[Discuss-gnuradio] Status of GNURadio + GPU (specifically CUDA)

I noticed there was some work in this area being done by Martin Dudok van Heel in the developers branch of the repository. Can anyone comment on what has been done so far in this area and what kind of speeds they are getting now? Thanks in advance, Isaac -- View this message in context: http:/

[Discuss-gnuradio] Simple USRP Interface Code

Hi everyone, I was wondering if anyone has written a small C++ application which is the bare bones required to interface with the URSP. Thanks in advanced, Isaac -- View this message in context: http://www.nabble.com/Simple-USRP-Interface-Code-tp22583894p22583894.html Sent from the GnuRadio m

[Discuss-gnuradio] Hardware Schematics

I have heard that these are available for the USRP. Is this true? If so, where can I find them? Thanks in advance, Isaac -- View this message in context: http://www.nabble.com/Hardware-Schematics-tp22078901p22078901.html Sent from the GnuRadio mailing list archive at Nabble.com. __

[Discuss-gnuradio] OpenBTS Technical Report

I am looking for the openBTS webpage that had the technical details of the 2008 burning man experiment on them. Things like: - 7 simultaneous phone calls at 50% CPU - imsi filtering when they first started up Isaac -- View this message in context: http://www.nabble.com/OpenBTS-Technical-Repor

[Discuss-gnuradio] OpenBTS Technical Repor:

I am looking for the openBTS webpage that had the technical details of the 2008 burning man experiment on them. Things like -- View this message in context: http://www.nabble.com/OpenBTS-Technical-Repor%3A-tp22060820p22060820.html Sent from the GnuRadio mailing list archive at Nabble.com. _

[Discuss-gnuradio] Customization of FFT display via C or C++

Is it possible to modify the existing FFT Graphical Sink code to display time domain data on user defined axis. I would like to create some custom axis plots that display the PSD of the signal and optionally allow the user to retune, decimate, and subband tune by right mouse clicking and selectin

[Discuss-gnuradio] US Spectrum Allocation Details

Hi, I am looking for a detailed spectrum allocation guide for the US. Im not talking the default "US Frequency Allocations Chart." but something more like a book or guide. Does such a thing exist? Thanks in advance, Isaac -- View this message in context: http://www.nabble.com/US-Spectrum-A

[Discuss-gnuradio] Does OpenBTS compile

Has anyone gotten the openBTS code to compile? -- View this message in context: http://www.nabble.com/Does-OpenBTS-compile-tp19614533p19614533.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-

Re: [Discuss-gnuradio] basic usrp cygwin install questions

When you get everything worked out, can you please post your procedure so that others can use it. Thanks in advance, Isaac -- View this message in context: http://www.nabble.com/basic-usrp-cygwin-install-questions-tp19399754p19401189.html Sent from the GnuRadio mailing list archive at Nabble.co

RE: [Discuss-gnuradio] USRP2 Price

I dont see any daugterboards that work for the USRP2. isaac -- View this message in context: http://www.nabble.com/USRP2-Price-tp19399125p19400649.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Dis

Re: [Discuss-gnuradio] USRP2 Price

What about the daughter boards? Any rough ideas? -- View this message in context: http://www.nabble.com/USRP2-Price-tp19399125p19399213.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradi

[Discuss-gnuradio] USRP2 Price

Any ideas in US dollars? Isaac -- View this message in context: http://www.nabble.com/USRP2-Price-tp19399125p19399125.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://

[Discuss-gnuradio] USRP2

Where can I find information on what capabilities of the USRP2? Any ppt slides available for this? Thanks in advance, Isaac -- View this message in context: http://www.nabble.com/USRP2-tp19371391p19371391.html Sent from the GnuRadio mailing list archive at Nabble.com. __

Re: [Discuss-gnuradio] The OpenBTS project - an open-source GSM basestation using the USRP and VoIP

