Re: [Discuss-gnuradio] Make fails in gr-how-to-write-a-block

2009/2/11 Eric Blossom > On Wed, Feb 11, 2009 at 03:45:54PM +0100, Emil Molin wrote: > > So i want to learn how to write a block but it fails to install > apparently. > > > > after doing ./bootstrap and then ./configure > > > > make gives the following message: > > > > libtool: Version mismatch e

Re: [Discuss-gnuradio] usrp_siggen.py underruns

Hi! Thanks for your answer. And thanks Frank Brickle, too! Uhh, 12.5 MS/s is 50MB/s (16-bit I&Q across the wire). Sorry, my fault. Yes, there are lots of ways to do this. In this particular case, you're going to want to keep track of the worst case and average run times. Hm run times may n

[Discuss-gnuradio] Re: some usrp modules are missing

Markus Feldmann gmx.de> writes: > > the is missing. As i read, the Tool is now called . Regards Markus ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] Re: Usrp2 and Agere ET131x compatibility

Tha's weired. Apparently Ubuntu 8.10 kernel includes Agere driver since my laptop perfectly works ever since I installed Ubuntu 8.10. But when I try the "fund_usrps" while monitoring the network packet, nothing goes out though eth0 (Agere ET131). Unfortunately, my laptop does only has a PCMCIA s

[Discuss-gnuradio] Frequency dependent problem after syncronizing , Please help!

Hey all, I syncronized my USRPs(one is v4.3 and the other v4.5) by using the USRP clocking notes on http://www.gnuradio.org/trac/wiki/USRPClockingNotes, to make them frequency and phase syncronized. I want to use one as TX and other as RX, with XCVR daugherboards on them. But, what I got afre sy

[Discuss-gnuradio] Measuring SNR

Hi, I am trying to implement a particular channel coding technique as part of my work(Master's Thesis). I need to test this technique in a fading channel. But since I have no control over the channel I cannot quantify channel condition.I need SNR to analyze the performance of the coding technique.

Re: [Discuss-gnuradio] usrp_siggen.py underruns

On Thu, Feb 12, 2009 at 11:07:43AM +0100, Dominik Auras wrote: > Hi! > >> Yes, there are lots of ways to do this. In this particular case, >> you're going to want to keep track of the worst case and average run >> times. > > Hm run times may not be the appropriate performance measure in my case.

Re: [Discuss-gnuradio] Re: some usrp modules are missing

On Thu, Feb 12, 2009 at 10:18:55AM +, feldmaus wrote: > Markus Feldmann gmx.de> writes: > > > > the is missing. > > As i read, the Tool is now called > . > > Regards Markus I have no idea what you're talking about :-) Have you tried ./configure --help It lists all the modules that ex

Re: [Discuss-gnuradio] Re: some usrp modules are missing

On Thu, 2009-02-12 at 08:34 -0800, Eric Blossom wrote: > On Thu, Feb 12, 2009 at 10:18:55AM +, feldmaus wrote: > > As i read, the Tool is now called > > . > > I have no idea what you're talking about :-) usrp_diagnostics was an installed script by the grc module, which I felt was poorly name

Re: [Discuss-gnuradio] Measuring SNR

On Thu, Feb 12, 2009 at 08:57:11AM -0600, Swapna Raj wrote: > Hi, > > My second question is more related to Python programming. I need to run a > series of scripts one after the other in my work.Though these scripts work > fine independently. I get an error when I use os.popen(). In most cases I d

Re: [Discuss-gnuradio] USRP2 PPS and REF

Johnathan Corgan wrote: > On Tue, Feb 10, 2009 at 1:26 PM, Douglas Geiger > wrote: > >> Ok, looking at the frames in wireshark, looking for the timestamps that >> were sent to the copy handler, it looks like only the frames from 30:80 >> are being used, and they're being used twice (i.e. u2b->rx_

Re: [Discuss-gnuradio] Frequency dependent problem after syncronizing , Please help!

On Thu, Feb 12, 2009 at 5:43 AM, Bruhtesfa Ebrahim wrote: > I syncronized my USRPs(one is v4.3 and the other v4.5) by using the USRP > clocking notes on http://www.gnuradio.org/trac/wiki/USRPClockingNotes, > to make them frequency and phase syncronized. Ok. > ...Then,I run usrp_fft.py on the ma

Re: [Discuss-gnuradio] how to generate a periodic pulse

Hey, Bruhtesfa, This is Yufeng. I have a more simpler question on Python, do you know which codes can I use to generate a fixed length of random 0 and 1s, and how to modulate them in PSK, do you have any idea about this? Thanks! On Mon, Feb 9, 2009 at 5:11 AM, Bruhtesfa Ebrahim wrote: > Hey a

Re: [Discuss-gnuradio] how to generate a periodic pulse

On Mon, Feb 9, 2009 at 2:11 AM, Bruhtesfa Ebrahim wrote: > Hey all, > > I want to generate a periodic rectangular pulse(of low duty cycle) from > one USRP and receive it using another USRP operating simultaneously. > > So, is there some built in function to generate such a pulse? > Also,what filte

Re: [Discuss-gnuradio] CGRAN downtime

Frank Brickle wrote: Definitely. Done. PS. the trac wiki is having some issues using mod_python, it's segfaulting on me and I'm trying to fix this now. So, to all using the trac wiki on CGRAN, hang in there. - George ___ Discuss-gnuradio

[Discuss-gnuradio] CCSDS 27 Encode/Decode

I'm looking at building a quick prototype narrowband QAM16 transceiver with error-correction. I'm looking at the CCSDS 27 blocks, and the encode *looks* to me like it takes bytes in, and bytes out. But the decoder is different. Can somebody "clue me up" about how to use them? -- Marcus Leech

