Re: [Discuss-gnuradio] sending sine wave, but created another unwanted frequency component

2018-01-22 Thread Yang Liu
to 10e6 and the second component disappeared. Thanks, Yang On Sun, Jan 21, 2018 at 1:18 PM, Jeff Long wrote: > Try reducing the RX filter bandwidth, the gain of the receiver and/or > transmitter, or moving the TX and RX apart, and see what happens. This is > aliasing, and probably has n

Re: [Discuss-gnuradio] sending sine wave, but created another unwanted frequency component

2018-01-22 Thread Yang Liu
Hi D J, Thanks for the link, this is alias. If I fix the waveform frequency, say 2.4e6, and increase tx sampling rate from 5e6 to 10e6, this problem should be solved right? I just did experiment, and found the second component disappeared. Thanks, Yang On Mon, Jan 22, 2018 at 9:39 AM, D J wrote

[Discuss-gnuradio] sending sine wave, but created another unwanted frequency component

2018-01-21 Thread Yang Liu
his can happen. Any thoughts about this will be greatly appreciated! Best, Yang ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] resample ratio for fractional_resampler

2017-10-24 Thread Yang Liu
filter before or after resampling? to my understanding, it will not change the spectrum, but the order of low pass filters is different since the rate is different. Thanks, Yang On Tue, Oct 24, 2017 at 10:12 AM, Marcus Müller wrote: > Hi Andy, > > The fallacy I had in my own head was that

Re: [Discuss-gnuradio] resample ratio for fractional_resampler

2017-10-23 Thread Yang Liu
low things down? Thanks, Yang On Mon, Oct 23, 2017 at 5:47 AM, Marcus Müller wrote: > Hi Yang, > > for questions of performance, it's usually best to consult the source code > itself. By the way, fractional_resampler_** has been renamed > mmse_resampler_** on git's "

[Discuss-gnuradio] resample ratio for fractional_resampler

2017-10-22 Thread Yang Liu
ample rate is high :) Thanks a lot for your help. Best, Yang ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] how does OFDM receiver distinguish the wanted signal

2017-10-10 Thread Shi Yang
subtract the self interference? Thanks in advance and best regards, Yang ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] fails to add two data stream properly

2017-10-04 Thread Yang Liu
there exist some functions that can help to add burst signal and streaming data together without losing anything in both. I have been struggling with this for a long time.:( Thanks a lot for your help in advance! Best, Yang ___ Discuss-gnuradio mailing

Re: [Discuss-gnuradio] rx_ofdm example

2017-09-26 Thread Shi Yang
iply block for. While I was writing this email it hit me. The negative frequency offset is multiplied with the data stream for the fine frequency correction. Is that right? But why is the delay block necessary? Best regards, Yang On Tue, 26 Sep 2017 14:01:29 +0200 "Shi Yang" wrote:

[Discuss-gnuradio] rx_ofdm example

2017-09-26 Thread Shi Yang
s in advance and best regards, Yang ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] sync_word of ofdm transmission

2017-09-25 Thread Shi Yang
? But what is sync_word2 for? After setting it my flow graph could not work (without that it worked just fine). And why it does not need to fill with zeros on alternating carriers, since the preamble is repeated twice? The grc file is attached. Looking forward to your help. Yang test_tx.grc

[Discuss-gnuradio] burst transmission using message_burst_source with SOB and EOB tag

2017-08-03 Thread Yang Liu
essage should be expected. Therefore, I feel confused about the using of SOB and EOB tags here. Can they help to remove "underrun" under burst transmission? If not, is there any other methods that can make burst transmission with usrp possible without triggering underrun? Thanks

[Discuss-gnuradio] usrp x310 full duplex: receiving flowgraph can cause underflow problem at transmitter side

2017-06-23 Thread Yang Liu
x27;t work. Maybe blocks at transmitter can't get the resource it needs while RX flowgraph is busy at processing? Any explanations to this observation and any advice about how to tackle this will be greatly appreciated! Thanks, Yang ___ Discuss-gnurad

[Discuss-gnuradio] error 127

2015-04-20 Thread Fei Yang
my system is cubieboard sdr is usrp1 my os is Distributor ID: Ubuntu Description: Ubuntu 12.04.4 LTS Release: 12.04 Codename: precise kernel is Linux Qbee-X 3.4.79-sun7i+ #39 SMP PREEMPT Wed Feb 12 19:20:27 EST 2014 armv7l armv7l armv7l GNU/Linux git clone git://github.com/ttsou/gnuradio chec

Re: [Discuss-gnuradio] Log raw data from the usrp_spectrum_sense.py

2014-12-05 Thread Leo Yang
thank u sir, now, i just want to export the complex stream that goes into the sink, is that possible? whats the format of the that complex stream? cuz, in the my group design, USRP is in charge of signal collection, the rest signal processing(FFT) work will pass to a FPGA. -- View this message

