[Discuss-gnuradio] The latency between TX and RX

Hi All, When I use benchmark_ofdm_tx.py and benchmark_ofdm_rx.py to transmit and receive, I found that the transmitter side is faster than the receiver side. For example, I give a small pkt size, say s=1200, and a large file size, say M=5. When benchmark_ofdm_tx.py finished transmitting, at the r

[Discuss-gnuradio] USRP2-No USRPs found on interface eth0

Hi All, I'm testing my USRP2. I run ./usrp2_fft.py and ./usrp2_wfm_rcv.py, both worked fine. However, I got an error now, "RuntimeError: No USRPs found on interface eth0". I didn't change anything on this computer. I connect the USRP2 on another computer, all work fine. Could anyone advise me on

Re: [Discuss-gnuradio] USRP2-No USRPs found on interface eth0

ould fix this problem. > > Last idea is if you've tried the VRT firmware/gnuradio code on the other > PC > -- the control packets have changed in this release so wont work with > stock > git/packaged gnuradio versions. > > Cheers, > > Tim > > On Wed, Jan 27, 2010

[Discuss-gnuradio] Daughterboard

Hi All, When we use any of the USRP daughterboard to transmit, do we need the authorization? For example, FRX900 includes the cell phone bands in US. If we use FRX900 to transmit, do we violate the FCC rule? Or, we could legally use any daughterboard on any band that falls in the frequency range

[Discuss-gnuradio] installatino error

Hi All, I am trying to install gnuradio-3.2.1 on Ubuntu-8.04 OS. There is no error for configure, but there are errors when "make". libqwtplot3d-qt4 and libqwtplot3d-qt4-dev have been installed. Can anyone tell me how to solve it? Thanks in advance, Brook === Errors === /usr/include/qwt/qwt_aut

Re: [Discuss-gnuradio] installatino error

Hi All, I also tried other version of gnuradio, such as gnuradio-3.1.2, 3.2.2, but I got the same errors when "make". I just upgraded qwt-5.0.2 to qwt-5.2.1, but no help. Any suggestion here? Thanks, Brook Brook Lin wrote: > > Hi All, > > I am trying to install gnuradi

Re: [Discuss-gnuradio] installatino error

it in the configure, build, install. > > -JOsh > > On 08/03/2010 02:15 PM, Brook Lin wrote: >> >> Hi All, >> >> I also tried other version of gnuradio, such as gnuradio-3.1.2, 3.2.2, >> but I >> got the same errors when "make". I just upgr

Re: [Discuss-gnuradio] installatino error

I got it. Everything works fine. Thanks, Josh. Brook Josh Blum-2 wrote: > > Unless you had a specific use in mind for the qt stuff, you probably > wont need it. I would just disable it in the configure, build, install. > > -JOsh > > On 08/03/2010 02:15 PM, Brook Li

[Discuss-gnuradio] Gnuradio-3.3.0 on Ubuntu-10.04

Hi All, I followed the instructions on http://gnuradio.org/redmine/wiki/gnuradio/UbuntuInstall to install gnuradio-3.3.0 onto Ubuntu-10.04 LTS. I used qwt-5.2.1, boost_1_37_0, and all other packages from synaptic package manager. After ./configure --with-boost=$BOOST_PREFIX, I got: The followin

Re: [Discuss-gnuradio] Gnuradio-3.3.0 on Ubuntu-10.04

e? Thanks, Brook Elvis Dowson wrote: > > Hi, > > On Aug 25, 2010, at 10:28 PM, Brook Lin wrote: > >> I also found that there is nothing >> under directory /usr/local/lib/python2.6/site-packages. How should I fix >> this problem? Can anyone give me some advice?

