Dynamic rate-adaptive MIMO mode switching between spatial multiplexing and diversity

EURASIP Journal on Wireless Communications and Networking

Table 4 SNR thresholds for the spatial multiplexing system with ZF receiver from descending search method(M = N = 2, $δ_{0} = 1 0^{- 3}$ )

Average SNR	BPSK	QPSK	16-QAM	64-QAM
0	6.48	9.65	16.56	22.58
1	6.40	9.61	16.55	22.58
2	6.31	9.55	16.54	22.57
3	6.21	9.48	16.52	22.57
4	6.10	9.40	16.50	22.56
5	5.99	9.31	16.47	22.56
6	5.90	9.20	16.43	22.55
7	5.82	9.08	16.39	22.54
8	5.76	8.94	16.34	22.52
9	5.73	8.78	16.28	22.50
10	5.74	8.61	16.21	22.48
11	5.78	8.41	16.13	22.45
12	5.85	8.21	16.03	22.42
13	5.95	8.00	15.92	22.38
14	6.07	7.80	15.79	22.33
15	6.19	7.62	15.64	22.27
16	6.30	7.47	15.48	22.20
17	6.39	7.35	15.30	22.11
18	6.46	7.28	15.11	22.01
19	6.49	7.23	14.91	21.90
20	6.51	7.21	14.73	21.76
21	6.51	7.21	14.57	21.61
22	6.51	7.21	14.43	21.44
23	6.51	7.21	14.34	21.25
24	6.51	7.21	14.29	21.03
25	6.53	7.19	14.27	20.80
26	6.56	7.16	14.30	20.53
27	6.60	7.11	14.37	20.24
28	6.66	7.05	14.48	19.92
29	6.73	6.97	14.62	19.57
30	6.82	6.87	14.80	19.17
31	×	6.76	15.03	18.73
32	×	6.26	15.33	18.23
33	×	6.41	15.71	17.66
34	×	6.13	16.24	17.00
35	×	6.14	×	16.21
36	×	6.63	×	15.24
37	6.48	7.24	×	13.99
38	5.79	8.14	×	12.21
39	5.18	×	×	9.14
≥40	×	×	×	$- \infty$