Re: [Discuss-gnuradio] SDR Design Competition (take 2)

2006-05-28 Thread al davis
> "The SDR Forum intends to seek permission to publish > proposals, design documents, engineering drawings, source > code, analyses, and supporting material developed under the > challenge entires. No materials shall be marked > `proprietary'." > > IMHO tt would be even better if the implied "owne

Re: [Discuss-gnuradio] Suggestions for newbies?

2006-05-28 Thread al davis
On Sunday 28 May 2006 21:15, Robert Roberts wrote: > I'm currently writing a set of laboratory exercises utilizing > MATLAB/Simulink and GNURadio/USRP that will introduce various > communications and digital signal processing concepts. I hope > to release them once I am finished so they should prov

Re: [Discuss-gnuradio] SDR Design Competition

2006-05-18 Thread al davis
On Thursday 18 May 2006 16:52, John Gilmore wrote: > (They won't accept work that has been released under a public > license, such as the GPL or even the BSD license.  If you > spend two years writing this stuff, they will *own* it at the > end, and you won't even be able to keep working with or >

Re: [Discuss-gnuradio] ANCI-C vs Gnuradio/C++ speeeed

2006-05-12 Thread al davis
Responding to my own post ... Here's why the difference is so important: On Friday 12 May 2006 18:34, al davis wrote: > You are returning a vector by value: > from fsm.h: > // >   std::vector NS () const { return d_NS; } >   std::vector OS () const { return d_OS;

Re: [Discuss-gnuradio] ANCI-C vs Gnuradio/C++ speeeed

2006-05-12 Thread al davis
On Friday 12 May 2006 18:24, Ilia Mirkin wrote: > Also, when you do > > vector x; > x[0] = 5; > > keep in mind that internally it instantiates a new int > object, and then calls operator= on it. The compiler might > optimize this to a certain extent, but certainly not to the > level of simplicity o

Re: [Discuss-gnuradio] ANCI-C vs Gnuradio/C++ speeeed

2006-05-12 Thread al davis
On Friday 12 May 2006 17:56, Achilleas Anastasopoulos wrote: > you can find the relevant code here: > > http://www.eecs.umich.edu/~anastas/gnuradio/ > > looking forward to your comments. You are returning a vector by value: from fsm.h: // std::vector NS () const { return d_NS; } std::v

Re: [Discuss-gnuradio] Stereo gain "hacked"

2006-02-13 Thread al davis
On Tuesday 14 February 2006 00:13, Robert McGwier wrote: > But the COMPOSITE signal is what is > FM modulated but I bet they do not preemphasize the composite > signal. They might do preemphasis on the L+R baseband signal > as Matt suggests but I just don't know about the others.  I > am trying to

Re: [Discuss-gnuradio] Stereo gain "hacked"

2006-02-13 Thread al davis
On Monday 13 February 2006 20:06, Matt Ettus wrote: > I seem to remember that the preemphasis on stereo signals is > not performed on the multiplexed signal.  It is actually > performed on the audio components separately, before mixing > with the stereo subcarrier. Therefore deemphasis needs to be

Re: [Discuss-gnuradio] NBFM

2005-02-17 Thread Al Davis
On Thursday 17 February 2005 07:32 pm, Marcus D. Leech wrote: > In the analog world, do they implement squelch using >   detected RF power levels (i.e. prior to FM demod), or >   something else? It is usually done by measuring detected noise. Recall, in FM, audio output level is independent of t