Table 1:
Distribution of the modulation levels for different power optimized schemes and their gains.
MSB
LSB
Average spectral efficiency
BW efficiency gain%
Gain at
𝐸
𝑏
/
𝑁
0
=
0
d
B
Gain at
𝐸
𝑏
/
𝑁
0
=
4
d
B
Gain at
𝐸
𝑏
/
𝑁
0
=
8
d
B
Gain at
𝐸
𝑏
/
𝑁
0
=
1
2
d
B
Gain at
𝐸
𝑏
/
𝑁
0
=
1
6
d
B
Combination number
𝑚
7
𝑚
6
𝑚
5
𝑚
4
𝑚
3
𝑚
2
𝑚
1
𝑚
0
1
16
16
16
16
16
16
16
16
4
0
4.97
7.84
11.11
12.79
11.33
2
64
16
16
16
16
16
16
4
4
0
7.55
10.83
14.47
15.07
6.75
3
64
16
16
16
16
16
16
16
4.25
6.25
4.98
7.87
11.15
11.63
2.93
4
64
64
16
16
16
16
4
4
4
0
9.50
13.45
17.21
15.73
4.68
5
64
64
16
16
16
16
16
4
4.25
6.25
7.59
10.90
14.73
12.89
−0.54
6
64
64
16
16
16
16
16
16
4.5
12.5
5.01
7.93
11.12
9.9
−3.79
7
64
64
64
16
16
4
4
4
4
0
10.71
15.58
18.17
14.81
1.07
8
64
64
64
16
16
16
4
4
4.25
6.25
9.59
13.48
16.05
12.51
−2.03
9
64
64
64
16
16
16
16
4
4.5
12.5
7.66
10.92
13.66
10.15
−5.25
10
64
64
64
16
16
16
16
16
4.75
18.75
5.06
8.01
10.84
7.72
−9.38
11
64
64
64
64
4
4
4
4
4
0
11.13
16.38
17.43
12.78
−3.65
12
64
64
64
64
16
4
4
4
4.25
6.25
10.82
15.05
15.99
11.16
−6.59
13
64
64
64
64
16
16
4
4
4.5
12.5
9.68
13.23
14.24
9.14
−8.65
14
64
64
64
64
16
16
16
4
4.75
18.75
7.74
10.87
12.20
7.31
−11.69
15
64
64
64
64
16
16
16
16
5
25
5.15
8.03
9.75
5.18
−14.22
16
64
64
64
64
64
4
4
4
4.5
12.5
10.86
13.47
13.28
7.373
−12.54
17
64
64
64
64
64
16
4
4
4.75
18.75
9.73
12.03
11.81
5.87
−14.41
18
64
64
64
64
64
16
16
4
5
25
7.82
10.08
10.04
4.20
−16.93
19
64
64
64
64
64
16
16
16
5.25
31.25
5.24
7.67
7.99
2.28
−19.10
20
64
64
64
64
64
64
4
4
5
25
9.00
9.85
8.93
2.33
−20.10
21
64
64
64
64
64
64
16
4
5.25
31.25
7.39
8.34
7.44
0.83
−21.90
22
64
64
64
64
64
64
16
16
5.5
37.5
5.12
6.37
5.69
−0.81
−23.81
23
64
64
64
64
64
64
64
4
5.5
37.5
5.69
5.82
4.42
−2.69
−27.10
24
64
64
64
64
64
64
64
16
5.75
43.75
3.97
4.22
2.91
−4.11
−28.83
25
64
64
64
64
64
64
64
64
6
50
1.68
1.41
−0.29
−7.61
−33.08