Figure 4From: Bounds on the capacity regions of half-duplex Gaussian MIMO relay channels Bounds on the capacity of the half-duplex Gaussian relay channel for P 1 = P R = 10 and α = 4 . (a) N 1 = N 2 = N R =1; real deterministic channel coefficients: h AB = d AB − α / 2 . (b) N 1 = N 2 = N R = 2; complex random channel coefficients: [ H AB ] k , ℓ ∼ N C (0, d AB − α ) iid. (avgd. over 1000 channel realizations).Back to article page