Re: [Discuss-gnuradio] Gnuradio-3.3.0 on Ubuntu-10.04

v? > > http://k1vzx.com/mediawiki/index.php?title=USRP:_Software_Setup > > ~JeffL > > On 8/25/2010 3:28 PM, Brook Lin wrote: >> >> Hi All, >> >> I followed the instructions on >> http://gnuradio.org/redmine/wiki/gnuradio/UbuntuInstall to install >> gn

Re: [Discuss-gnuradio] Gnuradio-3.3.0 on Ubuntu-10.04

Thanks, Eric. >Is your PYTHONPATH set to /usr/local/lib/python2.6/dist-packages? >Is your PYTHONPATH exported? I'm not sure on these two questions. I installed python2.6 from synaptic package manager, I thought it should set the path right. If not, could you please tell me how to set PYTHONPATH

Re: [Discuss-gnuradio] Gnuradio-3.3.0 on Ubuntu-10.04

quot;credits" or "license" for more information. >>> from gnuradio import gr >>> from gnuradio import usrp >>> from gnuradio import audio >>> Thanks, Brook Eric Blossom wrote: > > On Wed, Aug 25, 2010 at 02:21:27PM -0700, Brook Lin wrote:

Re: [Discuss-gnuradio] Gnuradio-3.3.0 on Ubuntu-10.04

Thanks, Marcus. I tried usrp_fft.py and got the same error. I also tried dial_tone.py under /gnuradio-example/python/audio, but I got the similar error: Traceback (most recent call last): File "./dial_tone.py", line 24, in from gnuradio import audio File "/usr/lib/python2.6/dist-package

Re: [Discuss-gnuradio] Gnuradio-3.3.0 on Ubuntu-10.04

Thanks, Eric. You are right. I found that python-gnuradio-core was installed from synaptic package manager. Now, everything works fine. Thanks, all. - Brook Eric Blossom wrote: > > On Wed, Aug 25, 2010 at 04:03:59PM -0700, Brook Lin wrote: >> >> Thanks, Marcus. >> &g

[Discuss-gnuradio] Connect two WBX daugterboards

Hi All, I am using two USRP N210 with WBX. Can I connect two WBX with cable directly? Or I need an attenuator between them. If so, what kind of attenuator I need. Thanks in advance, Brook -- View this message in context: http://old.nabble.com/Connect-two-WBX-daugterboards-tp31408439p31408439.

[Discuss-gnuradio] Destination Host Unreachable

Hi ALL, I am using Ubuntu 10.04 and installing the latest gnuradio download via git clone http://gnuradio.org/git/gnuradio.git. To enable USRPN210+WBX, I also follow the steps (http://www.ettus.com/uhd_docs/manual/html/build.html#build-instructions-unix) to build and install the UHD. However,

[Discuss-gnuradio] Data link protocol problem

Hello ALL, I am using Ubuntu-10.04 and the latest gnuradio downloaded via git. UHD has been installed. However, I get 'Destination Host Unreachable' when ping 192.168.10.2 $ sudo ifconfig eth0 192.168.10.1 $ ping 192.168.10.2 PING 192.168.10.2 (192.168.10.2) 56(84) bytes of data. >From 192.168.1

[Discuss-gnuradio] qam constellation problem

Hi All, I am plotting the constellation plot for qam8 before and after the root raised cosine filter. Why I didn't get clear 8 dots constellation before the root raised cosine filter (plotted from the data saved by chunks2symbols.dat)? For both constellation before (data saved by chunks2symbols.d

Re: [Discuss-gnuradio] qam constellation problem

BTW, I also got more fuzzy 16 points save by chunks2symbols.dat before the filter. Could anyone help me explain it? Thanks, Brook Brook Lin wrote: > > Hi All, > > I am plotting the constellation plot for qam8 before and after the root > raised cosine filter. Why I didn

Re: [Discuss-gnuradio] qam constellation problem

fore rrc filter and after self.chunks2symbols? Thanks so much, Brook http://old.nabble.com/file/p31639677/dqpsk_before_filter.png Tom Rondeau wrote: > > On Mon, May 16, 2011 at 9:23 PM, Brook Lin wrote: > >> >> Hi All, >> >> I am plotting the constellation plot for qam

