Figure 4From: Improving energy efficiency through multimode transmission in the downlink MIMO systemsOptimal mode under different scenario. ○: SIMO, ×: SU-MIMO (2,2), +: SU-MIMO (4,2),ξ: SU-MIMO (6,2),◊: MU-MIMO (4,2,2),∇: MU-MIMO (6,2,2),⊲: MU-MIMO (6,2,3).Back to article page