Re: [Discuss-gnuradio] How do YOU packet detect?

2015-03-05 Thread Richard Bell
Oh, what branch might that be? It's not obvious to me. Thanks, Rich On Thu, Mar 5, 2015 at 7:27 AM, Martin Braun martin.br...@ettus.com wrote: On 04.03.2015 14:04, Richard Bell wrote: Ah, after re-reading the Header/Payload Demux docs, I noticed the trigger port is optional. The block will

Re: [Discuss-gnuradio] Issues Installing From Source

2015-03-05 Thread Johnathan Corgan
This might be related to an issue I ran into with 14.04.2 when making the Live SDR images based on that. If you install 14.04.2 from CD, then do: $ apt-get install libgl1-mesa-dev-lts-utopic mesa-common-dev-lts-utopic ...then try build-gnuradio, does it work? On Thu, Mar 5, 2015 at 2:01 PM,

Re: [Discuss-gnuradio] Issues Installing From Source

2015-03-05 Thread Johnathan Corgan
On Thu, Mar 5, 2015 at 2:41 PM, Johnathan Corgan johnat...@corganlabs.com wrote: $ apt-get install libgl1-mesa-dev-lts-utopic mesa-common-dev-lts-utopic That would be 'sudo apt-get install ...' -- Johnathan Corgan Corgan Labs - SDR Training and Development Services http://corganlabs.com

Re: [Discuss-gnuradio] Issues Installing From Source

2015-03-05 Thread Peter Witkowski
All, My hesitation to use PyBOMBS was only a function of the fact that I've have had really good success using the build-gnuradio script in the past. I've deployed GNU Radio and UHD using Marcus's awesome script several times and never had an issue. Also, I can confirm that the problem (at

Re: [Discuss-gnuradio] Issues Installing From Source

2015-03-05 Thread Richard Bell
Are you guys avoiding pybombs for a reason, or do you just not feel comfortable with it? If you're aware of pybombs and have a reason for avoiding it, then stop reading here. Pybombs works really well on Ubuntu 14.04. I've installed UHD + GnuRadio on multiple machines without a problem. Using it

[Discuss-gnuradio] Build error /usr/local/lib/libpython2.7.a: error adding symbols: Bad value

2015-03-05 Thread Tom Cipollone
I have been attempting to build gnuradio from the source and have encountered this error which is obviously related to my Python installation. I have built Python2.7.8 from source with the confguration: ./configure --enable-shared --prefix=/usr/local I have read that without the --enable-shared

Re: [Discuss-gnuradio] Issues Installing From Source

2015-03-05 Thread krishnachand leela
Hello Peter I had installed yesterday on my laptop with Ubuntu 14.04 I tried using WGET. but I got the similar problems like you regarding the git.. So, I have installed it from source and haven't got any problem. You can follow these steps for installing it from source Thee are two

Re: [Discuss-gnuradio] PSD in dBm/Hz

2015-03-05 Thread Martin Braun
Activecat, this is actually on our FAQ: http://gnuradio.org/redmine/projects/gnuradio/wiki/FAQ#How-do-I-know-the-exact-voltagepower-of-my-received-input-signal This is a very difficult problem to solve and it requires expensive lab equipment. Regards, Martin On 04.03.2015 23:43, Activecat

Re: [Discuss-gnuradio] regarding demodulation in ofdm

2015-03-05 Thread Martin Braun
Also, you're using the old-style OFDM blocks. I suggest looking at ofdm_loopback.grc for an example on how to use the new ones. M On 05.03.2015 02:45, Marcus Müller wrote: Hi Roja, you forgot to actually explain what does not work. I'll refer you to [1] there's a few things odd with your

Re: [Discuss-gnuradio] Issues Installing From Source

2015-03-05 Thread mleech
So, if I could get an actual, detailed, error-report when build-gnuradio fails, I can look into fixing it. It has worked well on Ubuntu 14.04 since 14.04 was released, but it may be the case that some system update changed something that buggered up an assumption that build-gnuradio is

Re: [Discuss-gnuradio] gnuradio importerror undefined symbol

2015-03-05 Thread Marcus Müller
Hello Mohammad, interesting! Now, in most cases something like that happens when you accidentially link (during build) against one version of GNU Radio, but at run time (when executing ctest), another version is found and used. Is it possible that's the case here (i.e. how did you install GNU

Re: [Discuss-gnuradio] How do YOU packet detect?

2015-03-05 Thread Martin Braun
On 04.03.2015 14:04, Richard Bell wrote: Ah, after re-reading the Header/Payload Demux docs, I noticed the trigger port is optional. The block will trigger on tags connected to the input stream. What seems like the best strategy to me now is this: 1) Detect the header with a correlator and add

Re: [Discuss-gnuradio] [USRP-users] issue with Rx/Tx loopback in FPGA of E310

2015-03-05 Thread Martin Braun
Ben, there's only limited buffering in the E310, so I'm not entirely surprised. There's quite some effort involved in getting the data from the FPGA to userland and back (this is what you're doing, right? Connecting the USRP Source straight to the USRP sink?). In a sense, you're not cutting

Re: [Discuss-gnuradio] PSD in dBm/Hz

2015-03-05 Thread madengr
Do you mean adding a text label on the vertical axis, or scaling the spectrum? For the latter, you would have to feed the USRP a known (calibrated) noise source that is well above the USRP noise floor such as an HP 346 noise source. Then read the value from the spectrum and just re-scale the

Re: [Discuss-gnuradio] How to show the internal clock on the flowgraph

2015-03-05 Thread Marcus Müller
Hi Manuel, On 03/05/2015 01:40 PM, Manuel David Lozano Amezquita wrote: Hi Marcus, Now I have another question, How can I estimate the time shift in fractional samples?, for example, I have a Cosine signal with amplitude of 1 v, and 1 kHz, and I configure my sample rate in 1 MHz. Then I

[Discuss-gnuradio] Final Deadline 07 March, CROWMCOM Workshop on Cognitive Radio for 5G

2015-03-05 Thread Bogale, Tadilo Endeshaw
Apologies if you receive multiple copies of this call. CALL FOR PAPERS ===

Re: [Discuss-gnuradio] regarding demodulation in ofdm

2015-03-05 Thread Marcus Müller
Hi Roja, you forgot to actually explain what does not work. I'll refer you to [1] there's a few things odd with your flow graph, nevertheless: 1. Double throttle: you'll only ever need one throttle block. I'd explain, but I think it's easy enough to understand once one realizes what throttle

[Discuss-gnuradio] DySPAN 5G spectrum challenge

2015-03-05 Thread sreeraj r
Hi all, This is a gentle reminder for the DySPAN 5G spectrum challenge [1] which is organized by IEEE. The primary user and database code is already available on the webpage [2]. For more details and queries please subscribe to the Spectrum Challenge mailing list [1]. It will be fun to work on