From: Accuracy of depolarization and delay spread predictions using advanced ray-based modeling in indoor scenarios
Lambertian
αr = 2
αr = 3
αr = 4
S Error
S = 0.2
0.36
0.35
0.37
S = 0.3
0.33
S = 0.4
0.34
0.345
Pattern error
0.347
0.363