Re: [Discuss-gnuradio] OFDM / DAB demodulation

[Matt Ettus]

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.

Matt