signal integrity analysis from fdtd results

hi to all,
i have simulated stacked grounded coplanar waveguide using 2d fdtd method.
i need to find signal integrity effects on the structure from the simulated result.
how can i find?

cross talk calculation formula

---------- Post added at 10:18 ---------- Previous post was at 09:56 ----------

hi.....
can you give a cross talk calculation formula