I though NRZI had a constant symbol rate. I would expect 011101001 in NRZI to look like:
_-_--___- Mike On Thu, Apr 02, 2015 at 03:23:57PM -0400, Jeff Long wrote: > > Hey Mike, > > I think that NRZI. > > - Jeff > > On 04/02/2015 02:36 PM, John Ackermann N8UR wrote: > > Why not make the ratio 1:3 and then you could call it Morse PWM. :-) > > > > On 4/2/2015 2:16 PM, Michael Ossmann wrote: > >> A friend recently showed me an OOK modulation that I had never seen > >> before, and I'm wondering if anyone knows a name for this scheme. > >> > >> It is PWM where both the on periods and off periods carry data in their > >> durations. > >> > >> In the example we observed, an on or off period with a duration of two > >> units represents a zero. An on or off period with a duration of one > >> unit represents a one. Example: > >> > >> --_-_--_--__- > >> > >> This sequence of amplitudes represents the binary data 011101001. > >> > >> Note that this scheme has a variable data rate. (Two packets carrying > >> the same number of bits may have different durations.) Overall, > >> however, the data rate is higher than in a similar looking scheme in > >> which data are encoded only in the on periods. > >> > >> Does anyone know what to call this? I am tempted to call it Biphase > >> PWM. > >> > >> Thanks, > >> > >> Mike > >> > >> _______________________________________________ > >> Discuss-gnuradio mailing list > >> [email protected] > >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >> > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > [email protected] > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