Re: [Discuss-gnuradio] Intermediate frequency question

Hi All, I am confused on this reply. The reply said that "With the RFX2400, and most of the high frequency usrp daughtercards, there is no IF frequency". How is that possible? For RFX2400 the RF range is from 2.3GHz to 2.9GHz, the ADC rate for USRP1 is 64MS/s. If there is no IF frequency, the AD

Re: [Discuss-gnuradio] Intermediate frequency question

Hi All, I am confused on this reply, posted on http://old.nabble.com/Intermediate-frequency-question-td23514126.html#a32598120 http://old.nabble.com/Intermediate-frequency-question-td23514126.html#a32598120 . The reply said that "With the RFX2400, and most of the high frequency usrp daughtercard

[Discuss-gnuradio] How to define wait() if the class is object rather than gr_top.block?

Dear All, In radar_mono.py file, class radar_rx(gr.top_block) and class radar_tx(object) are defined. I would like to add a wait() function for both radar_rx and radar_tx. In class radar_rx(gr.top_block), radar_rx is under gr.top_block class, so I can define wait() as: def rx_wait(self):

Re: [Discuss-gnuradio] install OFDM

Hello Fernando Perez-5, I am trying to install OFDM too. Do you have any clue on how to include those OFDM files to your system? Thanks, Brook -- View this message in context: http://www.nabble.com/install-OFDM-tp20065473p20348808.html Sent from the GnuRadio mailing list archive at Nabble.co

[Discuss-gnuradio] How to include OFDM package?

Hi All, I am going to TX/RX using OFDM. However, I am using Ubuntu 8.04 and Gnuradio3.1.1, there is no OFDM package included. How should I include the OFDM package? Thanks, Brook -- View this message in context: http://www.nabble.com/How-to-include-OFDM-package--tp20349025p20349025.html Sent

[Discuss-gnuradio] Question on Boost - could not detect the boost libraries (version 1.35 or higher)

Hi All, I am trying to install gnuradio from trunk (svn co http://gnuradio.org/svn/gnuradio/trunk). Before that I download boost_1_36_0 from boost.sourceforge.net, and install boost_1_36_0 first. ~$ cd boost_1_36_0/ ~/boost_1_36_0$ BOOST_PREFIX=/opt/boost_1_36_0 ~/boost_1_36_0$ ./configure -

[Discuss-gnuradio] ImportError: libgruel.so.0: cannot open shared object file: No such file or directory

Hi All, I'm using Ubuntu8.04 and trunk version 10200. After installation, I tried to run ./usrp_benchmark_usb.py. However, I got the error like this: Traceback (most recent call last): File "./usrp_benchmark_usb.py", line 30, in from gnuradio import gr File "/usr/local/lib/python2.5/sit

[Discuss-gnuradio] How to allow random subcarriers in OFDM?

Hi All, For the OFDM, the fft_length is the total number of subcarriers, and the occupied_tones is the total number of subcarriers that carry actual data, which are in the middle of total subcarriers. However, I want to make the subcarriers randomly on or off, which means, the occupied_tones ar

[Discuss-gnuradio] Question on OFDM

Hi All, I am working on OFDM. I use benchmark_ofdm_tx.py and benchmark_ofdm_rx.py to transmit and receive data right now. ./benchmark_ofdm_tx.py -f 440M -T A --tx-amplitude 5000 -v -i 128 --fft-length 128 --occupied-tones 80 --cp-length 32 ./benchmark_ofdm_rx.py -f 440M -R A -v -d 64 --fft-lengt

Re: [Discuss-gnuradio] ofdm benchmark

I think you could change the value of -d and -i and see. This is what I tried. ./benchmark_ofdm_tx.py -f 440M -T A --tx-amplitude 5000 -v -i 128 --fft-length 128 --occupied-tones 80 --cp-length 32 ./benchmark_ofdm_rx.py -f 440M -R A -v -d 64 --fft-length 128 --occupied-tones 80 --cp-length 32 A

[Discuss-gnuradio] How to write the payload to a named pipe?

Hi All, I am doing video transmission using OFDM. At the receiver side, I save payload to a file, meanwhile, use VLC to access this file to play the video. However, VLC stops play the content while it reaches to the end of the file, and does not wait for the continuosly coming payload. Is that p

[Discuss-gnuradio] Broken pipe when I write the payload to a pipe.

