > rfx900. > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] [USRP-users] Getting a -135 dBm/Hz noise spectral density in USRP N210
You are exactly right! We were using TX/RX antenna port in the WBX receiver daughterboard. I get almost -170 dBm/Hz noise spectral density when I select RX2. This is almost perfect! Thanks! Your email increased my pathloss calculation range by 30 dB :) Nazmul On Wed, Jun 27, 2012 at 9:22 AM, Jason Roehm wrote: > Do you have the correct antenna port selected? I believe that RX2 is the > default for the SBX. If you are injecting signal into the port that isn't > selected, then you'll see ~30-40 dB of isolation in the front-end antenna > switch. That seems to be in the neighborhood of the difference that you're > seeing. > > Jason > > > On 06/27/2012 01:51 AM, Nazmul Islam wrote: > > Hello, > > I am trying to measure channel path loss using two USRP N210. I need to > measure the noise floor so that I can find the threshold for pathloss > measurement. I am using the attached flowgraph to calibrate the receiver > signal strength. I tried two ways to calibrate the receiver power and both > show me approximately -135 dBm/Hz noise spectral density. > > 1. At first I don't transmit anything and measure the power of the > floating point numbers that is coming out of rx USRP block. Then I > transmit a PN sequence of -5 dBm power at 17 MS/s from an USRP. I connect > this USRP through a 60 dB attenuator to the receiver USRP. This input (-65 > dBm) seems to double the power of the floating point numbers. I infer that > the my USRP noise floor is equivalent to -65 dB at 17 MHz. > > 2. I also apply an external 1 MHz noise source of -75 dBm power to the > receiver USRP. This leads to an increase of 3 dB power in the receiver FFT > plot. This also suggests I have -75 dBm noise power at 1 MHz. > > Both these experiments suggest -135 dBm/Hz noise spectral density in my rx > USRP. However, this is very far from theoretical noise spectral density > (approximately -170 dBm/Hz). My Rx USRP N210 has a WBX daughterboard and my > Tx USRP has an SBX daughterboard. The ettus websites suggest only 6 dB > noise figure (http://code.ettus.com/redmine/ettus/documents/16). If my > USRP daughterboard is not faulty, I must be giving some wrong parameters. I > put the RX gain as 30 dB to get the full range of WBX daughterboards ( > http://files.ettus.com/uhd_docs/manual/html/dboards.html). Shall I > increase it more? > > Thanks for your help. > > Nazmul > > > -- > Muhammad Nazmul Islam > > Graduate Student > Electrical & Computer Engineering > Wireless Information & Networking Laboratory > Rutgers, USA. > > > > ___ > USRP-users mailing > listUSRP-users@lists.ettus.comhttp://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > > > ___ > USRP-users mailing list > usrp-us...@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > > -- Muhammad Nazmul Islam Graduate Student Electrical & Computer Engineering Wireless Information & Networking Laboratory Rutgers, USA. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] spectrum analyzer usrp2+rfx900
I can to sweeping the frequency band from 800 Mhz to 1000 MHz with usrp2+rfx900 (spectrum analyzer). ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] How to exit GNU radio program
On Wed, Jun 27, 2012 at 02:24:41PM +0100, umer.rabb...@bt.com wrote: > I am writing a basic GNU radio program. The program has 3 blocks, USRP2 , > bandpass filter and file sink. Put in a gr.head() M -- Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin Braun Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-43790 Fax: +49 721 608-46071 www.cel.kit.edu KIT -- University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association pgpwAf2HWRRyZ.pgp Description: PGP signature ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] usrp2 not transmitting data.
Hi, all, LED A USRP2 OFF—The module is not transmitting data. help... ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] usrp2 not transmitting data.
On 27 Jun 2012 13:16, Julio Hector Aguilar Renteria wrote: > Hi, all, > > LED A USRP2 OFF--The module is not transmitting data. > > help... More context would be very helpful. What application are you using? What steps have you taken to debug the problem, and what were the results? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] spectrum analyzer usrp2+rfx900
Julio, The answer is YES, but also the signal quality depends on your RF front-end configuration such as antenna, amplifiers, etc. What kind of signals are you trying to detect and/or decode? Jose M. On Wed, Jun 27, 2012 at 8:26 AM, Julio Hector Aguilar Renteria wrote: > I can to sweeping the frequency band from 800 Mhz to 1000 MHz with > usrp2+rfx900 (spectrum analyzer). > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] spectrum analyzer usrp2+rfx900
Hi, is a signal un the frecuence band cell, I but use only usrp2 with daurherboard rfx900 and antenna between 800 and 900 mhz Sent from my Windows Phone From: turbovectorz turbovectorz Sent: 27/06/2012 12:28 p.m. To: Julio Hector Aguilar Renteria Cc: discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] spectrum analyzer usrp2+rfx900 Julio, The answer is YES, but also the signal quality depends on your RF front-end configuration such as antenna, amplifiers, etc. What kind of signals are you trying to detect and/or decode? Jose M. On Wed, Jun 27, 2012 at 8:26 AM, Julio Hector Aguilar Renteria wrote: > I can to sweeping the frequency band from 800 Mhz to 1000 MHz with > usrp2+rfx900 (spectrum analyzer). > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] spectrum analyzer usrp2+rfx900