Re: [Discuss-gnuradio] Log raw data from the usrp_spectrum_sense.py

2014-12-04 Thread Leo Yang
ignal classification. Thanks a lot Yang -- View this message in context: http://gnuradio.4.n7.nabble.com/Log-raw-data-from-the-usrp-spectrum-sense-py-tp51503p51545.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing

Re: [Discuss-gnuradio] Log raw data from the usrp_spectrum_sense.py

2014-12-04 Thread Leo Yang
Hi sir, I'm using USRP2 now, as the sample rate is limited to 25MHz for 16bit sample, I thought it can only sweep 25MHz at one time, but when u said USRP source can get as much bandwidth at once, it confused me. The Wi-Fi frequency is from 2.38GHz to 2.42GHz,which 25MHz is not enough for such larg

Re: [Discuss-gnuradio] Log raw data from the usrp_spectrum_sense.py

2014-12-04 Thread Leo Yang
when u said:save the signal from a USRP to a file, that's a two block flow graph in the GNU Radio companion: Just connect the USRP Source to a File Sink, parameterize both to your likings, and you're done. the two block flow graph can only use for narrow band, my idea is to sensing the wide ban

Re: [Discuss-gnuradio] Log raw data from the usrp_spectrum_sense.py

2014-12-01 Thread Leo Yang
When u say complex samples, i thought it should in time domain, and after the the fft block, it transfer to frequency domain. I just want use USRP to collect the a wide band signal around and save the data to the txt file, so i use the usr_spectrum_sense. and how to make the binary samples visuali

[Discuss-gnuradio] Log raw data from the usrp_spectrum_sense.py

2014-12-01 Thread Leo Yang
I'm using the usrp_spectrum_sense.py to get the raw data for the wide band spectrum for FFT in the FPGA . The thing confused me is what the raw data is. Is that the complex signal before fft ? As m.raw_data is a string that contains the binary floats, when i try to log it in a txt file, it output

Re: [Discuss-gnuradio] Question about Plotting the Spectrum(Power against frequency) with usrp_sense.py

2014-11-24 Thread Leo Yang
the plot should be the power of the signal against the frequency, when u say the format, do u mean the type of the variable ? -- View this message in context: http://gnuradio.4.n7.nabble.com/Question-about-Plotting-the-Spectrum-Power-against-frequency-with-usrp-sense-py-tp51380p51413.html Sent

[Discuss-gnuradio] Received Signal Power question

2014-11-24 Thread Leo Yang
I found one modified example from usrp_spectrum_sense.py which mentioned the power and noise calculation, could u plz help me figure out how it works? for i_bin in range(bin_start, bin_stop): center_freq = m.center_freq freq = bin_freq(i_bin, center_freq)

[Discuss-gnuradio] Question about Plotting the Spectrum(Power against frequency) with usrp_sense.py

2014-11-21 Thread Leo Yang
Question about the spectrum plot of the usr_sense.py: I have modified the old usrp_spectrum_sense.py to fit the latest version of gnuradio, and now I can run the program and export the m.data into a txt file, I wonder how to plot the dynamic graph of power against frequency for the visualization of

Re: [Discuss-gnuradio] USRP spectrum sensing

2014-11-12 Thread Leo Yang
Thanks very mush sir, the program now is working. -- View this message in context: http://gnuradio.4.n7.nabble.com/USRP-spectrum-sensing-tp51288p51300.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list D

Re: [Discuss-gnuradio] USRP spectrum sensing

2014-11-12 Thread Leo Yang
Thanks again, I found the problem where it comes, it seems in latest version, I did not import Blocks in the begin, hence the program seems can find stream_to_vector function ;) But a same error comes with fft_vcc which is included in fft,which has already imported http://gnuradio.org/doc/doxygen/

Re: [Discuss-gnuradio] USRP spectrum sensing

2014-11-12 Thread Leo Yang
When i search the usrp spectrum sensing stuff, this source code is first comes out, and there is some relative explanation of this program, and I just met gnuradio few weeks ago. btw, where to find the current version file of gnuradio -- View this message in context: http://gnuradio.4.n7.nabb

Re: [Discuss-gnuradio] USRP spectrum sensing

2014-11-12 Thread Leo Yang
I do have modified the code, and I made this program based on the tutorial video in Youtube https://www.youtube.com/watch?v=DiVvnMJsVBg which seems like two years ago stuff. I'm not sure whether it fit the latest version of gnuradio. I just found there are some head file difference and flow_graph-

Re: [Discuss-gnuradio] USRP spectrum sensing

2014-11-12 Thread Leo Yang
Thanks a lot for ur replay first, i got the source code from http://gnuradio.org/redmine/projects/gnuradio/repository/revisions/9880e7bb383054aa43681b52ebd33c8fd4cb8fcb/entry/gnuradio-examples/python/usrp/usrp_spectrum_sense.py and a bit modified has been made. u said "get it somewhere", u mean

Re: [Discuss-gnuradio] USRP spectrum sensing

2014-11-12 Thread Leo Yang
But when i run the other programs which include stream_to_vector function, they all works well, it quiet confused me -- View this message in context: http://gnuradio.4.n7.nabble.com/USRP-spectrum-sensing-tp51288p51290.html Sent from the GnuRadio mailing list archive at Nabble.com.

