200
S. Hu et al.
1.62 1.63 1.64 1.65 1.66 1.67 1.68 1.69 1.7 1.71
60
80
100
120
140
160
180
200
Phase noise
spectrum
Box dimension
TX1
TX2
TX3
TX4
Fig. 7. View of box dimension and phase noise spectrum with SNR = 9.07 dB
3.81
1.62 1.63 1.64 1.65 1.66 1.67 1.68 1.69 1.7 1.71
3.77
3.775
3.78
3.785
3.79
3.795
3.8
3.805
Fractal
dimension
Box dimension
TX1
TX2
TX3
TX4
Fig. 8. View of box dimension and fractal dimension with SNR = 9.07 dB
1
1.005
1.01
1.015
1.02
1.025 1.03
127
128
129
130
131
132
133
134
Constellation diagonal length
Constellation
angle
Fig. 9. View of constellation diagonal length and angle with SNR = 9.07 dB