Need help to determine distance from 3 receivers RSS values in 2D Trilateration

Hi,

Can anyone help me by sharing his trilateration code in 2D grid? I have (5X5) grid,each are seperated by 5meters and where three receivers are placed at location: R1=[0 0]; R2=[5 0]; R3=[3 6];

Also I have 25 files(from 25 grids points) of RSS values(1000 samples) from 3 receivers.

I want to calculate distance using trilateration. But no suitable formula I could find. If you have ay trilateration coding, kindly share.

Regards, Tchow