Re: [Discuss-gnuradio] CCSDS 27 Encode/Decode

On Thu, 2009-02-12 at 14:29 -0500, Marcus D. Leech wrote: > I'm looking at building a quick prototype narrowband QAM16 transceiver > with error-correction. I'm looking at the CCSDS 27 > blocks, and the encode *looks* to me like it takes bytes in, and bytes > out. > > But the decoder is differe

Re: [Discuss-gnuradio] Make fails in gr-how-to-write-a-block

On Thu, Feb 12, 2009 at 2:03 AM, Emil Molin wrote: >> > after doing ./bootstrap and then ./configure >> > >> > make gives the following message: >> > >> > libtool: Version mismatch error. This is libtool 2.2.6, but the >> > libtool: definition of this LT_INIT comes from an older release. >> > li

[Discuss-gnuradio] Re: Frequency dependent problem after syncronizing , Please help!

Johnathan Corgan wrote: > On Thu, Feb 12, 2009 at 5:43 AM, Bruhtesfa Ebrahim > wrote: > It sounds like, since you have perfect synchronization between > transmitter and receiver, that what you have after downconversion in > the daughterboard is DC + noise. That is, the transmitted carrier > (pl

Re: [Discuss-gnuradio] Re: some usrp modules are missing

The usrp_diagnostics script was renamed usrp_probe. Part of this confusion may have come from the freedesktop menu item: If you have installed the menu items for grc, run the following to remove the old "usrp diagnostics" menu item: sudo xdg-desktop-menu uninstall gnuradio-usrp_diagnostics.des

Re: [Discuss-gnuradio] Re: Frequency dependent problem after syncronizing , Please help!

On Thu, Feb 12, 2009 at 1:20 PM, Bruhtesfa Ebrahim wrote: > What makes it strange is the dependence on gain.when the linear gain in > the spectrum panel(usrp_fft.py)is set to 0,the signal at the center(the > DC)is 5dB higher than the noise level.When I increase the gain, the > difference between

[Discuss-gnuradio] gnuradio mentioned in cnet article on phone snooping

Gnuradio was recently mentioned in this article on the technology of phone snooping: http://news.cnet.com/8301-13739_3-10159055-46.html ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradi

[Discuss-gnuradio] Connecting and disconnecting a usrp

Hey all, I have a quick question about connecting and disconnecting a usrp within the same python run. My test program creates a top block, within the top block it attempts to create a usrp.source_c(0), it then deletes the source goes to sleep and waits for a KeyboardInterrupt, when this is de

[Discuss-gnuradio] Filterbank stuff

I'm toying with some insane ideas for EME (Moonbounce) for a friend of mine. I'm toying with taking a modulated baseband from a QAM16 modulator, and replicating it across several spectral pickets over a wide band, then on reception doing "something" with these redundant copies to improve SNR/BER

Re: [Discuss-gnuradio] Filterbank stuff

Marcus D. Leech wrote: I'm toying with some insane ideas for EME (Moonbounce) for a friend of mine. I'm toying with taking a modulated baseband from a QAM16 modulator, and replicating it across several spectral pickets over a wide band, then on reception doing "something" with these redundant

Re: [Discuss-gnuradio] Filterbank stuff

On Thu, Feb 12, 2009 at 3:31 PM, Marcus D. Leech wrote: > I'm currently thinking Analysis Filterbank/Synthesis Filterbank to take > the baseband signals, and spread them across > a wider spectrum, with replication. Aside from what Matt says regarding QAM and OFDM, if you truly want to exactly r

Re: [Discuss-gnuradio] Filterbank stuff

Marcus D. Leech wrote: I'm toying with some insane ideas for EME (Moonbounce) for a friend of mine. I'm toying with taking a modulated baseband from a QAM16 modulator, and replicating it across several spectral pickets over a wide band, then on reception doing "something" with these redundant

Re: [Discuss-gnuradio] Filterbank stuff

Bob McGwier wrote: > PLEASE do yourself a favor and look at WSJT by Joe Taylor. This guy > has years and years and years of experience doing this. He has > studied the problem absolutely to the n-th degree. His system is > really beautifully done. And, you know he isn't a nut case because > he

Re: [Discuss-gnuradio] Filterbank stuff

On Thu, Feb 12, 2009 at 7:59 PM, Marcus D. Leech wrote: > I'm looking into this for a friend who wants to use his USRP2 for EME. > I'll see if I can do something JT65-like (or exactly that!) > in Gnu Radio. You should be able to just use it via portaudio on top of JACK, talking to the USRP th

Re: [Discuss-gnuradio] Measuring SNR

Eric, Thank You. os.system() worked. I can now switch between different scripts while in transmitting mode. To all, While receiving data (using a modification of benchmark_rx.py) I need to receive at a different frequency depending on some control information . I get an error message while attem

Re: [Discuss-gnuradio] Filterbank stuff

WSJT uses portaudio directly and that can talk to jack through its portaudio host if jack has been compiled with that support in it. Bob Frank Brickle wrote: On Thu, Feb 12, 2009 at 7:59 PM, Marcus D. Leech > wrote: I'm looking into this for a friend who wants

Re: [Discuss-gnuradio] Measuring SNR

I am sorry if my previous mail was confusing. I am trying to switch toa different Rx freq depending on a control information. Even though I exit from rx_callback and try to call a new script for Rx using os.system I get an error message saying USB _claim_interface :failed interface 2 Device or res

Re: [Discuss-gnuradio] Filterbank stuff

On Thu, Feb 12, 2009 at 11:15 PM, Bob McGwier wrote: > WSJT uses portaudio directly and that can talk to jack through its > portaudio host if jack has been compiled with that support in it. Ideally, yes. However, unless some of the WSJT code has been rewritten, despite appearances, you're limi