Hi All, I am trying to write the payload to a pipe rather than to a file in benchmark_ofdm_rx.py. The script is attached below. However, I got the error 'Broeken pipe' when I run the script. Can anyone tell me why is that and how to correct it? rxdata.append(payload[2:]) #os.mkfifo('pipe') myfi

Re: [Discuss-gnuradio] Broken pipe when I write the payload to a pipe.

tor: Modulation Type: bpsk FFT length: 128 Occupied Tones: 100 CP length:32 TIMEOUT ok: True pktno: 1n_rcvd: 1 n_right: 1 sh: pipe: not found Brook Lin wrote: > > Hi All, > > I am trying to write the payload to a pipe rather than to a file in >

[Discuss-gnuradio] Questions on gr_ofdm_mapper_bcv.*

Hi All, I saved gr_ofdm_mapper_bcv.* files as other name say gr_new_ofdm_mapper_bcv.* in the same directry, because I need some modification based on these later. After that, I did /gnuradio/gnuradio-core/src/lib$ make /gnuradio/gnuradio-core/src/lib$ sudo make install I don't know whether I nee

[Discuss-gnuradio] What is occupied_tones concept?

Hi All, I am working on OFDM. The current OFDM implementation uses occupied_tones concept. Could anyone tell me what the occupied_tones concept is? How to get rid of the occupied_tones concept eventually? Thanks, Brook -- View this message in context: http://www.nabble.com/What-is-occupied_ton

[Discuss-gnuradio] Questino on Gnuradio as the client and VLC as the server

Hi All, I am using USRP to receive video streaming, and feed the data to a socket as the client. Then, I open a vlc as the server to open the network stream via UDP. The code is shown below. # the server vlc udp://@:2002 # the client, which is inserted into benchmark_rx.py in /gnuradio-example/

[Discuss-gnuradio] Terminate the receiver

Hi All, I am working on the OFDM project. When I run sudo ./benchmark_ofdm_rx_video.py -f 450M -R A -v -d 32 --fft-length 128 --occupied-tones 100 --cp-length 32, I want to terminate the process if the pktno>100. I tried: def main(): def rx_callback(ok, payload): global

[Discuss-gnuradio] Terminate the receiving process.

Hi All, I am using benchmark_tx.py and benchmark_rx.py to transmit and receive a file. At the benchmark_tx.py, by setting the value of -M, the transmitter process is terminated when the total transmitting packages size is larger than M*1e6. When the transmitter stops, the receiver stops receiving

[Discuss-gnuradio] Question on gr.wavfile_source

Hi All, I'm trying to transmit a wave file using gr.wavfile_source(). To test my transmission path, I first transmit a sine wave, and I can receive it and sink it to sound card fine. I can hear the sound at the receiver side. However, if I change the source using gr.wavfile_source(), I can hear

Re: [Discuss-gnuradio] Question on gr.wavfile_source

Thanks Martin for your reply. I gave a larger gain, but still doesn't work. And I think I was using AM modulation in my tx_path, wasn't it? And I used usrp_am_mw_rcv.py to receive my transmitted signal. Should I use gr.interp_fir_filter_fff() on the transmitter side for am modulation? Are the para

[Discuss-gnuradio] TIMEOUT on OFDM

Hi All, I am testing OFDM transmission. When I transmit from a file using benchmark_ofdm_tx.py, I can receive 75% pkt at the receiver side using banchmark_ofdm_rx.py, and all of them are right. When I stream the input data to a port via UDP, and let benchmark_ofdm_tx.py get data from this port a

[Discuss-gnuradio] Transmission power on each subcarrier

Hi All, I am working on OFDM based on benchmark_ofdm_tx.py and benchmark_ofdm_tx.py. Can anyone give me some hint on how to adjust transmission power on each subcarrier, please? If I set --tx-amplitude, it will be applied on all the subcarriers, however, I want different subcarrier with differen