How do you implement your energy detector to detect the bursts? Also, on your website, you say you can process 7 calls simultaneously on the MacBook.Are all these calls on 1 ARFCN? (ie you have 7 of the time slots simultaneously filled). What code/algorithm are you using for the GSM demodulat

Re: [Discuss-gnuradio] VSat

Test isaacgerg wrote: > > Has anyone done anything with GNU Radio / USRP and VSats? > -- View this message in context: http://www.nabble.com/VSat-tp19160592p19169107.html Sent from the GnuRadio mailing list archive at Nabble.com. __

[Discuss-gnuradio] VSat

Has anyone done anything with GNU Radio / USRP and VSats? -- View this message in context: http://www.nabble.com/VSat-tp19160592p19160592.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnura

[Discuss-gnuradio] GNU Radio Software Performance

Does anyone have any performance metrics of the GNU Radio software for a given platform? Also, has anyone been able to demodulate GMSK in real time? Any feedback would be appreciated. Thanks in advance, Isaac -- View this message in context: http://www.nabble.com/GNU-Radio-Software-Performa

[Discuss-gnuradio] Time tagging

Is there any plans to have the data time tagged as it comes out of the USRP? Isaac -- View this message in context: http://www.nabble.com/Time-tagging-tp18895912p18895912.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-g

[Discuss-gnuradio] Best GNU Radio'ing in real time (or near real time)

Hi everyone, I was wondering what are the largest bandwidths/signals people here have processed in real time on their PC's using the GNU Radio. For example maybe, HDTV, GSM, etc. What were you computers specs? Thanks in advance, Isaac -- View this message in context: http://www.nabble.com/

[Discuss-gnuradio] Data distribution rates with USRP

Hi everyone, Suppose I wanted to just read in data from the USRP and broadcast it out over gigabit ethernet to a bunch of machines what is the largest bandwidth I could do this with and not drop data from the USB link. Isaac -- View this message in context: http://www.nabble.com/Data-distr

Re: [Discuss-gnuradio] Flipping problem

If this is true, why is it that the residual carrier is reported as zero? Are you suggesting that this value is not correct? Isaac Matt Ettus wrote: > > isaacgerg wrote: >> I am sending a known sequence of samples from one USRP to another using >> the >> Basix RX

Re: [Discuss-gnuradio] Possible residual carrier not reported correctly

Eric, When you talk about the FPGA, do you mean that I can repull and reinstall the FPGA code for the USRP? This I have never done since the radio has been purchased 2 years ago. Isaac Eric Blossom wrote: > > On Mon, Jul 28, 2008 at 12:27:22PM -0700, isaacgerg wrote: >> >

Re: [Discuss-gnuradio] Possible residual carrier not reported correctly

: > > On Mon, Jul 28, 2008 at 12:27:22PM -0700, isaacgerg wrote: >> >> Eric, >> I pulled GNU Radio from the SVN repository no more than 3 months ago. >> What do you mean the FPGA had a flipping problem? Wouldnt this affect my >> USRP hardware or does the GNU Rad

Re: [Discuss-gnuradio] Possible residual carrier not reported correctly

Eric, I pulled GNU Radio from the SVN repository no more than 3 months ago. What do you mean the FPGA had a flipping problem? Wouldnt this affect my USRP hardware or does the GNU Radio code correct for it? Isaac Eric Blossom wrote: > > On Mon, Jul 28, 2008 at 11:34:01AM -0700, isa

Re: [Discuss-gnuradio] Possible residual carrier not reported correctly

Eric, I have answered you questions inline: >>Are you seeing any over or underruns ("uOuO" or "uUuU") on the console? Occasionally, I see "u0" on the rx. But, even if i post process data offline, i still get the "flip" >> How wide is the signal you're trying to send? The rx interp is 256 a

[Discuss-gnuradio] Possible residual carrier not reported correctly

Hi, I am using the Basic RX/TX at 24Mhz. Both the tx and rx tell me that there is no residual carrier. yet, the waveform I send seems to keep flipping from positive to negative polarity. Is it possible that there is residual carrier that is not being reported correctly? Thanks in advance. Is

