From: leonardo232 on
The correlation factor between two channel states is equal to
rho=(2*pi*fd*t). In what i read t is the time difference between the moment
of channel estimation and transmission. In an OFDMA system would this value
be equal to one frame length, several symbol lengths does it depend on the
positioning of the pilots. I am quite confused. I would appreciate any help
here and any typical values for this t.

Thank you

Leo