From: Time-varying on-body wireless channel model during walking
Σ 1
Σ 3
u
−∞, 2 x 1 − x 0 R 1
2 x 1 − x 0 R 1 , 2 x 2 − x 0 R 1
2 x 2 − x 0 R 1 , ∞
v
− 2 z 0 R 1 , ∞
2 h − z 0 R 1 , ∞