[Discuss-gnuradio] USRP spectrum sensing

2014-11-12 Thread Leo Yang
When I implement the source code " usrp_spectrum_sense.py", the program can be compile but when I enter the start, end frequency and fft size it comes with a error:‘module’ object has no attribute ’stream_to_vector. Has anyone meet this error before. and I found some solution : rename the project f

Re: [Discuss-gnuradio] benchmark_xx.py not consistent output

2012-09-06 Thread Qing Yang
cool ... -- Yang, Qing Information Engineering, CUHK 2012/9/7 usrp n210 > I am using 3 USRPs (USRP N210 ). > I run example program "benchmark_rx.py " and "benchmark_tx.py " in > /gr-digital/examples/narrowband/. > I performed experiment on 2 USRP's(A,B) at

Re: [Discuss-gnuradio] How to utilize multi-thread processor

2012-09-02 Thread Qing Yang
tion, right? Perhaps the VOLK lib will help, I will try it out. Sincerely, -- Yang, Qing Information Engineering, CUHK 2012/8/28 Tom Rondeau > On Mon, Aug 27, 2012 at 7:07 AM, Qing Yang wrote: > > Hi there, > > > > I am currently doing a OFDM transceiver project based on

Re: [Discuss-gnuradio] Profile gr python code using Oprofile and Kcachegrind

2012-09-02 Thread Qing Yang
ctive. That's why I want to profile python code rather than C++ code. Sincerely, -- Yang, Qing Information Engineering, CUHK 2012/9/1 Tom Rondeau > On Fri, Aug 31, 2012 at 7:10 AM, Christian Gagneraud > wrote: > > On 28/08/12 09:21, Qing Yang wrote: > >> > >> H

Re: [Discuss-gnuradio] Profile gr python code using Oprofile and Kcachegrind

2012-08-30 Thread Qing Yang
Hi Tom, Kcachegrind can only show the cost of C++ functions, can we get the cost of python functions or python modules? Because it is more interesting to look at the cost of each gr modules in the python code level. Sincerely, -- Yang, Qing Information Engineering, CUHK 2012/8/28 Tom Rondeau

Re: [Discuss-gnuradio] Profile gr python code using Oprofile and Kcachegrind

2012-08-29 Thread Qing Yang
ion, why do you guys recommend Oprofile? Sincerely, -- Yang, Qing Information Engineering, CUHK 2012/8/28 Tom Rondeau > On Tue, Aug 28, 2012 at 4:21 AM, Qing Yang wrote: > > Hi everyone, > > > > Where can I find a concrete example on how to profile the gnuradio code >

[Discuss-gnuradio] Profile gr python code using Oprofile and Kcachegrind

2012-08-28 Thread Qing Yang
my thread of dial_tone.py. I guess I use Oprofile in the wrong way, could you give me some tips? Sincerely, -- Yang, Qing Information Engineering, CUHK ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] How to utilize multi-thread processor

2012-08-27 Thread Qing Yang
rogram. 2) Inside some blocks, we extensively use vector multiplications (e.g., precoding, CFO compensation). I've heard about the use of SSE to boost the speed of vector multiplication. How can I utilize this technology in my program? Best regards, -- Yang, Qing Inform

Re: [Discuss-gnuradio] Profiling GNU Radio flow graphs

2012-08-27 Thread Qing Yang
12.1.so libc-2.12.1.so _IO_vfscanf 163 0.0744 ibus-daemon ibus-daemon /usr/bin/ibus-daemon ... I can't find my thread of dial_tone.py. I guess I use Oprofile in the wrong way, could you give me some tips? Sincerely, -- Yang, Qing Information Engineeri

Re: [Discuss-gnuradio] LLLL error printout

2012-08-25 Thread Qing Yang
Hi Josh, I also meet the "L" output. Does this mean the USRP cannot send the packet out in time? What should I do to depress or avoid this error message? Furthermore, can you explain the meaning of "U" and "O" output to the console? -- Yang, Qing Information Engin

Re: [Discuss-gnuradio] Profiling GNU Radio flow graphs

2012-08-23 Thread Qing Yang
Tim, Have you tried this Kcachegrind on GNU Radio flow graphs? Does it works well? I want to see the profile of each gr module (in python). -- Yang, Qing Information Engineering, CUHK 2012/8/24 > Hi all, > > I am currently trying to optimize the performance of my DRM transmitter

