[Discuss-gnuradio] Resources page

2005-03-08 Thread David Carr
Hi all, I've compiled a page with a list of GnuRadio resources that I've encountered. I'm sure it duplicates content from the wiki or other sources but I found it useful to have it all in one place. Anyway, if its useful to anyone: http://radio.dcarr.org -DC __

Re: [Discuss-gnuradio] Averaging FFT output using FIR filters

2005-03-08 Thread cswiger
On Tue, 8 Mar 2005, James Cooley wrote: > = > In python, the code to build the flow graph to split, take the fir > (average over 2in this example), and combine looks like this: > > for i in range(0,fft_size): > averagefir = gr.fir_filter_fff(1, [1/2,1/2]) >

Re: [Discuss-gnuradio] interpolation and output level

2005-03-08 Thread Matt Ettus
This is also why most systems like this only allow power of 2 ratios. Quoting Matt Ettus <[EMAIL PROTECTED]>: > Quoting Chuck Swiger <[EMAIL PROTECTED]>: > > > Hi - Just curious whats the mechanism behind this: using a usrp xmit > > interpolation of 64 we get max signal level, and it drops off

Re: [Discuss-gnuradio] interpolation and output level

2005-03-08 Thread Matt Ettus
Quoting Chuck Swiger <[EMAIL PROTECTED]>: > Hi - Just curious whats the mechanism behind this: using a usrp xmit > interpolation of 64 we get max signal level, and it drops off a lot if > changed, say to > 40 or 80. With interp=64, sample rate of 200, sig ampl of 6000, center > at 14000e3 and

[Discuss-gnuradio] Averaging FFT output using FIR filters

2005-03-08 Thread James Cooley
Hi all, We were talking about a month ago about building an averager of ffts using fir filters (see "new peakfinding and averaging wxgui fft code") and Martin's comments. I thought I'd try the fft route out so have built some blocks that should do this. The flow graph is supposed to operate lik

[Discuss-gnuradio] RF front end?

2005-03-08 Thread Chen-Mou Cheng
Hi everybody, I'm a grad student working primarily on wireless sensor network stuff. I just got my USRP and am having great fun playing with it. I'd like to do some projects with it (e.g., making it talk to Berkeley Motes), but right now there appears to be no suitable RF front end that works on

[Discuss-gnuradio] interpolation and output level

2005-03-08 Thread Chuck Swiger
Hi - Just curious whats the mechanism behind this: using a usrp xmit interpolation of 64 we get max signal level, and it drops off a lot if changed, say to 40 or 80. With interp=64, sample rate of 200, sig ampl of 6000, center at 14000e3 and freq of 72e3 my output is 3v peak (external amps). C