Beamforming with Reduced Complexity in MIMO Cooperative Cognitive Radio Networks

Figure 6

Achievable data rates versus 𝑁_SU in the multiantenna SU link for different values of 𝛼 and SNR, when 3 out of 6 antennas are selected at SU RX and CB is employed at cooperating SUs. For dashed lines, 𝛼=0.2 and, for solid lines, 𝛼=0.1.