Re: [Discuss-gnuradio] Support wideband(20MHz) OFDM transmitting/receiving using RawOFMD and USRP N210

2012-08-08 Thread Qing Yang
the uhd_fft.py to see the signal spectrum, the bandwidth of the benchmark_tx's signal is only 8MHz. I guess the benchmark_tx does not use 20MHz to transmit. -- Yang, Qing Information Engineering, CUHK 2012/8/8 Alex Zhang > Could I know your current achieved bandwidth of OFDM commu

Re: [Discuss-gnuradio] Support wideband(20MHz) OFDM transmitting/receiving using RawOFMD and USRP N210

2012-08-08 Thread Qing Yang
I have enabled the real-time scheduling in my PCs. And my USRPs are connected to PCs via direct link of a Gigabyte ethernet card. I am now trying the volk. -- Yang, Qing Information Engineering, CUHK 2012/8/7 Nathan West > On Tue, Aug 7, 2012 at 10:12 AM, wrote: > >> ** >>

Re: [Discuss-gnuradio] Support wideband(20MHz) OFDM transmitting/receiving using RawOFMD and USRP N210

2012-08-06 Thread Qing Yang
still cannot support 20MHz bandwidth. Does anyone have other solutions such as using parallel signal processing or multi-thread? We have 8-core cpu but we don't know how to fully utilize them using gr. Sincerely, -- Yang, Qing Information Engineering, CUHK 2012/8/7 Alex Zhang > Just stat

[Discuss-gnuradio] Support wideband(20MHz) OFDM transmitting/receiving using RawOFMD and USRP N210

2012-08-06 Thread Qing Yang
E5620 @ 2.40GHz UHD version: UHD_003.004.000-c50bb91 image version 8 gnuradio version: 3.4.x Sincerely, -- Yang, Qing Information Engineering, CUHK ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] Where is the signal of incoming sample in FPGA?

2011-10-30 Thread xi yang
Hi, all, Can I add the FFT after the module fifo_to_gpmc? It gives an output EM_D(15:0) 16bits, an output of data_available. Thanks, Yooxi ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] Where is the signal of incoming sample in FPGA?

2011-10-29 Thread xi yang
Hi, All, We wrote codes for FFT in FPGA. In our codes, we start FFT when we get a START signal. Where can we connect this signal? How do we know that samples are incoming? There are lots of signals in u1e.v that look like having this function, such as input FPGA_RXD, input fpga_rxd1, input db_miso

Re: [Discuss-gnuradio] How can I build component usrp on E100?

2011-10-19 Thread xi yang
> On 19/10/2011 12:41 PM, xi yang wrote: > >> Hi, Marcus and Sean, >> >> I'm a little bit confused by the relationship between UHD and gnuradio. >> I thought we can use either UHD or gnuradio, just UHD provides some unique >> interfaces for the products fro

Re: [Discuss-gnuradio] How can I build component usrp on E100?

2011-10-19 Thread xi yang
able either. SO basically we have to wait for the next release? Thanks, Yooxi 2011/10/19 Marcus D. Leech > On 19/10/2011 11:36 AM, xi yang wrote: > > Hi, all, > > I have updated the kernel modules to 3.0.0 for my USRP E100. > UHD is successfully built and benchmark_rx_rate i

[Discuss-gnuradio] How can I build component usrp on E100?

2011-10-19 Thread xi yang
Hi, all, I have updated the kernel modules to 3.0.0 for my USRP E100. UHD is successfully built and benchmark_rx_rate in uhd/host/build/examples works. I further installed the gnuradio according to the usrpe1xx-FAQhttp://code.ettus.com/redmine/ettus/projects/usrpe1xx/wiki/FAQ $ git clone git://gn

Re: [Discuss-gnuradio] How to update FPGA in E100

2011-08-25 Thread xi yang
Hi, Philip, Thanks! If I got a USRP1, what files do I need to copy to /usr/share/uhd/images ? And that's it? No additional operations? Yooxi 2011/8/25 Philip Balister > On 08/25/2011 03:26 PM, xi yang wrote: > >> Hi, Nick, >> >> Thanks a lot! >> Do you kn

Re: [Discuss-gnuradio] How to update FPGA in E100

2011-08-25 Thread xi yang
ng is in the fpga/usrp2/top/E1x0 > directory. > > --n > > On Wed, Aug 24, 2011 at 9:30 PM, xi yang wrote: > >> Hi, all, >> >> We have made a FPGA FFT module. >> We downloaded the UHD source code from >> https://github.com/EttusResearch/UHD-Mirror/archi

