Nick, Here is the part causing problems: http://i.imgur.com/D3dQjtz.png?1
Basically I am transmitting data over an audio cable. On Tue, Apr 30, 2013 at 4:29 PM, Nick Foster <n...@ettus.com> wrote: > On 04/30/2013 04:27 PM, Tyler Foster wrote: > > Hey all, > > I am currently working on a project creating a BPSK modem through GNU > radio and I am having issues with the carrier tracking PLL block on my > receive side. At first I was getting a "beat" in my baseband signal, which > is shown here : http://i.imgur.com/vuaVUs5.png?1 > > I discovered that i need to set the min/max frequency within 0.1 Hz of > the carrier frequency with a loop bandwidth of ~100e-6 to get rid of the > beat, but even then it comes back occasionally. So basically this means > that the PLL cannot lock onto my exact carrier frequency for whatever > reason. Has anyone else had this issue with the PLL? I can tweak it during > run time, but I need it to be able to lock on by itself. > > My other option would be to create my own PLL block. However, the PLL I > would like to use has feedback loops so I cannot create it in GRC. I have > looked into programming a block but my C++ skills are very sub-par. The > biggest issue being how to work with filters/feedback. > > It'd help if you post your flowgraph. > > --n > > > Thanks, > > Tyler > > > _______________________________________________ > Discuss-gnuradio mailing > listDiscuss-gnuradio@gnu.orghttps://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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