Table 2: Mean and variance of the distribution of the number of visiting branches for each layer under SD ordering and FSD ordering at SNR = 20 dB in 4 × 4 MIMO 64-QAM System.

Layer SD ordering FSD ordering
Mean Variance Mean Variance

4 3.872876347 28.55566101 9.119207119 105.9677423
3 2.23370341 5.910370473 1.603919127 1.855906856
2 1.589407569 1.867583287 1.342484971 0.795757947
1 1.271200344 0.906038796 1.16755946 0.377373481