[Discuss-gnuradio] How to update FPGA in E100

2011-08-24 Thread xi yang
Hi, all, We have made a FPGA FFT module. We downloaded the UHD source code from https://github.com/EttusResearch/UHD-Mirror/archives/master We modified the usrp_std.v under fpga/usrp1/toplevel/usrp_std/ to link our FFT module between rx_buffer and USB. We have successfully compiled the usrp_std.qp

Re: [Discuss-gnuradio] The format of I/Q sample

2011-08-15 Thread xi yang
? It's better if we can have a look at the conversion file. Thanks, Yooxi 2011/8/15 Tom Rondeau > On Mon, Aug 15, 2011 at 12:48 AM, xi yang wrote: > > Hi, all > > > > I want to use fpga to do FFT before the data are transmitted to usb. > > > > In FFT module

[Discuss-gnuradio] The format of I/Q sample

2011-08-14 Thread xi yang
Hi, all I want to use fpga to do FFT before the data are transmitted to usb. In FFT module, I used float point numbers to be its input. According to the IEEE Floating-Point Standard, a float point number is represented by 32 bits (bits 0 through 22 form the mantissa, bits 23 through 30 form the e

Re: [Discuss-gnuradio] how to trigger dynamic reconfiguration with lock/disconnect

2011-06-01 Thread Yang
Got it. I will try it out. Thanks! -- Yang Sent with Sparrow On 2011年6月2日星期四 at 上午11:35, Marcus D. Leech wrote: > On 06/01/2011 11:07 PM, Yang wrote: > > Would you like to expand it in detail or refer me to some places I can > > look for? Dose this need 2 antennas on 1 daughter

Re: [Discuss-gnuradio] how to trigger dynamic reconfiguration with lock/disconnect

2011-06-01 Thread Yang
and start tx side to transmit with the sensing result. I see you mention your rx and tx chains running at the same time, is it possible? -- Yang Sent with Sparrow On 2011年6月2日星期四 at 上午10:29, Marcus D. Leech wrote: > On 06/01/2011 10:10 PM, Yang wrote: > > Oh, my problem is the same w

Re: [Discuss-gnuradio] how to trigger dynamic reconfiguration with lock/disconnect

2011-06-01 Thread Yang
Would you like to expand it in detail or refer me to some places I can look for? Dose this need 2 antennas on 1 daughterboard? It would be great if I can build a graph with rx path and tx path and run 2 paths simultaneously. -- Yang Sent with Sparrow On 2011年6月2日星期四 at 上午11:04, Marcus D

Re: [Discuss-gnuradio] how to trigger dynamic reconfiguration with lock/disconnect

2011-06-01 Thread Yang
(), wait(), stop() of theirs orderly. This is a dumb solution (pretty dumb actually), but maybe it could your reference, so I write this down to you. -- Yang Sent with Sparrow On 2011年5月31日星期二 at 下午6:01, Johannes Schmitz wrote: > Hello Yang, > Do you have any specific questions? > B

Re: [Discuss-gnuradio] Unexpected energy peak sensing thermal noise and using usrp_spectrum_sense.py

2011-05-30 Thread Yang
I dont know if this helps. I once ran spectrum_sense.py and also got peak spur at the first several fft points. I think it might relate to the hardware communication between PC and USRP at the initial stage. -- Yang Sent with Sparrow On 2011年5月26日星期四 at 下午4:14, Lebowski80 wrote: > > Tha

Re: [Discuss-gnuradio] Unexpected energy peak sensing thermal noise and using usrp_spectrum_sense.py

2011-05-30 Thread Yang
I dont know if this helps. I once ran spectrum_sense.py and also got peak spur at the first several fft points. I think it might relate to the hardware communication between PC and USRP at the initial stage. -- Yang Sent with Sparrow On 2011年5月26日星期四 at 下午4:14, Lebowski80 wrote: > >

Re: [Discuss-gnuradio] how to trigger dynamic reconfiguration with lock/disconnect

2011-05-30 Thread Yang
store parameters that needs to be changed. It works well in most of time, but throw errors like "usrp2::samples() not receiving" in a few times. I am interested in what you guys are discussing about, though something of it seems pretty abstract and vague to me. -- Yang Sent with

Re: [Discuss-gnuradio] How to speed up spectrum sensing?

