I am doing my master thesis on crosstalk. I can calculate crosstalk through simulations and practically but unable to calculate theoritcally, if anyone know the calculation of crosstalk in twisted pair quad cables. It will be helpful to me. i am giving voltages to one pair and want to calculate voltages induced in another pair.so, i can calculate crosstalk. I am attaching a photo to understand it clearly.

Specifications:

V1=10V

V2=0A

V3= -10V

V4=0A

Core diameter: 4.05mm

Screen: 20.7+0.15 mm

Outer sheath:24.5mm

Twist: 180mm*cos(9.7[deg])= 1 laylength