Julio, Usually, the frequency band is used by 800 MHz trunking radio. So, I presume you are scanning for GSM 850 and iDEN 800? If that's the case, you will be able to detect the different type of modulations, GMSK and M16QAM. If you know the specifications, you will be able to decode it. Jose M. On Wed, Jun 27, 2012 at 10:46 AM, Julio Hector Aguilar Renteria wrote: > Hi, is a signal un the frecuence band cell, I but use only usrp2 with > daurherboard rfx900 and antenna between 800 and 900 mhz > > Sent from my Windows Phone > From: turbovectorz turbovectorz > Sent: 27/06/2012 12:28 p.m. > To: Julio Hector Aguilar Renteria > Cc: discuss-gnuradio@gnu.org > Subject: Re: [Discuss-gnuradio] spectrum analyzer usrp2+rfx900 > Julio, > > The answer is YES, but also the signal quality depends on your RF > front-end configuration such as antenna, amplifiers, etc. > > What kind of signals are you trying to detect and/or decode? > > Jose M. > > On Wed, Jun 27, 2012 at 8:26 AM, Julio Hector Aguilar Renteria > wrote: >> I can to sweeping the frequency band from 800 Mhz to 1000 MHz with >> usrp2+rfx900 (spectrum analyzer). >> >> >> ___ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Questions
Hi all , i have some questions : In OFDM Modulator Block , in Mapper Sub-block , in path of : ./lib/digital_ofdm_mapper_bcv.cc 1- I saw the following comment inside the code : " Eventually, we will get rid of the occupied_carriers concept. " , the question how you get rid of the occupied carriers concept in the code and why ? . as i see the code depends strongly on this concept . 2- Why the concept of occupied carriers is used and why filling only part of FFT size not all of it ? 3-Inside the code , string carriers = "FE7F" . I have two questions here , the first is , when converting to bits : 11100111 , why there is two zeros at DC instead of one zero only ? The second question is , you started with "FE7F" . Why didn't you start with "E7" and then pad F's from both sides (looping) as you did later !? 4- Also , for the following segment of the code : diff = (d_occupied_carriers - 4*carriers.length()) . Why you are multiplying by four instead of eight when converting from Character Domain to Bit Domain ? or you deal with them as HEX only ? 4- How many OFDM Symbols exist in one packet ? 5- What is the maximum packet size ? 6- What is the difference between coming message and the packet . Are they the same thing ? or Does one message contain more than one packet ? Thanks in-advance Amr , ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] uhd_fft.py LED A turn ON/OFF
Regards, when I use the example uhd_fft.py with USRP 2, the LED_A must be turned on or off? ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] uhd_fft.py LED A turn ON/OFF
On 06/27/2012 12:54 PM, Julio Hector Aguilar Renteria wrote: > Regards, > > when I use the example uhd_fft.py with USRP 2, the LED_A must be turned on > or off? > A is transmit LED. See: http://files.ettus.com/uhd_docs/manual/html/usrp2.html#front-panel-leds -josh > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] tunnel.py doesn't receive packages when transmit and receive frequencies are different
I run tunnel.py with two machines and there are some packages exchange immediately after setting the network interface gr0. If I set the frequencies of transmit and receive the same, packages are transmitted and received at both machines: on machine A: *sudo ./tunnel.py -f 2.4xG ; sudo ifconfig gr0 192.168.200.1 * on machine B: *sudo ./tunnel.py -f 2.4xG ; sudo ifconfig gr0 192.168.200.2* But when I set the frequencies of transmit and receive different under 2.5GHz, packages can't be received at both machines: on machine A: *sudo ./tunnel.py --tx-freq=2.4xG --rx-freq=2.4yG; sudo ifconfig gr0 192.168.200.1 * on machine B: *sudo ./tunnel.py --tx-freq=2.4yG --rx-freq=2.4xG; sudo ifconfig gr0 192.168.200.2* The wired thing is that when I set the frequencies of transmit and receive different above 2.5GHz, packages can be again transmitted and received: on machine A: *sudo ./tunnel.py --tx-freq=2.51G --rx-freq=2.512G; sudo ifconfig gr0 192.168.200.1 * on machine B: *sudo ./tunnel.py --tx-freq=2.512G --rx-freq=2.51G; sudo ifconfig gr0 192.168.200.2* I am using USRP N210s and the daughter boards are both XCVR2450. Does anyone can explain why the tunnel.py doesn't receive packages when transmit and receive frequencies are different under 2.5GHz? -- Regards, Weixian Zhou ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] generate data with certain bit rate
On Wed, Jun 27, 2012 at 8:19 AM, eng_ali_2020 wrote: > > I want to transmit data 00101110011 with data rate 10kb/sec and i ask how to > generate this data with this certain rate Look at the gr-digital/examples/narrowband files, specifically benchmark_tx.py. With the resampler in it, you should be able to get down to 10 kbps. Tom ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Where is the stream_selector module in the latest gnuradio release?
Hi list, I used the stream_selector module created by josh several months ago. This module is in the top component named gr-blocks. But in recent release(3.6.0 or 3.6.1) I cannot find gr-blocks and so cannot get the useful stream_selector module. Does anyone know where is it now? Thanks! BR, Zhonghua ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Where is the stream_selector module in the latest gnuradio release?
On 06/27/2012 06:20 PM, zhonghua wrote: > Hi list, > > I used the stream_selector module created by josh several months ago. > This module is in the top component named gr-blocks. But in recent > release(3.6.0 or 3.6.1) I cannot find gr-blocks and so cannot get the > useful stream_selector module. Does anyone know where is it now? Thanks! > Its part of the GrExtras project: https://github.com/guruofquality/grextras/wiki -josh > BR, > > Zhonghua > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