2011-05-26 Thread Yang
retune or not? Because if I do not it only sense a very narrow band. -- Yang Sent with Sparrow On 2011年5月27日星期五 at 上午4:15, devin kelly wrote: > Changing the fft size won't change your sensing time that much unless the > machine you're using is really slow or the fft size is outr

Re: [Discuss-gnuradio] data from flow graph is not updated

2011-05-22 Thread Yang
what do you mean updated? Where and when do you print the data? If you print it after the block stops, the data will not change anyway. -- Yang Sent with Sparrow On 2011年5月22日星期日 at 下午10:13, lishan_wh wrote: > Hi, all > I met a problem when I tried to read data from USRP. I hope someo

Re: [Discuss-gnuradio] debugging code for seeing what threads are created

2011-05-22 Thread Yang
cause the threads are conflicted with each other? -- Yang Sent with Sparrow ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] Store data with usrp_spectrum_sense.py

2011-05-21 Thread yulong yang
Hi, maybe you can try to catch them into a file, you know, write python script like f.open() and f.write(), that stuff. You can google it for its usage. Hope this helps. On Sun, May 22, 2011 at 2:04 AM, Miguel Angel Sanz Rodriguez < mikys...@hotmail.com> wrote: > Hi everyone, > I am new in GNUr

[Discuss-gnuradio] How exactly dose rx_callback work in benchmark script?

2011-05-21 Thread yulong yang
Hi all, I have been reading the benchmark_rx.py codes.I want to add the channel sensing and selecting in callback function. I understand rx_callback in benchmark_rx is a function that make the block wait for packet generating from the data that received from the receive_path while running. But ho

Re: [Discuss-gnuradio] Implementation of dynamic spectrum access

2011-05-20 Thread Yang
of spectrum_sense.py seems to be perfect. Cheers, -- Yang Sent with Sparrow On 2011年5月10日星期二 at 上午9:57, adib_sairi wrote: > > > > Yang-56 wrote: > > > > Ah, I got it. I will look into that. > > > > Btw, generally speaking, how is the efficiency the spec

[Discuss-gnuradio] How to speed up spectrum sensing?

2011-05-13 Thread Yang
improvement. My goal is to sense 4MHz in 10ms or so. I am wondering any ideas to improve the speed? Or is there any other ways to sense faster? Any help would be appreciated! Thank you. -- Yang Sent with Sparrow ___ Discuss-gnuradio mailing list Discuss

Re: [Discuss-gnuradio] Implementation of dynamic spectrum access

2011-05-10 Thread Yang
of spectrum_sense.py seems to be perfect. Cheers, -- Yang Sent with Sparrow On 2011年5月10日星期二 at 上午9:57, adib_sairi wrote: > > > > Yang-56 wrote: > > > > Ah, I got it. I will look into that. > > > > Btw, generally speaking, how is the efficiency the spec

Re: [Discuss-gnuradio] Implementation of dynamic spectrum access

2011-05-09 Thread Yang
Ah, I got it. I will look into that. Btw, generally speaking, how is the efficiency the spectrum sensing in gnu radio? I use the spectrum_sense.py to sense 9M a step and generate 256 bins which takes me nearly 1 second to sense 1M. It is really slow... -- Yang Sent with Sparrow On 2011年5月8日星期

Re: [Discuss-gnuradio] Implementation of dynamic spectrum access

2011-05-09 Thread Yang
Hey Adib, thanks for the information, I will look into your publications. -- Yang Sent with Sparrow On 2011年5月9日星期一 at 上午9:00, adib_sairi wrote: > > Dear Yang, > > My master work is on this topic. I have a recent paper on this which as > below, > > M. Adib Sarijari, Rozeh

Re: [Discuss-gnuradio] USRP2 on switch?

2011-05-08 Thread Yang
it seems every usrp2 must have a ethernet number and a MAC address, so I think the connecting with switch might not work...? -- Yang Sent with Sparrow On 2011年5月8日星期日 at 下午6:29, Stefan Gofferje wrote: > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA1 > > Hi, > > that

Re: [Discuss-gnuradio] Implementation of dynamic spectrum access

2011-05-08 Thread Yang
nerate, but why it starts to wait after the packet is generated? -- Yang Sent with Sparrow On 2011年5月8日星期日 at 下午5:34, Tom Rondeau wrote: > On Sun, May 8, 2011 at 2:03 AM, yulong yang wrote: > > Thanks for reply. > > My plan is to extend the usrp_spectrum_sense.py: grab its outp

Re: [Discuss-gnuradio] Implementation of dynamic spectrum access

2011-05-07 Thread yulong yang
one, file transmitter, would run after the first one stops. Is this possible? When you say threading, do you mean two top_block? Speaking of DySPAN, I will look into that. Really thanks. On Sat, May 7, 2011 at 8:55 PM, Tom Rondeau wrote: > On Fri, May 6, 2011 at 4:34 PM, Yang wrote: >

[Discuss-gnuradio] Implementation of dynamic spectrum access

2011-05-06 Thread Yang
into and get work done. I believe there should be some quite simple and straightforward way to realize DSA. Would anyone point a way for me to go? Any help would be appreciated. Thank you. -- Yang Sent with Sparrow ___ Discuss-gnuradio mailing list

[Discuss-gnuradio] Problem in Implementation of dynamic spectrum access

2011-05-04 Thread Yang
, but if I want to demonstrate the time slots and timing control, how could I realize them? I think there might be some kind of process.run() and process.repeat() or some thing, but I cannot find them. Thank you in advance. This is crucial to me. -- Yang Sent with Sparrow

[Discuss-gnuradio] How to add my own block onto GRC in MAC OS X?

