Maybe I'm misunderstanding your question. It looks to me like line 59 of gr_probe_avg_mag_sqrd_c.cc is calling the filter function. So "input" in that function is just the value that is being passed in there.
On Sun, Mar 20, 2011 at 2:27 PM, Fengyuan Gong <fengyuan.g...@gmail.com> wrote: > Hi, Ben, > I know where to find d_iir, which is actually an instance from class > gr_single_pole_iih.h . > If you have time to take a look at line 92 in gr_single_pole_iih.h, > output = d_alpha * input + d_one_minus_alpha * d_prev_output; > My question is where the input comes from? I think input is coming from RSSI > value reading in from USRP. But not sure how to get it? > Best Regards~ > Fengyuan Gong > On Sun, Mar 20, 2011 at 3:03 PM, Fengyuan Gong <fengyuan.g...@gmail.com> > wrote: >> >> Hi, Ben, >> Thank you for your answer. >> In /gnuradio-core/src/lib/general/gr_probe_avg_mag_sqrd_c.cc file, I saw >> d_unmuted = d_iir.prev_output() >= d_threshold; will determine unmuted to >> be true or false. >> Then I want to know what is the C++ source code for d_iir.prev_output() >> function. >> I try to find it using find . -name "d_iir.*" >> but nothing found. >> why? >> Best Regards~ >> Fenyuan Gong >> >> On Sun, Mar 20, 2011 at 2:38 PM, Ben Reynwar <b...@reynwar.net> wrote: >>> >>> On Sun, Mar 20, 2011 at 10:58 AM, Fengyuan Gong <fengyuan.g...@gmail.com> >>> wrote: >>> > Hi, >>> > I am a new learner of gnuradio. I want to know how gnuradio do carrier >>> > sensing. In the following function, >>> > def carrier_sensed(self): >>> > """ >>> > Return True if we think carrier is present. >>> > """ >>> > #return self.probe.level() > X >>> > return self.probe.unmuted() >>> > I don't know what is the C++ source code for probe.unmuted, can anyone >>> > tell >>> > me where to find it? I want to know how C++ get RSSI and process it to >>> > get >>> > whether carrier is present or not. >>> > Thanks~ >>> > Fengyuan Gong >>> > _______________________________________________ >>> > Discuss-gnuradio mailing list >>> > Discuss-gnuradio@gnu.org >>> > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>> > >>> > >>> >>> Earlier in python file you see: >>> >>> self.probe = gr.probe_avg_mag_sqrd_c(thresh,alpha) >>> >>> The naming convention is that a python block gr.probe_avg_mag_sqrd_c >>> is defined in C++ as >>> gr_probe_avg_mag_sqrd_c. The files defining it will shared that name. >>> >>> Assuming you're using something unix-like you can find it by >>> >>> find . -name "gr_probe_avg_mag_sqrd_c.*" >>> >>> and you'll see the source is at >>> >>> gnuradio-core/src/lib/general/gr_probe_avg_mag_sqrd_c.* >> > > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