[Discuss-gnuradio] Possible residual carrier not reported correctly

Hi, I am using the Basic RX/TX at 24Mhz. Both the tx and rx tell me that there is no residual carrier. yet, the waveform I send seems to keep flipping from positive to negative polarity. Is it possible that there is residual carrier that is not being reported correctly? Thanks in advance. Is

[Discuss-gnuradio] Flipping problem

I am sending a known sequence of samples from one USRP to another using the Basix RX/TX d'boards setting the frequency to 24e6. When I rx the sequence, the correlation of it keeps flipping, but not in a way that suggests residual carrier. It seems as if I am experiencing an instantaneous flip.

[Discuss-gnuradio] USRP Gain

Is there any documentation on what the gain does for the USRP receive and transmit functions. Sometimes it seems like these values are meaningless. Also, I am noticing that when I begin to Rx data, there is often a huge amplitude spike within the first 2k samples I Rx. Is this normal? -- Vie

[Discuss-gnuradio] GNU Radio Companion Simplex Tx/Rx not working

I have the basic TX and basic RX boards for my USRP. I am using GRC 0.7 and I cant get the simplex tone test to work. What setting should I tweak or do you know why it wouldnt work? Is it possible that I have the wrong antenna? Thanks in advance -- View this message in context: http://www.na

Re: [Discuss-gnuradio] GNU Radio Companion USRP Transmitter Example

No luck. Can you send me an example xml schema for a transmitter that you know works? Thanks in advanced, Isaac Josh Blum wrote: > > > isaacgerg wrote: > >> Does anyone have an .xml file that shows an example of doing this? >> Currently, I have a USRP sink with the

[Discuss-gnuradio] GNU Radio Companion USRP Transmitter Example

Does anyone have an .xml file that shows an example of doing this? Currently, I have a USRP sink with the following parameters and I cant get any signals on my Rx USRP. I know my Rx USRP is working as I can run the gnuradio ptt example and I can see energy appearing on the PSD. Here are my USRP

[Discuss-gnuradio] GMSK Viterbi Equalization

Is this scheme as simple as doing an LMS decision-directed equalization scheme where the Viterbi algorithm used to make the symbol decision? -- View this message in context: http://www.nabble.com/GMSK-Viterbi-Equalization-tp17786331p17786331.html Sent from the GnuRadio mailing list archive at

Re: [Discuss-gnuradio] gsm gmsk demodulation

My question to all of you responding on this question then is: How do I convert the amplitudes of my GMSK signal to probabilities for viterbi based demodulation? Isaac Steven Clark-2 wrote: > > On Thu, Jun 5, 2008 at 7:45 AM, isaacgerg <[EMAIL PROTECTED]> wrote: >> >>

Re: [Discuss-gnuradio] Posted: Enhanced GMSK demodulator

Ive noticed that the papers you cited only take in "real" data and not "complex." Is this true? Is this true for your implementation? Isaac Steven Clark-2 wrote: > > I've added a link to > http://gnuradio.org/trac/wiki/Enhanced_GMSK_Demodulator from > http://gnuradio.org/trac/wiki/OurUsers

Re: [Discuss-gnuradio] gsm gmsk demodulation

Steven, That is totally rockin'; thanks! Isaac Steven Clark-2 wrote: > > On Thu, Jun 5, 2008 at 7:45 AM, isaacgerg <[EMAIL PROTECTED]> wrote: >> >> Hi, >> Concerning GSM GMSK demodulation, due to the ISI, I initially thought >> many >> folks w

[Discuss-gnuradio] gsm gmsk demodulation

Hi, Concerning GSM GMSK demodulation, due to the ISI, I initially thought many folks were using the Viterbi algorithm on the waveform to demodulate it properly. After doing some lit review, I am finding that this is not the case and that when most folks talk about Viterbi concerning GSM GMSK de

