On Mon, Aug 21, 2006 at 11:50:50PM -0700, Swapneel S. Ukhalkar wrote: > I posted on a similar topic about two weeks ago but it really didn't > help me. I am new to the world of GNU radio and have been fiddling with > my USRP and RFX2400 daughterboard to acquire 802.11b signals. At this > point, I just would like to take the fft of a chunk of spectrum so that > I may see all of the wireless signals in the vicinity and their > strengths (much like Eric Blossom did for the FM stations in Figure 3 of > his "Listening to FM Radio in Software" article at > http://www.linuxjournal.com/article/7505). I have been going over the > basic FM receiver code in the GNU radio tutorials. I can see how easy it > is to see different FM signals in a spectrum chunk. However, one of the > things that I'm having trouble understanding is how each 802.11 signal > is differentiated from one another (apart from the spectral mask). Could > you give me some insight into what I have to do to acquire and display > the appropriate signals. Maybe if I looked at the code which was used to > generate Figure 3 in that article it might help. Thanks in advance. > > -- > Swapneel S. Ukhalkar > BSEE UC Santa Barbara > [EMAIL PROTECTED]
I think using the spectral mask is the simplest thing to start with. Other than that, you'll need to use/build a real demodulator for the signals of interest. BBN's been working on this: http://www.mail-archive.com/discuss-gnuradio@gnu.org/msg05060.html Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
