Can you try using the PSK mod/demod blocks with differential=Yes instead of the DPSK mod/demod blocks? I found an issue today with the DPSK mod/demod blocks which results in them not actually using differential encoding.
--n On Tue, Dec 3, 2013 at 9:00 PM, Henry Jin <henry.ji...@gmail.com> wrote: > Hi, > > I tried to build a simple flow graph of DPSK modulation and demodulation. > The result is verified using the Error Rate module. The link shows the flow > I'm using. > > > https://www.dropbox.com/s/jwmmttyi4es4alf/Screenshot%20from%202013-12-03%2021%3A50%3A58.png > > I know that the output of demod module is unpacked bytes, so an "unpacked > to packed" module is attached after demodulation. However, the BER is close > to 50%, which surely indicates something wrong. I further analyzed the two > inputs of the Error Rate module by writing info to the file sink. It > clearly shows the discrepancy. So I just wonder what is wrong with this > flow graph. Could someone please help me? > > Also, as I noticed, in the output file generated after "unpacked to > packed" module, there are many consecutive 0s at the start of the file. > Does that indicate something? > > Suggestions are greatly appreciated! > > Henry > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
_______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