[Discuss-gnuradio] CDMA in GNURadio

Hi All, Does anyone experiment with CDMA via GNU Radio? I am trying to implement CDMA via GNURadio. How and where should I start? Thanks in advance. -Brook -- View this message in context: http://www.nabble.com/CDMA-in-GNURadio-tp26067547p26067547.html Sent from the GnuRadio mailing list archi

Re: [Discuss-gnuradio] CDMA in GNURadio

Thanks for your reply, Brian. Is there any examples that I can reference? Thanks, Brook Brian Padalino wrote: > > On Mon, Oct 26, 2009 at 5:00 PM, Brook Lin wrote: >> >> Hi All, >> >> Does anyone experiment with CDMA via GNU Radio? I am trying to implement

Re: [Discuss-gnuradio] CDMA in GNURadio

s possible for implementing the MC-CDMA. Can I apply the same synchronization method for OFDM into MC-CMDA? Please advise me. Thanks, Brook Brian Padalino wrote: > > On Mon, Oct 26, 2009 at 6:31 PM, Brook Lin wrote: >> >> Thanks for your reply, Brian. Is there any examples t

[Discuss-gnuradio] Question on howto-write-a-block

Hi All, I am building a signal processing block following the tutorial under the directory /gnuradio/gr-howto-write-a-block, say 'howto_code' block. I've created howto_code.h and howto_code.cc file under /gnuradio/gr-howto-write-a-block/src/lib, meanwhile, I modified howto.i and Makefile.am in t

Re: [Discuss-gnuradio] Question on howto-write-a-block

s like its trying to execute howto_code.h (from your path) rather > than adding it to the relevant enviroment variable. > > Cheers, > > Tim > > On Sat, Dec 5, 2009 at 4:29 AM, Brook Lin wrote: > >> >> Hi All, >> >> I am building a signal processing b

[Discuss-gnuradio] Two simple questions

Hi All, I am new here. I met two questions after installing gnuradio-3.1.1. I know they are simple questions, but I really don't know how to fix it and need your help. I am using fc7. I follow the Fedora installation instructions on the website, install every package it mentions. After installing

[Discuss-gnuradio] A simple question!

Hi All, I run gnuradio-3.1.1 on FC7. After installing gnuradio successfully, I tested usrp_fft.py, I got GUI pop-up, and saw the spectrum at given center frequency. However, I got some warning, see below. = sudo ./usrp_fft.py ** (python:13669

[Discuss-gnuradio] Is that possible combining usrp_fft.py and usrp_spectrum_sense.py to do spectrum analysis and observe in GUI in a wider frequency range?

, min_center_freq, and max_center_freq can be set. Do I need to call self._build_gui(vbox) after each updated center frequency? And all will be plotted in one GUI window? Do you have any suggestion on it? I really appreciate! Thanks in advance, Brook Lin -- View this message in context: http://www.nabble.com

Re: [Discuss-gnuradio] Is that possible combining usrp_fft.py and usrp_spectrum_sense.py to do spectrum analysis and observe in GUI in a wider frequency range?

Thanks for your reply and kind reminder, Eric. I think usrp_spectrum_sense.py works fine on my computer without segmentation fault. I observe that there is a set_next_freq() function in usrp_spectrum_sense.py file, which is used to tune the center freq used in set_freq() function, isn't it? The

Re: [Discuss-gnuradio] Is that possible combining usrp_fft.py and usrp_spectrum_sense.py to do spectrum analysis and observe in GUI in a wider frequency range?