2011-04-26 Thread Yang
. Thank you. I would appreciate any help. -- Yang Sent with Sparrow ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] "ImportError: No module named myblock" when generating py file in GRC

2011-04-21 Thread Yulong Yang
Hi, I try to add all it needs to put my custom block into this module. I add the corresponding .xml/.cc/.h/.i files into grc/lib/swig folder separately and modify MakeFile.am files in each folders. However, it still cannot work. When generating top_block.py in GRC, the console says: self.m

Re: [Discuss-gnuradio] "ImportError: No module named myblock" when generating py file in GRC

2011-04-20 Thread Yulong Yang
11-04-20 at 16:43 -0700, Josh Blum wrote: > > On 04/20/2011 04:42 PM, yulong yang wrote: > > On Thu, Apr 21, 2011 at 7:17 AM, Josh Blum wrote: > > > >> > >> > >> On 04/20/2011 03:00 AM, Yulong Yang wrote: > >>> Hello, > >>> > &

Re: [Discuss-gnuradio] "ImportError: No module named myblock" when generating py file in GRC

2011-04-20 Thread yulong yang
On Thu, Apr 21, 2011 at 7:17 AM, Josh Blum wrote: > > > On 04/20/2011 03:00 AM, Yulong Yang wrote: > > Hello, > > > > I am new to GNU radio. I am trying to write a simple block and add it to > > GRC. All steps before are fine. However, when I generate t

[Discuss-gnuradio] "ImportError: No module named myblock" when generating py file in GRC

2011-04-20 Thread Yulong Yang
Hello, I am new to GNU radio. I am trying to write a simple block and add it to GRC. All steps before are fine. However, when I generate the top_block.py file, it says "ImportError: No module named myblock". The myblock is actually the name of the folder I create to put all necessary files of my

[Discuss-gnuradio] (no subject)

2011-04-05 Thread Yulong Yang
Hi all, I have been trying to generate (from a random 0-1 source) and send a simple QAM signal from one side, receive and save as .dat file in another. Then I try to recover the signal I sent in Matlab/Octave. My method is to first use read_complex_binary() to extract points, and sample 2000 of

Re: [Discuss-gnuradio] User Generated Signals

2011-03-28 Thread Yulong Yang
Hello, I am a senior student that also studying GNU Radio. I have found your post about generating signal and transmit on gnuradio mailing list (though it is written in 2007). I am wondering if you could give me some hints on generating signal and transmit using USRP? I am new to gnu radio and ha

[Discuss-gnuradio] USRP2 ethernet port change

2011-02-05 Thread Shuo Yang
Hi, I am trying to connect USRP2 with GNU Radio in Ubuntu operating system, but the default ethernet port for USRP2 is eth0 but my computer is eth5 so do you know how to change the default ethernet of computer to eth0, thanks in advance! Best Wishes! -- Shuo Yang

[Discuss-gnuradio] cannot detect USRP2 on ubuntu 9.10 whatsoever...various solutions adopted...

2010-12-20 Thread yulong yang
Hi all, I am new to gnuradio and stuck with the usrp2 connection for several days... I looked up tens of search results but no solution yet. Therefore I post my problem and hope someone could give me a hand: I am running gnu radio 3.2.2 on ubuntu9.10, and I think gnuradio works fine because dial_

[Discuss-gnuradio] Re: lots of "S" in output

2009-10-08 Thread Yang-Chieh Fan
frequency channels self.connect (self.u, self.src_fft) This is done inside the def build_gui Thanks, 2009/10/9 Yang-Chieh Fan > Hi, > > Hardware: USRP2, Tuner Card > > I am trying to run a FM receiver to receiver a FM station on my right > speaker and another on my

[Discuss-gnuradio] lots of "S" in output

2009-10-08 Thread Yang-Chieh Fan
Hi, Hardware: USRP2, Tuner Card I am trying to run a FM receiver to receiver a FM station on my right speaker and another on my left speaker. Im able to do this successfully. However when I integrate this function into a GUI interface to display the fft being received, my FM audio has lots of ji

Re: [Discuss-gnuradio] loss of packets during reception

2009-08-23 Thread Yu-Hua Yang
theres some threads about this, u should take a look from what i gather, the loss of packets occurring at the end of transmission is due to the transmitting USRP shutting off too early, theres a delay from sending it and it actually being in the air and then receiving it, and because it shut off b

[Discuss-gnuradio] RS232 level shifter on RX/TX boards

2009-08-18 Thread Yang-Chieh Fan
Dear Ettus Team, I was wondering if you would be able to tell me the exact model of the RS232 chips that are used on the BasicRX and BasicTX daughterboards for the USRP1 and USRP2 boards. Myself and my team member are currently working on an RFID-based project at The University of Adelaide, utili

