Table 5 SNR thresholds for OSTBC system obtained from Lagrange multiplier method (M  =  N  = 2,)
From: Dynamic rate-adaptive MIMO mode switching between spatial multiplexing and diversity
Average SNR | BPSK | QPSK | 16-QAM | 64-QAM |
|---|---|---|---|---|
0 | 6.36 | 9.96 | 16.72 | 23.04 |
1 | 6.22 | 9.84 | 16.59 | 22.92 |
2 | 6.03 | 9.67 | 16.42 | 22.76 |
3 | 5.80 | 9.47 | 16.21 | 22.56 |
4 | 5.56 | 9.26 | 16.00 | 22.36 |
5 | 5.32 | 9.05 | 15.79 | 22.16 |
6 | 5.03 | 8.80 | 15.53 | 21.91 |
7 | 4.63 | 8.46 | 15.18 | 21.59 |
8 | 4.17 | 8.08 | 14.79 | 21.21 |
9 | 4.08 | 8.00 | 14.71 | 21.14 |
10 | 4.26 | 8.15 | 14.86 | 21.29 |
11 | 4.47 | 8.33 | 15.04 | 21.46 |
12 | 4.57 | 8.41 | 15.13 | 21.54 |
13 | 4.49 | 8.35 | 15.06 | 21.47 |
14 | 4.19 | 8.09 | 14.80 | 21.23 |
15 | 3.86 | 7.82 | 14.52 | 20.97 |
16 | 3.81 | 7.78 | 14.48 | 20.93 |
17 | 3.90 | 7.85 | 14.56 | 21.00 |
18 | 3.96 | 7.90 | 14.61 | 21.05 |
19 | 3.86 | 7.82 | 14.52 | 20.97 |
20 | 3.49 | 7.51 | 14.21 | 20.68 |
21 | 2.62 | 6.81 | 13.50 | 20.02 |
22 | 0.19 | 4.90 | 11.67 | 18.37 |
≥23 | N. A. | N. A. | N. A. | N. A. |