I have figured out why it failed to set freq. Now my question is still how can I get one GUI with one plot and show all the spectrum, say all FM stations. Thanks Brook Lin wrote: > > However, by given the lower bound and the upper bound of the freq range, > next_freq can be get and &

[Discuss-gnuradio] RuntimeError: audio_alsa_source

Hi All, I just ran tx_voice and rx_voice.And I wanted to transmit a music and receive it using Basic RX/TX. However, I got the error: $ sudo ./tx_voice.py -f 30M -I music.pcm -T A -v >>> gr_fir_fff: using SSE bits per symbol = 1 Gaussian filter bt = 0.35 Using TX d'board A: Basic Tx Tx amplitude

Re: [Discuss-gnuradio] RuntimeError: audio_alsa_source

Hi Firas, I am using gnuradio3.1.1 Firas A. wrote: > > What is your OS, gnuradio version ? > > Firas, > > > Brook Lin wrote: >> >> Hi All, >> >> I just ran tx_voice and rx_voice.And I wanted to transmit a music and >> receive it usi

Re: [Discuss-gnuradio] RuntimeError: audio_alsa_source

Firas, I am running gnuradio3.1.1 on 64-bit machine, using Fedora7 Firas A. wrote: > > What is your OS Type? (Fedora, Ubuntu, .) > > Firas > > Brook Lin wrote: > > Hi Firas, I am using gnuradio3.1.1 > Firas A. wrote: > > What is your

Re: [Discuss-gnuradio] RuntimeError: audio_alsa_source

Thanks for all your suggestions. I tried this today: sudo ./tx_voice.py -f 120M -I plughw:0,0 >>> gr_fir_fff: using SSE gr_buffer::allocate_buffer: warning: tried to allocate 992 items of size 33. Due to alignment requirements 4096 were allocated. If this isn't OK, consider padding your

[Discuss-gnuradio] How to see the envelop of a high freq signal?

Hi All, I am using DBSRX daughterboard now. I want to see the envelop of high freq signal in time domain, say a cell phone signal. Do I need any signal processing blocks besides usrp_oscope.py? Thanks, Brook -- View this message in context: http://www.nabble.com/How-to-see-the-envelop-of-a-hig

[Discuss-gnuradio] the amplitude shown in usrp_fft.py

Hi All, I have a question on the amplitude of usrp_fft.py. How can I print out the max amplitude by given a center frequency. For example, if there is a 99.1MHz FM station, which is detected by RXTV d'board, I can use usrp_fft.py simply detect this signal in frequency domain. Meanwhile, I want to

re[Discuss-gnuradio] al and imaginary parts of signal on oscope

Hi All, I learn that the usrp_oscope.py shows the real and imaginary parts of the complex baseband signal coming from the output DDC. However, is red channel for the real and blue channel for the imaginary? How can I check it? Thanks, Brook -- View this message in context: http://www.nabble.co

[Discuss-gnuradio] Questions on the unit of Y-axis in usrp_oscope.py and usrp_fft.py

Hi Eric and All, I found one of replies sent by Eric said that: >What are the units of the Y axis? They are the output of the digital down converter. They are not calibrated to any particular voltage level. The levels depend on the gain setting too. My first question now is what the unit exac

[Discuss-gnuradio] TV video spectrum

Hi All, I am using TVRX to receive TV signal. I set decimation 8 to give a 8MHz wide frequency band which is larger than TV bandwidth 6MHz. Now I just use a piece of wire as the antenna, however, I think I receive audio spectrum rather than video spectrum. What kind of antenna I should use for ob

[Discuss-gnuradio] Questions on DDC output

Hi All, I found one of replies sent by Eric said that: >What are the units of the Y axis of usrp_oscope? >They are the output of the digital down converter. >They are not calibrated to any particular voltage level. >The levels depend on the gain setting too. My first question now is whet

[Discuss-gnuradio] Question on output of FFT block

Hi All, I am not familiar with Python. I got confused on the output of FFT block. I can record the raw data coming to the USRP. However, I also need the data coming outof FFT block. For example, when usrp_fft.py is running, it calls fftsink2.py and give the spectrum plot. I found that in class ff

[Discuss-gnuradio] How to add a spectrum analyzer GUI window in usrp_spectrum _sense.py file

Hi All, I am not familiar with Python. I want to know how I can add an GUI window to show spectrum, like usrp_fft.py does, in usrp_spectrum_sense.py file. The example of usrp_spectrum_sense gives the m.data and also m.frequency. Can I add GUI to show spectrum and meantime update center frequency

[Discuss-gnuradio] output of gr.argmax & gr.max?

