Table 2 Simulation parameters

Noise variance at UE j (\(\sigma ^2_{A,j}\))

− 111 dBm

Noise variance at UE j due to PS (\(\sigma ^2_{I,j}\))

− 35 dBm

Number of multi-path (\(N^p_{i,j}\))

4

Path loss exponent (k)

3

Cell radius for small-cell

20 m

Maximum transmit power (\(P_{max}\))

38 dBm

Minimum transmit power (\(P_{\min }\))

0

Maximum harvested energy at UE (\(M^{\text {EH}}\))

3.9 mW [51]

Number of antennas in BS (\(M_{\text {BS}}\))

3

Number of antennas in UE

1

Circuit specification (a)

1500 [44]

Circuit specification (b)

0.0022 [44]

AC computing requirement (\(\epsilon _{\text {ac}}\))

0.04764 mW [35]

DC energy management requirement (\(\epsilon _{dc}\))

0.2 mW [35]