Re: [Discuss-gnuradio] gnuradio compile problems for i686

I am using whatever version is on fedora core 9 (im not at the machine), what does "use the trunk" mean? Eric Blossom wrote: > > On Mon, Jun 02, 2008 at 11:14:57AM -0700, isaacgerg wrote: >> >> I get the same errors with gnuradio 3.1.2 and 3.1.1 >> >

[Discuss-gnuradio] gnuradio compile problems for i686

I get the same errors with gnuradio 3.1.2 and 3.1.1 gr_dispatcher.cc In member function 'void gr_dispatcher::loop(double)': gr_dispatcher.cc:177: error 'perror' was not declared in this scope. Thanks in advanced, Isaac -- View this message in context: http://www.nabble.com/gnuradio-compile-pro

Re: [Discuss-gnuradio] GNURadio Companion File Sink

I dont understand, in your previous post you said the following: "Unless the data stream is an array of complex, float, int, short, or byte, the vector length should be 1. " Yet, you are telling me it should be one. Is this correct? Josh Blum wrote: > > isaacgerg wrote: &

Re: [Discuss-gnuradio] GNURadio Companion File Sink

Im not down in the code, Im just trying to use the application. What does that number translate to? Also, once I get the data, how is it formated? as 2 float32 values, one for the real arm and one for the imaginary part? -- View this message in context: http://www.nabble.com/GNURadio-Companio

Re: [Discuss-gnuradio] GNURadio Companion File Sink

data type > (complex, float, int...) and the vector length. The size of the data > stream = number of bytes in the data type times the vector length. > > Unless the data stream is an array of complex, float, int, short, or > byte, the vector length should be 1. > > -Josh >

[Discuss-gnuradio] GNURadio Companion File Sink

What does the vector length option mean? It is set to 1 by default. -- View this message in context: http://www.nabble.com/GNURadio-Companion-File-Sink-tp17541624p17541624.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss

Re: [Discuss-gnuradio] GMSK midamble template matching

I am also finding that I need to match against not only the template, but the complex conjugate of the template too! -- View this message in context: http://www.nabble.com/GMSK-midamble-template-matching-tp17512969p17541609.html Sent from the GnuRadio mailing list archive at Nabble.com.

[Discuss-gnuradio] GMSK midamble template matching

I would like to identify the 26 midamble bits in each burst of GSM (GMSK) data. I hear that a lot of ppl use correlation to do this. However, I am struggling to understand how this technique could work due to the ISI from the Gaussian pulse shaping. It seems that the wavefrom of the 26 midambl

Re: [Discuss-gnuradio] BasicRx Daugterboard Frequency Wrapping

It looks like i need to get an RF front end to pre-filter all that stuff out of there. -- View this message in context: http://www.nabble.com/BasicRx-Daugterboard-Frequency-Wrapping-tp17375343p17408282.html Sent from the GnuRadio mailing list archive at Nabble.com. ___

Re: [Discuss-gnuradio] BasicRx Daugterboard Frequency Wrapping

The mapping you ask describing isnt what I am getting. According to your scheme, with the Basic RX board, I shouldnt be able to get any FM radio stations, but I am able to get them. Why is this? Isaac -- View this message in context: http://www.nabble.com/BasicRx-Daugterboard-Frequency-Wra

Re: [Discuss-gnuradio] BasicRx Daugterboard Frequency Wrapping

In the short term, how do i fix this problem? Do I just low pass filter my incoming signal? Isaac Ed Criscuolo-2 wrote: > > isaacgerg wrote: >> Hi, >> I am hooked up to the BasicRx Daughterboard and wrote a simple >> applicate >> using the GRC to survey th

[Discuss-gnuradio] BasicRx Daugterboard Frequency Wrapping

Hi, I am hooked up to the BasicRx Daughterboard and wrote a simple applicate using the GRC to survey the spectrum from 1MHz to 250MHz and run the user tunable output through the WFM Demodulator. I can get FM radio stations in the 88-108MHz region just find. However, I am also getting copies of