Hi All, I tried to access the output of FFT by using self.dst1 = gr.vector_sink_s() and use gr.argmax_fs(self.fft_size) to find the index of the maximum value. However, I can not get the output, dst1.data(). I attached the code below. Actually, I also want to find the maximum value using dst2 =

Re: [Discuss-gnuradio] output of gr.argmax & gr.max?

And I also want to show this maximum value on the status bar in wxgui, which shows the fft plot in the gnuradio-example. Any suggestion? In short, when I run usrp_fft.py, how can I show the peak value on the wxgui window? Can I do it like what I did now?(I mean the code I attached previously). If

Re: [Discuss-gnuradio] output of gr.argmax & gr.max

our code above). I argue it should be > "-10* > math.log10(self.fft_size)..." > [from Brook Lin] > self.fft_size,-20*math.log10(self.fft_size)-10*math.log10 > (power/self.fft_size)) > Any comments? > > Here is some quick code to display the max index of the

[Discuss-gnuradio] Sense spectrum by usrp_spectrum_sense.py

Hi All, I am using usrp_spectrum_sense.py 1400M 2000M -F 512 -d 16 --tune-delay 1e-3 --dwell-delay 10e-3 to sense the spectrum. In main_loop(tb), I print m.center_freq and m.data. freq_step = 0.75 * usrp_rate=0.75*(64M/16)=3M. So m.center_freq[0]=1401.5M, m.data[0]~m.data[511] are 512 bins co

[Discuss-gnuradio] help on finding the features for cell phone companies

Hi All, I am using USRP to sweep the whole cell phone band and pick up the cell phone signals by spectrum analysis. How about, if I want to separate the signals by different companies? Does anyone have suggestions on how to do it? How can I find the feature in frequency domain for at&t, verizon,

Re[Discuss-gnuradio] al-time video receiving?

Hi All, I am using benchmark_tx.py and benchmark_rx.py to transmit and receive video file. For now, I have a video file to transmit, and at the receiver side, I save the received data to a file, then use a media player to play it. This part works fine. However, how about if I want to do a real-ti

Re: Re[Discuss-gnuradio] al-time video receiving?

Thanks so much. But do you have some tutorial regarding it? How should I start it? Thanks, Brook Lin Lin Huang-2 wrote: > > You may try 'VideoLAN'. It supports IP streaming output and input. Then > you > can make your TX RX as an IP tunnel. > > BR > HUANG Lin

[Discuss-gnuradio] Question on OFDM

200 subcarriers are used. How are these 200 used subcarriers allocated? How I should do if I only want to use the first and the last subcarrier or other specific subcarrier? Thanks, Brook Lin -- View this message in context: http://www.nabble.com/Question-on-OFDM-tp18718309p18718309.html Sent from

[Discuss-gnuradio] pktno of OFDM transmission

Hi All, I am working on digital communication using OFDM. And I tried to run the file in /gnuradio-3.1.2/gnuradio-example/python/ofdm @ TX side: sudo ./benchmark_ofdm_tx.py -f 420M --tx-amplitude 6000 @ RX side: sudo ./benchmark_ofdm_rx.py -f 420M At the TX side, the pktno = 2500, however,

[Discuss-gnuradio] Questions on interference!

he RX side not clear or stop. Can anyone help me on this problem? Thanks, Brook Lin -- View this message in context: http://www.nabble.com/Questions-on-interference%21-tp19209495p19209495.html Sent from the GnuRadio mailing list archive at Nabbl

Re: [Discuss-gnuradio] Questions on interference!

message? Can anyone help me solve it? Thanks, Brook Lin -- View this message in context: http://www.nabble.com/Questions-on-interference%21-tp19209495p19261789.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing

[Discuss-gnuradio] One receiver with two transmitters.

still get video1 from TX1, not from TX2. Could my idea be implemented? Can anyone help me on this problem? Thanks, Brook Lin -- View this message in context: http://www.nabble.com/One-receiver-with-two-transmitters.-tp19318842p19318842.html Sent from the GnuRadio mailing list archive at Nabble.com