Fig. 4From: Neighbor-based joint spatial division and multiplexing in massive MIMO: user scheduling and dynamic beam allocationThe chordal distance of different iterations. \(K=20\), \(U=10\), \(\Delta =5^{\circ }\), \(\text {NAS}=10^{\circ }\), \(\text {SNR}=20~\text {dB}\), \(P_{C}=20\), \(\xi =4\)Back to article page