Re: [Discuss-gnuradio] CUDA-Enabled GNURadio gr_benchmark10 possible improvements

2009-07-07 Thread Yu-Hua Yang
any help? 2009/7/2 Yu-Hua Yang > > > -- Forwarded message -- > From: Yu-Hua Yang > Date: 2009/7/2 > Subject: Re: [Discuss-gnuradio] CUDA-Enabled GNURadio gr_benchmark10 > possible improvements > To: Martin DvH > Cc: discuss-gnuradio > > &

Re: [Discuss-gnuradio] CUDA-Enabled GNURadio gr_benchmark10 possible improvements

2009-07-01 Thread Yu-Hua Yang
I believe is the core of cuda_fir_filter, it seems you are using shared memory right? Just making sure we are not using global or local memory which would disastrously slow down the CUDA computations. Thank you again for taking the time to help me! 2009/7/1 Martin DvH > On Wed, 2009-07-01 at 05

Re: [Discuss-gnuradio] CUDA-Enabled GNURadio gr_benchmark10 possible improvements

2009-07-01 Thread Yu-Hua Yang
On Tue, 2009-06-30 at 02:52 -0400, Yu-Hua Yang wrote: > > Upon a closer look into cuda_muiltiply_const_ff_kernel.cu, there > > exists 5 different kernel functions to do the multiplication, where > > the default one, > > > > __global__ void > > cu

Re: [Discuss-gnuradio] CUDA-Enabled GNURadio gr_benchmark10 possible improvements

2009-06-29 Thread Yu-Hua Yang
Upon a closer look into cuda_muiltiply_const_ff_kernel.cu, there exists 5 different kernel functions to do the multiplication, where the default one, __global__ void > cuda_multiply_const_ff_kernel(const float* g_idata, float* g_odata,const > int noutput_items,const float konst) > is completely

Re: [Discuss-gnuradio] CUDA GPU Vs CELL BE

2009-06-29 Thread Yu-Hua Yang
Thanks 2009/6/29 Eric Blossom > On Mon, Jun 29, 2009 at 05:21:29PM +0200, Vincenzo Pellegrini wrote: > > Hi everybody, > > I have recently had a look at two possibilities for SWRadio-aimed > intensive > > computing, > > which i guess are the two main development lanes for our kind of stuff: > >

[Discuss-gnuradio] CUDA-Enabled GNURadio gr_benchmark10 possible improvements

2009-06-29 Thread Yu-Hua Yang
Hi Has anyone able to successfully improve CUDA-Enabled GNURadio's performance? At the moment I am very new at this stuff so I am just looking at Martin's code without any really solid understanding. I know that the gr_benchmark10_test.py performance is slow computing on GPU due to the over-head m

[Discuss-gnuradio] CUDA-Enabled Gnuradio Error in cudaMemcpy()

2009-06-25 Thread Yu-Hua Yang
Hi After some struggle I managed to build CUDA-Enabled GNURadio, without IIR filters ( they were giving me alot of build problems so I commented them out in Makefiles and others) However, after I ran the test to see if it worked: #time ./gr_benchmark10_test.py -c && time ./gr_benchmark10_test.py

[Discuss-gnuradio] Re: Building CUDA with GNUradio issues

2009-06-25 Thread Yu-Hua Yang
I solved the issue It wasnt a compatibility issue. I was able to build with gcc/g++ 4.3 that came with F10. The problem is the file: msdd_source_simple.cc is missing a #include Recommend adding that to the SVN repository. 2009/6/24 Yu-Hua Yang > Hi > > I am having alot of problems

[Discuss-gnuradio] Building CUDA with GNUradio issues

2009-06-24 Thread Yu-Hua Yang
Hi I am having alot of problems building CUDA with the current CUDA-enable GUNRadio branch. I am using Fedora 10. I followed the http://www.smallwhitecube.com/php/dokuwiki/doku.php?id=howto:gnuradio-with-cudawiki and everything is fine up until trying to 'make' gpgpu-wip I understand that we may

[Discuss-gnuradio] GnuRadio and CUDA

2009-06-19 Thread Yu-Hua Yang
Continuing from this thread http://lists.gnu.org/archive/html/discuss-gnuradio/2008-11/msg00293.html Has there been any progress made since 2008? Thank you ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/

[Discuss-gnuradio] Passing the payload to the application level (to GUI display)

2009-06-15 Thread Yu-Hua Yang
Hi, I found a similar thread here http://lists.gnu.org/archive/html/discuss-gnuradio/2006-09/msg00205.html but the suggested solution doesnt seem to work well with what I am trying to do. All i am trying to do is take the received packet information print "ok = %5s pktno = %4d n_rcvd = %4d n

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