On Sat, Apr 01, 2006 at 01:59:09PM -0800, Matt Ettus wrote: > Jens Elsner wrote: > > I resampled all the data to do a proof-of-concept. The frames are > > only a small part of the "chunk" variable. What I am getting is a > > fairly nice pi/4 DPSK. Only that in between OFDM Symbols (there are > > 76 in a frame) there is some sort of random phase jitter. And I am > > clueless what it could be. Frequency offset is compensated, the > > channel doesnt vary that fast. > > I'm confused. Are you seeing: > > good symbol -- jitter -- good symbol -- jitter -- good symbol > > or > > good symbol 76 times and then jitter > > ? > > Are you accounting for the cyclic prefix? I assume that COFDM has one.
I am seeing only good symbols, but with a random phase offset (up to pi/8). The prefix is accounted for. If I do not account for it correctly this results in ISI. Looks like added noise, not like the effect I'm seeing. Jens _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
