Table 2 Optimal ratio ${\nu }_s^{*}$ for the shared spectrum with the number of beams and required SIR

N _b

0

2

4

6

8

10

1

0.69

0.61

0.51

0.37

0.22

0.02

4

0.84

0.78

0.75

0.67

0.59

0.47

8

0.86

0.84

0.80

0.75

0.69

0.59