Re: [Discuss-gnuradio] Questions on DDC output

2008-01-18 Thread Firas A.
Hi, Checkout the USRP measurement pointed by : http://www.nabble.com/USRP-Dynamic-Range-and-8-Bit-Problem-to14471573.html#a14484747 May be it will answer some of your questions. Keep in your mind that USRP is not a measurement device. It is an SDR peripheral device. If you want to use it as a

Re: [Discuss-gnuradio] Need info for paper.

2008-01-18 Thread Tom Rondeau
John Clark wrote: George Nychis schrieb: Hi John, There are a couple other SDR-type platforms in the academic world... but none really come close to the code base of GR IMO. Some of these seemed pretty 'expensive' to get into... the use of ASICs, and the like, also, they seem to be

[Discuss-gnuradio] Measure BER

2008-01-18 Thread irene159
Hi all, I'm currently working on a GSMK modem, and I would like to calculate the BER of the link. I send data using gr.vector_source_b( ) connected to a GMSK modulator/demodulator and receive the signal in gr.vector_sink_b( ). 1) How can I measure BER from the vector_source and vector_sink ? 2)

Re: [Discuss-gnuradio] Need info for paper.

2008-01-18 Thread Michael Dickens
On Jan 17, 2008, at 8:57 PM, Martin Dvh wrote: If you need any other kind of info, please let me know. I have done some presentations on GnuRadio and Software Defined Radio and I am preparing for some GnuRadio courses that I will be giving. It would be appreciated if you made the paper

Re: [Discuss-gnuradio] Gnu Radio Companion (GRC) 0.69 experience

2008-01-18 Thread Ed Criscuolo
I've seen this exact same behavior for some time. I'm currently running the latest GnuRadio release and GRC 0.69 on Mac OSX 10.4.11 @(^.^)@ Ed Achilleas Anastasopoulos wrote: I would like to thank again Josh for the wonderfull job on GRC: I am now using it regularly for my classroom

Re: [Discuss-gnuradio] Measure BER

2008-01-18 Thread George Nychis
Hi, BER is defined as the % of bits that have errors to the total number of bits. Therefore, you need to calculate the number of incorrect bits. To do this you would need to know the correct bits to compare your received bits to. You can then easily compute the number of incorrect bits.

Re: [Discuss-gnuradio] blks2.synthesis_filterbank

2008-01-18 Thread Johnathan Corgan
On 1/18/08, beezle bub [EMAIL PROTECTED] wrote: It might be the case that if I fix my own code, I can also fix the blks2.synthesis_filterbank. Let me know what you find. I haven't looked at your bug report yet. -- Johnathan Corgan Corgan Enterprises LLC http://corganenterprises.com/

Re: [Discuss-gnuradio] Gnu Radio Companion (GRC) 0.69 experience

2008-01-18 Thread Josh Blum
The error seems to come from gtk.main and not from the GRC source itself. Perhaps this is the result of a race condition (in grc) between the the main thread and the thread waiting on the flow graph to finish. -By clicking the kill button, the waiting thread finishes by calling the very same

Re: [Discuss-gnuradio] Information on ticket:181 and invitation to help (long)

2008-01-18 Thread Ed Criscuolo
Here's a sample with: Gnu Radio 3.1.1 g++ 4.0.1 Python 2.4.4 Swig 1.3.33 OSX 10.4.11 [eds-mac:~] edwardc% python Python 2.4.4 (#1, Dec 19 2007, 10:55:40) [GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin Type help, copyright, credits or license for more information. from

Re: [Discuss-gnuradio] Measure BER

2008-01-18 Thread Tom Rondeau
George Nychis wrote: Hi, BER is defined as the % of bits that have errors to the total number of bits. Therefore, you need to calculate the number of incorrect bits. To do this you would need to know the correct bits to compare your received bits to. You can then easily compute the number

RE: [Discuss-gnuradio] blks2.synthesis_filterbank

2008-01-18 Thread beezle bub
So, interesting things. Incidentally, I was the guy who posted about the segfault in top_block. 1) On my laptop runing ubuntu 7.10 natively with latest stuff installed, I got the segfault. On my virtualized ubuntu on my macbook, I got a real error message (btw fyi, ubuntu + parallels does

Re: [Discuss-gnuradio] Gnu Radio Companion (GRC) 0.69 experience

2008-01-18 Thread Berndt Josef Wulf
G'day, Still crashes here with the following error messages: No module named serial in RS232 Source! - continuing... No module named serial in RS232 Sink! - continuing... Removing empty category Custom... Verbose: Traceback (most recent call last): File

Re: [Discuss-gnuradio] Need info for paper.

2008-01-18 Thread Bob McGwier
I have two of the Lyrtech boards and with the develpment tools for DSP chip and FPGA. Using Matlab simulink, and code generation, etc. for rapid prototyping this is just about ohh, one hundred grand.. The Matlab is shared license at work as is the DSP and FPGA development tools but this