Specifying the Computation Method
Select the multi-wall model (COST 231) as the computation method.
- Click the Computation tab.
 - Under Empirical Propagation Models, click Multi-Wall Model (COST 231).
 - 
                Under Computation of signal level along propagation path (valid for
                        all propagation models), click Fresnel
                        Coefficients....
                
Figure 1. The Edit Project Parameters dialog - Computation tab. 
Note: We have imported an antenna pattern from Altair Feko with the complete angle-dependent polarization information (as opposed to a pattern that might only specify a dominant polarization direction and a cross-polarization level).To use this information in the interactions of the rays with the geometry, select Fresnel + GTD/UTD coefficients rather than empirical coefficients for transmission, reflection, and edge diffraction.
 - Click OK to close the Edit Project Parameters dialog.